// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
///
///
declare namespace Deno {
/** A set of error constructors that are raised by Deno APIs. */
export const errors: {
NotFound: ErrorConstructor;
PermissionDenied: ErrorConstructor;
ConnectionRefused: ErrorConstructor;
ConnectionReset: ErrorConstructor;
ConnectionAborted: ErrorConstructor;
NotConnected: ErrorConstructor;
AddrInUse: ErrorConstructor;
AddrNotAvailable: ErrorConstructor;
BrokenPipe: ErrorConstructor;
AlreadyExists: ErrorConstructor;
InvalidData: ErrorConstructor;
TimedOut: ErrorConstructor;
Interrupted: ErrorConstructor;
WriteZero: ErrorConstructor;
UnexpectedEof: ErrorConstructor;
BadResource: ErrorConstructor;
Http: ErrorConstructor;
Busy: ErrorConstructor;
};
/** The current process id of the runtime. */
export const pid: number;
/** Reflects the `NO_COLOR` environment variable.
*
* See: https://no-color.org/ */
export const noColor: boolean;
export interface TestDefinition {
fn: () => void | Promise;
name: string;
ignore?: boolean;
/** Check that the number of async completed ops after the test is the same
* as number of dispatched ops. Defaults to true.*/
sanitizeOps?: boolean;
/** Ensure the test case does not "leak" resources - ie. the resource table
* after the test has exactly the same contents as before the test. Defaults
* to true. */
sanitizeResources?: boolean;
}
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
* `fn` can be async if required.
* ```ts
* import {assert, fail, assertEquals} from "https://deno.land/std/testing/asserts.ts";
*
* Deno.test({
* name: "example test",
* fn(): void {
* assertEquals("world", "world");
* },
* });
*
* Deno.test({
* name: "example ignored test",
* ignore: Deno.build.os === "windows",
* fn(): void {
* // This test is ignored only on Windows machines
* },
* });
*
* Deno.test({
* name: "example async test",
* async fn() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* });
* ```
*/
export function test(t: TestDefinition): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
* `fn` can be async if required.
*
* ```ts
* import {assert, fail, assertEquals} from "https://deno.land/std/testing/asserts.ts";
*
* Deno.test("My test description", ():void => {
* assertEquals("hello", "hello");
* });
*
* Deno.test("My async test description", async ():Promise => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
* */
export function test(name: string, fn: () => void | Promise): void;
/** Exit the Deno process with optional exit code. If no exit code is supplied
* then Deno will exit with return code of 0.
*
* ```ts
* Deno.exit(5);
* ```
*/
export function exit(code?: number): never;
export const env: {
/** Retrieve the value of an environment variable. Returns undefined if that
* key doesn't exist.
*
* ```ts
* console.log(Deno.env.get("HOME")); // e.g. outputs "/home/alice"
* console.log(Deno.env.get("MADE_UP_VAR")); // outputs "Undefined"
* ```
* Requires `allow-env` permission. */
get(key: string): string | undefined;
/** Set the value of an environment variable.
*
* ```ts
* Deno.env.set("SOME_VAR", "Value"));
* Deno.env.get("SOME_VAR"); // outputs "Value"
* ```
*
* Requires `allow-env` permission. */
set(key: string, value: string): void;
/** Returns a snapshot of the environment variables at invocation.
*
* ```ts
* Deno.env.set("TEST_VAR", "A");
* const myEnv = Deno.env.toObject();
* console.log(myEnv.SHELL);
* Deno.env.set("TEST_VAR", "B");
* console.log(myEnv.TEST_VAR); // outputs "A"
* ```
*
* Requires `allow-env` permission. */
toObject(): { [index: string]: string };
};
/**
* Returns the path to the current deno executable.
*
* ```ts
* console.log(Deno.execPath()); // e.g. "/home/alice/.local/bin/deno"
* ```
*
* Requires `allow-read` permission.
*/
export function execPath(): string;
/**
* Change the current working directory to the specified path.
*
* ```ts
* Deno.chdir("/home/userA");
* Deno.chdir("../userB");
* Deno.chdir("C:\\Program Files (x86)\\Java");
* ```
*
* Throws `Deno.errors.NotFound` if directory not found.
* Throws `Deno.errors.PermissionDenied` if the user does not have access
* rights
*
* Requires --allow-read.
*/
export function chdir(directory: string): void;
/**
* Return a string representing the current working directory.
*
* If the current directory can be reached via multiple paths (due to symbolic
* links), `cwd()` may return any one of them.
*
* ```ts
* const currentWorkingDirectory = Deno.cwd();
* ```
*
* Throws `Deno.errors.NotFound` if directory not available.
*
* Requires --allow-read
*/
export function cwd(): string;
export enum SeekMode {
Start = 0,
Current = 1,
End = 2,
}
export interface Reader {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number of
* bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `read()` resolves to `n` < `p.byteLength`, it may
* use all of `p` as scratch space during the call. If some data is
* available but not `p.byteLength` bytes, `read()` conventionally resolves
* to what is available instead of waiting for more.
*
* When `read()` encounters end-of-file condition, it resolves to EOF
* (`null`).
*
* When `read()` encounters an error, it rejects with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that
* happen after reading some bytes and also both of the allowed EOF
* behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use Deno.iter() to turn a Reader into an AsyncIterator.
*/
read(p: Uint8Array): Promise;
}
export interface ReaderSync {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number
* of bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `read()` returns `n` < `p.byteLength`, it may use
* all of `p` as scratch space during the call. If some data is available
* but not `p.byteLength` bytes, `read()` conventionally returns what is
* available instead of waiting for more.
*
* When `readSync()` encounters end-of-file condition, it returns EOF
* (`null`).
*
* When `readSync()` encounters an error, it throws with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that happen
* after reading some bytes and also both of the allowed EOF behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use Deno.iterSync() to turn a ReaderSync into an Iterator.
*/
readSync(p: Uint8Array): number | null;
}
export interface Writer {
/** Writes `p.byteLength` bytes from `p` to the underlying data stream. It
* resolves to the number of bytes written from `p` (`0` <= `n` <=
* `p.byteLength`) or reject with the error encountered that caused the
* write to stop early. `write()` must reject with a non-null error if
* would resolve to `n` < `p.byteLength`. `write()` must not modify the
* slice data, even temporarily.
*
* Implementations should not retain a reference to `p`.
*/
write(p: Uint8Array): Promise;
}
export interface WriterSync {
/** Writes `p.byteLength` bytes from `p` to the underlying data
* stream. It returns the number of bytes written from `p` (`0` <= `n`
* <= `p.byteLength`) and any error encountered that caused the write to
* stop early. `writeSync()` must throw a non-null error if it returns `n` <
* `p.byteLength`. `writeSync()` must not modify the slice data, even
* temporarily.
*
* Implementations should not retain a reference to `p`.
*/
writeSync(p: Uint8Array): number;
}
export interface Closer {
close(): void;
}
export interface Seeker {
/** Seek sets the offset for the next `read()` or `write()` to offset,
* interpreted according to `whence`: `Start` means relative to the
* start of the file, `Current` means relative to the current offset,
* and `End` means relative to the end. Seek resolves to the new offset
* relative to the start of the file.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
* It returns the number of cursor position.
*/
seek(offset: number, whence: SeekMode): Promise;
}
export interface SeekerSync {
/** Seek sets the offset for the next `readSync()` or `writeSync()` to
* offset, interpreted according to `whence`: `Start` means relative
* to the start of the file, `Current` means relative to the current
* offset, and `End` means relative to the end.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
*/
seekSync(offset: number, whence: SeekMode): number;
}
/** Copies from `src` to `dst` until either EOF (`null`) is read from `src` or
* an error occurs. It resolves to the number of bytes copied or rejects with
* the first error encountered while copying.
*
* ```ts
* const source = await Deno.open("my_file.txt");
* const buffer = new Deno.Buffer()
* const bytesCopied1 = await Deno.copy(source, Deno.stdout);
* const bytesCopied2 = await Deno.copy(source, buffer);
* ```
*
* @param src The source to copy from
* @param dst The destination to copy to
* @param options Can be used to tune size of the buffer. Default size is 32kB
*/
export function copy(
src: Reader,
dst: Writer,
options?: {
bufSize?: number;
}
): Promise;
/** Turns a Reader, `r`, into an async iterator.
*
* ```ts
* let f = await Deno.open("/etc/passwd");
* for await (const chunk of Deno.iter(f)) {
* console.log(chunk);
* }
* f.close();
* ```
*
* Second argument can be used to tune size of a buffer.
* Default size of the buffer is 32kB.
*
* ```ts
* let f = await Deno.open("/etc/passwd");
* const iter = Deno.iter(f, {
* bufSize: 1024 * 1024
* });
* for await (const chunk of iter) {
* console.log(chunk);
* }
* f.close();
* ```
*
* Iterator uses an internal buffer of fixed size for efficiency; it returns
* a view on that buffer on each iteration. It is therefore caller's
* responsibility to copy contents of the buffer if needed; otherwise the
* next iteration will overwrite contents of previously returned chunk.
*/
export function iter(
r: Reader,
options?: {
bufSize?: number;
}
): AsyncIterableIterator;
/** Turns a ReaderSync, `r`, into an iterator.
*
* ```ts
* let f = Deno.openSync("/etc/passwd");
* for (const chunk of Deno.iterSync(f)) {
* console.log(chunk);
* }
* f.close();
* ```
*
* Second argument can be used to tune size of a buffer.
* Default size of the buffer is 32kB.
*
* ```ts
* let f = await Deno.open("/etc/passwd");
* const iter = Deno.iterSync(f, {
* bufSize: 1024 * 1024
* });
* for (const chunk of iter) {
* console.log(chunk);
* }
* f.close();
* ```
*
* Iterator uses an internal buffer of fixed size for efficiency; it returns
* a view on that buffer on each iteration. It is therefore caller's
* responsibility to copy contents of the buffer if needed; otherwise the
* next iteration will overwrite contents of previously returned chunk.
*/
export function iterSync(
r: ReaderSync,
options?: {
bufSize?: number;
}
): IterableIterator;
/** Synchronously open a file and return an instance of `Deno.File`. The
* file does not need to previously exist if using the `create` or `createNew`
* open options. It is the callers responsibility to close the file when finished
* with it.
*
* ```ts
* const file = Deno.openSync("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
* ```
*
* Requires `allow-read` and/or `allow-write` permissions depending on options.
*/
export function openSync(path: string, options?: OpenOptions): File;
/** Open a file and resolve to an instance of `Deno.File`. The
* file does not need to previously exist if using the `create` or `createNew`
* open options. It is the callers responsibility to close the file when finished
* with it.
*
* ```ts
* const file = await Deno.open("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
* ```
*
* Requires `allow-read` and/or `allow-write` permissions depending on options.
*/
export function open(path: string, options?: OpenOptions): Promise;
/** Creates a file if none exists or truncates an existing file and returns
* an instance of `Deno.File`.
*
* ```ts
* const file = Deno.createSync("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*/
export function createSync(path: string): File;
/** Creates a file if none exists or truncates an existing file and resolves to
* an instance of `Deno.File`.
*
* ```ts
* const file = await Deno.create("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*/
export function create(path: string): Promise;
/** Synchronously read from a resource ID (`rid`) into an array buffer (`buffer`).
*
* Returns either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* This function is one of the lowest level APIs and most users should not
* work with this directly, but rather use Deno.readAllSync() instead.
*
* **It is not guaranteed that the full buffer will be read in a single call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* const file = Deno.openSync("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = Deno.readSync(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* Deno.close(file.rid);
* ```
*/
export function readSync(rid: number, buffer: Uint8Array): number | null;
/** Read from a resource ID (`rid`) into an array buffer (`buffer`).
*
* Resolves to either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* This function is one of the lowest level APIs and most users should not
* work with this directly, but rather use Deno.readAll() instead.
*
* **It is not guaranteed that the full buffer will be read in a single call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* const file = await Deno.open("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = await Deno.read(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* Deno.close(file.rid);
* ```
*/
export function read(rid: number, buffer: Uint8Array): Promise;
/** Synchronously write to the resource ID (`rid`) the contents of the array
* buffer (`data`).
*
* Returns the number of bytes written. This function is one of the lowest
* level APIs and most users should not work with this directly, but rather use
* Deno.writeAllSync() instead.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* const file = Deno.openSync("/foo/bar.txt", {write: true});
* const bytesWritten = Deno.writeSync(file.rid, data); // 11
* Deno.close(file.rid);
* ```
*/
export function writeSync(rid: number, data: Uint8Array): number;
/** Write to the resource ID (`rid`) the contents of the array buffer (`data`).
*
* Resolves to the number of bytes written. This function is one of the lowest
* level APIs and most users should not work with this directly, but rather use
* Deno.writeAll() instead.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* const file = await Deno.open("/foo/bar.txt", { write: true });
* const bytesWritten = await Deno.write(file.rid, data); // 11
* Deno.close(file.rid);
* ```
*/
export function write(rid: number, data: Uint8Array): Promise;
/** Synchronously seek a resource ID (`rid`) to the given `offset` under mode
* given by `whence`. The new position within the resource (bytes from the
* start) is returned.
*
* ```ts
* const file = Deno.openSync('hello.txt', {read: true, write: true, truncate: true, create: true});
* Deno.writeSync(file.rid, new TextEncoder().encode("Hello world"));
* // advance cursor 6 bytes
* const cursorPosition = Deno.seekSync(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* file.readSync(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* // Seek 6 bytes from the start of the file
* console.log(Deno.seekSync(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(Deno.seekSync(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(Deno.seekSync(file.rid, -2, Deno.SeekMode.End)); // "9" (e.g. 11-2)
* ```
*/
export function seekSync(
rid: number,
offset: number,
whence: SeekMode
): number;
/** Seek a resource ID (`rid`) to the given `offset` under mode given by `whence`.
* The call resolves to the new position within the resource (bytes from the start).
*
* ```ts
* const file = await Deno.open('hello.txt', {read: true, write: true, truncate: true, create: true});
* await Deno.write(file.rid, new TextEncoder().encode("Hello world"));
* // advance cursor 6 bytes
* const cursorPosition = await Deno.seek(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* await file.read(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* // Seek 6 bytes from the start of the file
* console.log(await Deno.seek(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(await Deno.seek(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(await Deno.seek(file.rid, -2, Deno.SeekMode.End)); // "9" (e.g. 11-2)
* ```
*/
export function seek(
rid: number,
offset: number,
whence: SeekMode
): Promise;
/** Close the given resource ID (rid) which has been previously opened, such
* as via opening or creating a file. Closing a file when you are finished
* with it is important to avoid leaking resources.
*
* ```ts
* const file = await Deno.open("my_file.txt");
* // do work with "file" object
* Deno.close(file.rid);
* ````
*/
export function close(rid: number): void;
/** The Deno abstraction for reading and writing files. */
export class File
implements
Reader,
ReaderSync,
Writer,
WriterSync,
Seeker,
SeekerSync,
Closer {
readonly rid: number;
constructor(rid: number);
write(p: Uint8Array): Promise;
writeSync(p: Uint8Array): number;
read(p: Uint8Array): Promise;
readSync(p: Uint8Array): number | null;
seek(offset: number, whence: SeekMode): Promise;
seekSync(offset: number, whence: SeekMode): number;
close(): void;
}
/** A handle for `stdin`. */
export const stdin: Reader & ReaderSync & Closer & { rid: number };
/** A handle for `stdout`. */
export const stdout: Writer & WriterSync & Closer & { rid: number };
/** A handle for `stderr`. */
export const stderr: Writer & WriterSync & Closer & { rid: number };
export interface OpenOptions {
/** Sets the option for read access. This option, when `true`, means that the
* file should be read-able if opened. */
read?: boolean;
/** Sets the option for write access. This option, when `true`, means that
* the file should be write-able if opened. If the file already exists,
* any write calls on it will overwrite its contents, by default without
* truncating it. */
write?: boolean;
/**Sets the option for the append mode. This option, when `true`, means that
* writes will append to a file instead of overwriting previous contents.
* Note that setting `{ write: true, append: true }` has the same effect as
* setting only `{ append: true }`. */
append?: boolean;
/** Sets the option for truncating a previous file. If a file is
* successfully opened with this option set it will truncate the file to `0`
* size if it already exists. The file must be opened with write access
* for truncate to work. */
truncate?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path. Requires write or append access to be
* used. */
create?: boolean;
/** Defaults to `false`. If set to `true`, no file, directory, or symlink is
* allowed to exist at the target location. Requires write or append
* access to be used. When createNew is set to `true`, create and truncate
* are ignored. */
createNew?: boolean;
/** Permissions to use if creating the file (defaults to `0o666`, before
* the process's umask).
* Ignored on Windows. */
mode?: number;
}
/**
*
* Check if a given resource id (`rid`) is a TTY.
*
* ```ts
* // This example is system and context specific
* const nonTTYRid = Deno.openSync("my_file.txt").rid;
* const ttyRid = Deno.openSync("/dev/tty6").rid;
* console.log(Deno.isatty(nonTTYRid)); // false
* console.log(Deno.isatty(ttyRid)); // true
* Deno.close(nonTTYRid);
* Deno.close(ttyRid);
* ```
*/
export function isatty(rid: number): boolean;
/** A variable-sized buffer of bytes with `read()` and `write()` methods.
*
* Deno.Buffer is almost always used with some I/O like files and sockets. It
* allows one to buffer up a download from a socket. Buffer grows and shrinks
* as necessary.
*
* Deno.Buffer is NOT the same thing as Node's Buffer. Node's Buffer was
* created in 2009 before JavaScript had the concept of ArrayBuffers. It's
* simply a non-standard ArrayBuffer.
*
* ArrayBuffer is a fixed memory allocation. Deno.Buffer is implemented on top
* of ArrayBuffer.
*
* Based on [Go Buffer](https://golang.org/pkg/bytes/#Buffer). */
export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
constructor(ab?: ArrayBuffer);
/** Returns a slice holding the unread portion of the buffer.
*
* The slice is valid for use only until the next buffer modification (that
* is, only until the next call to a method like `read()`, `write()`,
* `reset()`, or `truncate()`). The slice aliases the buffer content at
* least until the next buffer modification, so immediate changes to the
* slice will affect the result of future reads. */
bytes(): Uint8Array;
/** Returns whether the unread portion of the buffer is empty. */
empty(): boolean;
/** A read only number of bytes of the unread portion of the buffer. */
readonly length: number;
/** The read only capacity of the buffer's underlying byte slice, that is,
* the total space allocated for the buffer's data. */
readonly capacity: number;
/** Discards all but the first `n` unread bytes from the buffer but
* continues to use the same allocated storage. It throws if `n` is
* negative or greater than the length of the buffer. */
truncate(n: number): void;
/** Resets the buffer to be empty, but it retains the underlying storage for
* use by future writes. `.reset()` is the same as `.truncate(0)`. */
reset(): void;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Returns the number of bytes read. If the buffer has no data to
* return, the return is EOF (`null`). */
readSync(p: Uint8Array): number | null;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Resolves to the number of bytes read. If the buffer has no
* data to return, resolves to EOF (`null`).
*
* NOTE: This methods reads bytes sychronously; it's provided for
* compatibility with `Reader` interfaces.
*/
read(p: Uint8Array): Promise;
writeSync(p: Uint8Array): number;
/** NOTE: This methods writes bytes sychronously; it's provided for
* compatibility with `Writer` interface. */
write(p: Uint8Array): Promise;
/** Grows the buffer's capacity, if necessary, to guarantee space for
* another `n` bytes. After `.grow(n)`, at least `n` bytes can be written to
* the buffer without another allocation. If `n` is negative, `.grow()` will
* throw. If the buffer can't grow it will throw an error.
*
* Based on Go Lang's
* [Buffer.Grow](https://golang.org/pkg/bytes/#Buffer.Grow). */
grow(n: number): void;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It resolves to the number of bytes read.
* If the buffer becomes too large, `.readFrom()` will reject with an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFrom(r: Reader): Promise;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It returns the number of bytes read. If the
* buffer becomes too large, `.readFromSync()` will throw an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFromSync(r: ReaderSync): number;
}
/** Read Reader `r` until EOF (`null`) and resolve to the content as
* Uint8Array`.
*
* ```ts
* // Example from stdin
* const stdinContent = await Deno.readAll(Deno.stdin);
*
* // Example from file
* const file = await Deno.open("my_file.txt", {read: true});
* const myFileContent = await Deno.readAll(file);
* Deno.close(file.rid);
*
* // Example from buffer
* const myData = new Uint8Array(100);
* // ... fill myData array with data
* const reader = new Deno.Buffer(myData.buffer as ArrayBuffer);
* const bufferContent = await Deno.readAll(reader);
* ```
*/
export function readAll(r: Reader): Promise;
/** Synchronously reads Reader `r` until EOF (`null`) and returns the content
* as `Uint8Array`.
*
* ```ts
* // Example from stdin
* const stdinContent = Deno.readAllSync(Deno.stdin);
*
* // Example from file
* const file = Deno.openSync("my_file.txt", {read: true});
* const myFileContent = Deno.readAllSync(file);
* Deno.close(file.rid);
*
* // Example from buffer
* const myData = new Uint8Array(100);
* // ... fill myData array with data
* const reader = new Deno.Buffer(myData.buffer as ArrayBuffer);
* const bufferContent = Deno.readAllSync(reader);
* ```
*/
export function readAllSync(r: ReaderSync): Uint8Array;
/** Write all the content of the array buffer (`arr`) to the writer (`w`).
*
* ```ts
* // Example writing to stdout
* const contentBytes = new TextEncoder().encode("Hello World");
* await Deno.writeAll(Deno.stdout, contentBytes);
*
* // Example writing to file
* const contentBytes = new TextEncoder().encode("Hello World");
* const file = await Deno.open('test.file', {write: true});
* await Deno.writeAll(file, contentBytes);
* Deno.close(file.rid);
*
* // Example writing to buffer
* const contentBytes = new TextEncoder().encode("Hello World");
* const writer = new Deno.Buffer();
* await Deno.writeAll(writer, contentBytes);
* console.log(writer.bytes().length); // 11
* ```
*/
export function writeAll(w: Writer, arr: Uint8Array): Promise;
/** Synchronously write all the content of the array buffer (`arr`) to the
* writer (`w`).
*
* ```ts
* // Example writing to stdout
* const contentBytes = new TextEncoder().encode("Hello World");
* Deno.writeAllSync(Deno.stdout, contentBytes);
*
* // Example writing to file
* const contentBytes = new TextEncoder().encode("Hello World");
* const file = Deno.openSync('test.file', {write: true});
* Deno.writeAllSync(file, contentBytes);
* Deno.close(file.rid);
*
* // Example writing to buffer
* const contentBytes = new TextEncoder().encode("Hello World");
* const writer = new Deno.Buffer();
* Deno.writeAllSync(writer, contentBytes);
* console.log(writer.bytes().length); // 11
* ```
*/
export function writeAllSync(w: WriterSync, arr: Uint8Array): void;
export interface MkdirOptions {
/** Defaults to `false`. If set to `true`, means that any intermediate
* directories will also be created (as with the shell command `mkdir -p`).
* Intermediate directories are created with the same permissions.
* When recursive is set to `true`, succeeds silently (without changing any
* permissions) if a directory already exists at the path, or if the path
* is a symlink to an existing directory. */
recursive?: boolean;
/** Permissions to use when creating the directory (defaults to `0o777`,
* before the process's umask).
* Ignored on Windows. */
mode?: number;
}
/** Synchronously creates a new directory with the specified path.
*
* ```ts
* Deno.mkdirSync("new_dir");
* Deno.mkdirSync("nested/directories", { recursive: true });
* Deno.mkdirSync("restricted_access_dir", { mode: 0o700 });
* ```
*
* Defaults to throwing error if the directory already exists.
*
* Requires `allow-write` permission. */
export function mkdirSync(path: string, options?: MkdirOptions): void;
/** Creates a new directory with the specified path.
*
* ```ts
* await Deno.mkdir("new_dir");
* await Deno.mkdir("nested/directories", { recursive: true });
* await Deno.mkdir("restricted_access_dir", { mode: 0o700 });
* ```
*
* Defaults to throwing error if the directory already exists.
*
* Requires `allow-write` permission. */
export function mkdir(path: string, options?: MkdirOptions): Promise;
export interface MakeTempOptions {
/** Directory where the temporary directory should be created (defaults to
* the env variable TMPDIR, or the system's default, usually /tmp).
*
* Note that if the passed `dir` is relative, the path returned by
* makeTempFile() and makeTempDir() will also be relative. Be mindful of
* this when changing working directory. */
dir?: string;
/** String that should precede the random portion of the temporary
* directory's name. */
prefix?: string;
/** String that should follow the random portion of the temporary
* directory's name. */
suffix?: string;
}
/** Synchronously creates a new temporary directory in the default directory
* for temporary files (see also `Deno.dir("temp")`), unless `dir` is specified.
* Other optional options include prefixing and suffixing the directory name
* with `prefix` and `suffix` respectively.
*
* The full path to the newly created directory is returned.
*
* Multiple programs calling this function simultaneously will create different
* directories. It is the caller's responsibility to remove the directory when
* no longer needed.
*
* ```ts
* const tempDirName0 = Deno.makeTempDirSync(); // e.g. /tmp/2894ea76
* const tempDirName1 = Deno.makeTempDirSync({ prefix: 'my_temp' }); // e.g. /tmp/my_temp339c944d
* ```
*
* Requires `allow-write` permission. */
// TODO(ry) Doesn't check permissions.
export function makeTempDirSync(options?: MakeTempOptions): string;
/** Creates a new temporary directory in the default directory for temporary
* files (see also `Deno.dir("temp")`), unless `dir` is specified. Other
* optional options include prefixing and suffixing the directory name with
* `prefix` and `suffix` respectively.
*
* This call resolves to the full path to the newly created directory.
*
* Multiple programs calling this function simultaneously will create different
* directories. It is the caller's responsibility to remove the directory when
* no longer needed.
*
* ```ts
* const tempDirName0 = await Deno.makeTempDir(); // e.g. /tmp/2894ea76
* const tempDirName1 = await Deno.makeTempDir({ prefix: 'my_temp' }); // e.g. /tmp/my_temp339c944d
* ```
*
* Requires `allow-write` permission. */
// TODO(ry) Doesn't check permissions.
export function makeTempDir(options?: MakeTempOptions): Promise;
/** Synchronously creates a new temporary file in the default directory for
* temporary files (see also `Deno.dir("temp")`), unless `dir` is specified.
* Other optional options include prefixing and suffixing the directory name
* with `prefix` and `suffix` respectively.
*
* The full path to the newly created file is returned.
*
* Multiple programs calling this function simultaneously will create different
* files. It is the caller's responsibility to remove the file when no longer
* needed.
*
* ```ts
* const tempFileName0 = Deno.makeTempFileSync(); // e.g. /tmp/419e0bf2
* const tempFileName1 = Deno.makeTempFileSync({ prefix: 'my_temp' }); // e.g. /tmp/my_temp754d3098
* ```
*
* Requires `allow-write` permission. */
export function makeTempFileSync(options?: MakeTempOptions): string;
/** Creates a new temporary file in the default directory for temporary
* files (see also `Deno.dir("temp")`), unless `dir` is specified. Other
* optional options include prefixing and suffixing the directory name with
* `prefix` and `suffix` respectively.
*
* This call resolves to the full path to the newly created file.
*
* Multiple programs calling this function simultaneously will create different
* files. It is the caller's responsibility to remove the file when no longer
* needed.
*
* ```ts
* const tmpFileName0 = await Deno.makeTempFile(); // e.g. /tmp/419e0bf2
* const tmpFileName1 = await Deno.makeTempFile({ prefix: 'my_temp' }); // e.g. /tmp/my_temp754d3098
* ```
*
* Requires `allow-write` permission. */
export function makeTempFile(options?: MakeTempOptions): Promise;
/** Synchronously changes the permission of a specific file/directory of
* specified path. Ignores the process's umask.
*
* ```ts
* Deno.chmodSync("/path/to/file", 0o666);
* ```
*
* For a full description, see [chmod](#chmod)
*
* NOTE: This API currently throws on Windows
*
* Requires `allow-write` permission. */
export function chmodSync(path: string, mode: number): void;
/** Changes the permission of a specific file/directory of specified path.
* Ignores the process's umask.
*
* ```ts
* await Deno.chmod("/path/to/file", 0o666);
* ```
*
* The mode is a sequence of 3 octal numbers. The first/left-most number
* specifies the permissions for the owner. The second number specifies the
* permissions for the group. The last/right-most number specifies the
* permissions for others. For example, with a mode of 0o764, the owner (7) can
* read/write/execute, the group (6) can read/write and everyone else (4) can
* read only.
*
* | Number | Description |
* | ------ | ----------- |
* | 7 | read, write, and execute |
* | 6 | read and write |
* | 5 | read and execute |
* | 4 | read only |
* | 3 | write and execute |
* | 2 | write only |
* | 1 | execute only |
* | 0 | no permission |
*
* NOTE: This API currently throws on Windows
*
* Requires `allow-write` permission. */
export function chmod(path: string, mode: number): Promise;
/** Synchronously change owner of a regular file or directory. This functionality
* is not available on Windows.
*
* ```ts
* Deno.chownSync("myFile.txt", 1000, 1002);
* ```
*
* Requires `allow-write` permission.
*
* Throws Error (not implemented) if executed on Windows
*
* @param path path to the file
* @param uid user id (UID) of the new owner
* @param gid group id (GID) of the new owner
*/
export function chownSync(path: string, uid: number, gid: number): void;
/** Change owner of a regular file or directory. This functionality
* is not available on Windows.
*
* ```ts
* await Deno.chown("myFile.txt", 1000, 1002);
* ```
*
* Requires `allow-write` permission.
*
* Throws Error (not implemented) if executed on Windows
*
* @param path path to the file
* @param uid user id (UID) of the new owner
* @param gid group id (GID) of the new owner
*/
export function chown(path: string, uid: number, gid: number): Promise;
export interface RemoveOptions {
/** Defaults to `false`. If set to `true`, path will be removed even if
* it's a non-empty directory. */
recursive?: boolean;
}
/** Synchronously removes the named file or directory.
*
* ```ts
* Deno.removeSync("/path/to/empty_dir/or/file");
* Deno.removeSync("/path/to/populated_dir/or/file", { recursive: true });
* ```
*
* Throws error if permission denied, path not found, or path is a non-empty
* directory and the `recursive` option isn't set to `true`.
*
* Requires `allow-write` permission. */
export function removeSync(path: string, options?: RemoveOptions): void;
/** Removes the named file or directory.
*
* ```ts
* await Deno.remove("/path/to/empty_dir/or/file");
* await Deno.remove("/path/to/populated_dir/or/file", { recursive: true });
* ```
*
* Throws error if permission denied, path not found, or path is a non-empty
* directory and the `recursive` option isn't set to `true`.
*
* Requires `allow-write` permission. */
export function remove(path: string, options?: RemoveOptions): Promise;
/** Synchronously renames (moves) `oldpath` to `newpath`. Paths may be files or
* directories. If `newpath` already exists and is not a directory,
* `renameSync()` replaces it. OS-specific restrictions may apply when
* `oldpath` and `newpath` are in different directories.
*
* ```ts
* Deno.renameSync("old/path", "new/path");
* ```
*
* On Unix, this operation does not follow symlinks at either path.
*
* It varies between platforms when the operation throws errors, and if so what
* they are. It's always an error to rename anything to a non-empty directory.
*
* Requires `allow-read` and `allow-write` permissions. */
export function renameSync(oldpath: string, newpath: string): void;
/** Renames (moves) `oldpath` to `newpath`. Paths may be files or directories.
* If `newpath` already exists and is not a directory, `rename()` replaces it.
* OS-specific restrictions may apply when `oldpath` and `newpath` are in
* different directories.
*
* ```ts
* await Deno.rename("old/path", "new/path");
* ```
*
* On Unix, this operation does not follow symlinks at either path.
*
* It varies between platforms when the operation throws errors, and if so what
* they are. It's always an error to rename anything to a non-empty directory.
*
* Requires `allow-read` and `allow-write` permission. */
export function rename(oldpath: string, newpath: string): Promise;
/** Synchronously reads and returns the entire contents of a file as utf8 encoded string
* encoded string. Reading a directory returns an empty string.
*
* ```ts
* const data = Deno.readTextFileSync("hello.txt");
* console.log(data);
* ```
*
* Requires `allow-read` permission. */
export function readTextFileSync(path: string): string;
/** Asynchronously reads and returns the entire contents of a file as a utf8
* encoded string. Reading a directory returns an empty data array.
*
* ```ts
* const data = await Deno.readTextFile("hello.txt");
* console.log(data);
* ```
*
* Requires `allow-read` permission. */
export function readTextFile(path: string): Promise;
/** Synchronously reads and returns the entire contents of a file as an array
* of bytes. `TextDecoder` can be used to transform the bytes to string if
* required. Reading a directory returns an empty data array.
*
* ```ts
* const decoder = new TextDecoder("utf-8");
* const data = Deno.readFileSync("hello.txt");
* console.log(decoder.decode(data));
* ```
*
* Requires `allow-read` permission. */
export function readFileSync(path: string): Uint8Array;
/** Reads and resolves to the entire contents of a file as an array of bytes.
* `TextDecoder` can be used to transform the bytes to string if required.
* Reading a directory returns an empty data array.
*
* ```ts
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello.txt");
* console.log(decoder.decode(data));
* ```
*
* Requires `allow-read` permission. */
export function readFile(path: string): Promise;
/** A FileInfo describes a file and is returned by `stat`, `lstat`,
* `statSync`, `lstatSync`. */
export interface FileInfo {
/** True if this is info for a regular file. Mutually exclusive to
* `FileInfo.isDirectory` and `FileInfo.isSymlink`. */
isFile: boolean;
/** True if this is info for a regular directory. Mutually exclusive to
* `FileInfo.isFile` and `FileInfo.isSymlink`. */
isDirectory: boolean;
/** True if this is info for a symlink. Mutually exclusive to
* `FileInfo.isFile` and `FileInfo.isDirectory`. */
isSymlink: boolean;
/** The size of the file, in bytes. */
size: number;
/** The last modification time of the file. This corresponds to the `mtime`
* field from `stat` on Linux/Mac OS and `ftLastWriteTime` on Windows. This
* may not be available on all platforms. */
mtime: Date | null;
/** The last access time of the file. This corresponds to the `atime`
* field from `stat` on Unix and `ftLastAccessTime` on Windows. This may not
* be available on all platforms. */
atime: Date | null;
/** The creation time of the file. This corresponds to the `birthtime`
* field from `stat` on Mac/BSD and `ftCreationTime` on Windows. This may
* not be available on all platforms. */
birthtime: Date | null;
/** ID of the device containing the file.
*
* _Linux/Mac OS only._ */
dev: number | null;
/** Inode number.
*
* _Linux/Mac OS only._ */
ino: number | null;
/** **UNSTABLE**: Match behavior with Go on Windows for `mode`.
*
* The underlying raw `st_mode` bits that contain the standard Unix
* permissions for this file/directory. */
mode: number | null;
/** Number of hard links pointing to this file.
*
* _Linux/Mac OS only._ */
nlink: number | null;
/** User ID of the owner of this file.
*
* _Linux/Mac OS only._ */
uid: number | null;
/** Group ID of the owner of this file.
*
* _Linux/Mac OS only._ */
gid: number | null;
/** Device ID of this file.
*
* _Linux/Mac OS only._ */
rdev: number | null;
/** Blocksize for filesystem I/O.
*
* _Linux/Mac OS only._ */
blksize: number | null;
/** Number of blocks allocated to the file, in 512-byte units.
*
* _Linux/Mac OS only._ */
blocks: number | null;
}
/** Returns absolute normalized path, with symbolic links resolved.
*
* ```ts
* // e.g. given /home/alice/file.txt and current directory /home/alice
* Deno.symlinkSync("file.txt", "symlink_file.txt");
* const realPath = Deno.realPathSync("./file.txt");
* const realSymLinkPath = Deno.realPathSync("./symlink_file.txt");
* console.log(realPath); // outputs "/home/alice/file.txt"
* console.log(realSymLinkPath); // outputs "/home/alice/file.txt"
* ```
*
* Requires `allow-read` permission for the target path.
* Also requires `allow-read` permission for the CWD if the target path is
* relative.*/
export function realPathSync(path: string): string;
/** Resolves to the absolute normalized path, with symbolic links resolved.
*
* ```ts
* // e.g. given /home/alice/file.txt and current directory /home/alice
* await Deno.symlink("file.txt", "symlink_file.txt");
* const realPath = await Deno.realPath("./file.txt");
* const realSymLinkPath = await Deno.realPath("./symlink_file.txt");
* console.log(realPath); // outputs "/home/alice/file.txt"
* console.log(realSymLinkPath); // outputs "/home/alice/file.txt"
* ```
*
* Requires `allow-read` permission for the target path.
* Also requires `allow-read` permission for the CWD if the target path is
* relative.*/
export function realPath(path: string): Promise;
export interface DirEntry {
name: string;
isFile: boolean;
isDirectory: boolean;
isSymlink: boolean;
}
/** Synchronously reads the directory given by `path` and returns an iterable
* of `Deno.DirEntry`.
*
* ```ts
* for (const dirEntry of Deno.readDirSync("/")) {
* console.log(dirEntry.name);
* }
* ```
*
* Throws error if `path` is not a directory.
*
* Requires `allow-read` permission. */
export function readDirSync(path: string): Iterable;
/** Reads the directory given by `path` and returns an async iterable of
* `Deno.DirEntry`.
*
* ```ts
* for await (const dirEntry of Deno.readDir("/")) {
* console.log(dirEntry.name);
* }
* ```
*
* Throws error if `path` is not a directory.
*
* Requires `allow-read` permission. */
export function readDir(path: string): AsyncIterable;
/** Synchronously copies the contents and permissions of one file to another
* specified path, by default creating a new file if needed, else overwriting.
* Fails if target path is a directory or is unwritable.
*
* ```ts
* Deno.copyFileSync("from.txt", "to.txt");
* ```
*
* Requires `allow-read` permission on fromPath.
* Requires `allow-write` permission on toPath. */
export function copyFileSync(fromPath: string, toPath: string): void;
/** Copies the contents and permissions of one file to another specified path,
* by default creating a new file if needed, else overwriting. Fails if target
* path is a directory or is unwritable.
*
* ```ts
* await Deno.copyFile("from.txt", "to.txt");
* ```
*
* Requires `allow-read` permission on fromPath.
* Requires `allow-write` permission on toPath. */
export function copyFile(fromPath: string, toPath: string): Promise;
/** Returns the full path destination of the named symbolic link.
*
* ```ts
* Deno.symlinkSync("./test.txt", "./test_link.txt");
* const target = Deno.readLinkSync("./test_link.txt"); // full path of ./test.txt
* ```
*
* Throws TypeError if called with a hard link
*
* Requires `allow-read` permission. */
export function readLinkSync(path: string): string;
/** Resolves to the full path destination of the named symbolic link.
*
* ```ts
* await Deno.symlink("./test.txt", "./test_link.txt");
* const target = await Deno.readLink("./test_link.txt"); // full path of ./test.txt
* ```
*
* Throws TypeError if called with a hard link
*
* Requires `allow-read` permission. */
export function readLink(path: string): Promise;
/** Resolves to a `Deno.FileInfo` for the specified `path`. If `path` is a
* symlink, information for the symlink will be returned instead of what it
* points to.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
* const fileInfo = await Deno.lstat("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission. */
export function lstat(path: string): Promise;
/** Synchronously returns a `Deno.FileInfo` for the specified `path`. If
* `path` is a symlink, information for the symlink will be returned instead of
* what it points to..
*
* ```ts
* const fileInfo = Deno.lstatSync("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission. */
export function lstatSync(path: string): FileInfo;
/** Resolves to a `Deno.FileInfo` for the specified `path`. Will always
* follow symlinks.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
* const fileInfo = await Deno.stat("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission. */
export function stat(path: string): Promise;
/** Synchronously returns a `Deno.FileInfo` for the specified `path`. Will
* always follow symlinks.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
* const fileInfo = Deno.statSync("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission. */
export function statSync(path: string): FileInfo;
/** Options for writing to a file. */
export interface WriteFileOptions {
/** Defaults to `false`. If set to `true`, will append to a file instead of
* overwriting previous contents. */
append?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path (defaults to `true`). */
create?: boolean;
/** Permissions always applied to file. */
mode?: number;
}
/** Synchronously write `data` to the given `path`, by default creating a new
* file if needed, else overwriting.
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world\n");
* Deno.writeFileSync("hello1.txt", data); // overwrite "hello1.txt" or create it
* Deno.writeFileSync("hello2.txt", data, {create: false}); // only works if "hello2.txt" exists
* Deno.writeFileSync("hello3.txt", data, {mode: 0o777}); // set permissions on new file
* Deno.writeFileSync("hello4.txt", data, {append: true}); // add data to the end of the file
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is
* `false`.
*/
export function writeFileSync(
path: string,
data: Uint8Array,
options?: WriteFileOptions
): void;
/** Write `data` to the given `path`, by default creating a new file if needed,
* else overwriting.
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world\n");
* await Deno.writeFile("hello1.txt", data); // overwrite "hello1.txt" or create it
* await Deno.writeFile("hello2.txt", data, {create: false}); // only works if "hello2.txt" exists
* await Deno.writeFile("hello3.txt", data, {mode: 0o777}); // set permissions on new file
* await Deno.writeFile("hello4.txt", data, {append: true}); // add data to the end of the file
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is `false`.
*/
export function writeFile(
path: string,
data: Uint8Array,
options?: WriteFileOptions
): Promise;
/** Synchronously write string `data` to the given `path`, by default creating a new file if needed,
* else overwriting.
*
* ```ts
* await Deno.writeTextFileSync("hello1.txt", "Hello world\n"); // overwrite "hello1.txt" or create it
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is `false`.
*/
export function writeTextFileSync(path: string, data: string): void;
/** Asynchronously write string `data` to the given `path`, by default creating a new file if needed,
* else overwriting.
*
* ```ts
* await Deno.writeTextFile("hello1.txt", "Hello world\n"); // overwrite "hello1.txt" or create it
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is `false`.
*/
export function writeTextFile(path: string, data: string): Promise;
/** Synchronously truncates or extends the specified file, to reach the
* specified `len`. If `len` is not specified then the entire file contents
* are truncated.
*
* ```ts
* // truncate the entire file
* Deno.truncateSync("my_file.txt");
*
* // truncate part of the file
* const file = Deno.makeTempFileSync();
* Deno.writeFileSync(file, new TextEncoder().encode("Hello World"));
* Deno.truncateSync(file, 7);
* const data = Deno.readFileSync(file);
* console.log(new TextDecoder().decode(data));
* ```
*
* Requires `allow-write` permission. */
export function truncateSync(name: string, len?: number): void;
/** Truncates or extends the specified file, to reach the specified `len`. If
* `len` is not specified then the entire file contents are truncated.
*
* ```ts
* // truncate the entire file
* await Deno.truncate("my_file.txt");
*
* // truncate part of the file
* const file = await Deno.makeTempFile();
* await Deno.writeFile(file, new TextEncoder().encode("Hello World"));
* await Deno.truncate(file, 7);
* const data = await Deno.readFile(file);
* console.log(new TextDecoder().decode(data)); // "Hello W"
* ```
*
* Requires `allow-write` permission. */
export function truncate(name: string, len?: number): Promise;
export interface NetAddr {
transport: "tcp" | "udp";
hostname: string;
port: number;
}
export interface UnixAddr {
transport: "unix" | "unixpacket";
path: string;
}
export type Addr = NetAddr | UnixAddr;
/** A generic network listener for stream-oriented protocols. */
export interface Listener extends AsyncIterable {
/** Waits for and resolves to the next connection to the `Listener`. */
accept(): Promise;
/** Close closes the listener. Any pending accept promises will be rejected
* with errors. */
close(): void;
/** Return the address of the `Listener`. */
readonly addr: Addr;
[Symbol.asyncIterator](): AsyncIterableIterator;
}
export interface Conn extends Reader, Writer, Closer {
/** The local address of the connection. */
readonly localAddr: Addr;
/** The remote address of the connection. */
readonly remoteAddr: Addr;
/** The resource ID of the connection. */
readonly rid: number;
/** Shuts down (`shutdown(2)`) the writing side of the TCP connection. Most
* callers should just use `close()`.
*
* **Unstable** because of lack of testing and because Deno.shutdown is also
* unstable.
* */
closeWrite(): void;
}
export interface ListenOptions {
/** The port to listen on. */
port: number;
/** A literal IP address or host name that can be resolved to an IP address.
* If not specified, defaults to `0.0.0.0`. */
hostname?: string;
}
/** Listen announces on the local transport address.
*
* ```ts
* const listener1 = Deno.listen({ port: 80 })
* const listener2 = Deno.listen({ hostname: "192.0.2.1", port: 80 })
* const listener3 = Deno.listen({ hostname: "[2001:db8::1]", port: 80 });
* const listener4 = Deno.listen({ hostname: "golang.org", port: 80, transport: "tcp" });
* ```
*
* Requires `allow-net` permission. */
export function listen(
options: ListenOptions & { transport?: "tcp" }
): Listener;
export interface ListenTlsOptions extends ListenOptions {
/** Server certificate file. */
certFile: string;
/** Server public key file. */
keyFile: string;
transport?: "tcp";
}
/** Listen announces on the local transport address over TLS (transport layer
* security).
*
* ```ts
* const lstnr = Deno.listenTls({ port: 443, certFile: "./server.crt", keyFile: "./server.key" });
* ```
*
* Requires `allow-net` permission. */
export function listenTls(options: ListenTlsOptions): Listener;
export interface ConnectOptions {
/** The port to connect to. */
port: number;
/** A literal IP address or host name that can be resolved to an IP address.
* If not specified, defaults to `127.0.0.1`. */
hostname?: string;
transport?: "tcp";
}
/**
* Connects to the hostname (default is "127.0.0.1") and port on the named
* transport (default is "tcp"), and resolves to the connection (`Conn`).
*
* ```ts
* const conn1 = await Deno.connect({ port: 80 });
* const conn2 = await Deno.connect({ hostname: "192.0.2.1", port: 80 });
* const conn3 = await Deno.connect({ hostname: "[2001:db8::1]", port: 80 });
* const conn4 = await Deno.connect({ hostname: "golang.org", port: 80, transport: "tcp" });
* ```
*
* Requires `allow-net` permission for "tcp". */
export function connect(options: ConnectOptions): Promise;
export interface ConnectTlsOptions {
/** The port to connect to. */
port: number;
/** A literal IP address or host name that can be resolved to an IP address.
* If not specified, defaults to `127.0.0.1`. */
hostname?: string;
/** Server certificate file. */
certFile?: string;
}
/** Establishes a secure connection over TLS (transport layer security) using
* an optional cert file, hostname (default is "127.0.0.1") and port. The
* cert file is optional and if not included Mozilla's root certificates will
* be used (see also https://github.com/ctz/webpki-roots for specifics)
*
* ```ts
* const conn1 = await Deno.connectTls({ port: 80 });
* const conn2 = await Deno.connectTls({ certFile: "./certs/my_custom_root_CA.pem", hostname: "192.0.2.1", port: 80 });
* const conn3 = await Deno.connectTls({ hostname: "[2001:db8::1]", port: 80 });
* const conn4 = await Deno.connectTls({ certFile: "./certs/my_custom_root_CA.pem", hostname: "golang.org", port: 80});
* ```
*
* Requires `allow-net` permission.
*/
export function connectTls(options: ConnectTlsOptions): Promise;
export interface Metrics {
opsDispatched: number;
opsDispatchedSync: number;
opsDispatchedAsync: number;
opsDispatchedAsyncUnref: number;
opsCompleted: number;
opsCompletedSync: number;
opsCompletedAsync: number;
opsCompletedAsyncUnref: number;
bytesSentControl: number;
bytesSentData: number;
bytesReceived: number;
}
/** Receive metrics from the privileged side of Deno. This is primarily used
* in the development of Deno. 'Ops', also called 'bindings', are the go-between
* between Deno JavaScript and Deno Rust.
*
* > console.table(Deno.metrics())
* ┌─────────────────────────┬────────┐
* │ (index) │ Values │
* ├─────────────────────────┼────────┤
* │ opsDispatched │ 3 │
* │ opsDispatchedSync │ 2 │
* │ opsDispatchedAsync │ 1 │
* │ opsDispatchedAsyncUnref │ 0 │
* │ opsCompleted │ 3 │
* │ opsCompletedSync │ 2 │
* │ opsCompletedAsync │ 1 │
* │ opsCompletedAsyncUnref │ 0 │
* │ bytesSentControl │ 73 │
* │ bytesSentData │ 0 │
* │ bytesReceived │ 375 │
* └─────────────────────────┴────────┘
*/
export function metrics(): Metrics;
interface ResourceMap {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
[rid: number]: any;
}
/** Returns a map of open resource ids (rid) along with their string
* representations. This is an internal API and as such resource
* representation has `any` type; that means it can change any time.
*
* ```ts
* console.log(Deno.resources());
* // { 0: "stdin", 1: "stdout", 2: "stderr" }
* Deno.openSync('../test.file');
* console.log(Deno.resources());
* // { 0: "stdin", 1: "stdout", 2: "stderr", 3: "fsFile" }
* ```
*/
export function resources(): ResourceMap;
export interface FsEvent {
kind: "any" | "access" | "create" | "modify" | "remove";
paths: string[];
}
/** Watch for file system events against one or more `paths`, which can be files
* or directories. These paths must exist already. One user action (e.g.
* `touch test.file`) can generate multiple file system events. Likewise,
* one user action can result in multiple file paths in one event (e.g. `mv
* old_name.txt new_name.txt`). Recursive option is `true` by default and,
* for directories, will watch the specified directory and all sub directories.
* Note that the exact ordering of the events can vary between operating systems.
*
* ```ts
* const watcher = Deno.watchFs("/");
* for await (const event of watcher) {
* console.log(">>>> event", event);
* // { kind: "create", paths: [ "/foo.txt" ] }
* }
*```
*
* Requires `allow-read` permission.
*/
export function watchFs(
paths: string | string[],
options?: { recursive: boolean }
): AsyncIterableIterator;
export class Process {
readonly rid: number;
readonly pid: number;
readonly stdin?: Writer & Closer;
readonly stdout?: Reader & Closer;
readonly stderr?: Reader & Closer;
/** Resolves to the current status of the process. */
status(): Promise;
/** Buffer the stdout until EOF and return it as `Uint8Array`.
*
* You must set stdout to `"piped"` when creating the process.
*
* This calls `close()` on stdout after its done. */
output(): Promise;
/** Buffer the stderr until EOF and return it as `Uint8Array`.
*
* You must set stderr to `"piped"` when creating the process.
*
* This calls `close()` on stderr after its done. */
stderrOutput(): Promise;
close(): void;
/** **UNSTABLE**: The `signo` argument may change to require the Deno.Signal
* enum.
*
* Send a signal to process. This functionality currently only works on
* Linux and Mac OS.
*/
kill(signo: number): void;
}
export type ProcessStatus =
| {
success: true;
code: 0;
signal?: undefined;
}
| {
success: false;
code: number;
signal?: number;
};
export interface RunOptions {
/** Arguments to pass. Note, the first element needs to be a path to the
* binary */
cmd: string[];
cwd?: string;
env?: {
[key: string]: string;
};
stdout?: "inherit" | "piped" | "null" | number;
stderr?: "inherit" | "piped" | "null" | number;
stdin?: "inherit" | "piped" | "null" | number;
}
/** Spawns new subprocess. RunOptions must contain at a minimum the `opt.cmd`,
* an array of program arguments, the first of which is the binary.
*
* ```ts
* const p = Deno.run({
* cmd: ["echo", "hello"],
* });
* ```
*
* Subprocess uses same working directory as parent process unless `opt.cwd`
* is specified.
*
* Environmental variables for subprocess can be specified using `opt.env`
* mapping.
*
* By default subprocess inherits stdio of parent process. To change that
* `opt.stdout`, `opt.stderr` and `opt.stdin` can be specified independently -
* they can be set to either an rid of open file or set to "inherit" "piped"
* or "null":
*
* `"inherit"` The default if unspecified. The child inherits from the
* corresponding parent descriptor.
*
* `"piped"` A new pipe should be arranged to connect the parent and child
* sub-processes.
*
* `"null"` This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*
* Details of the spawned process are returned.
*
* Requires `allow-run` permission. */
export function run(opt: RunOptions): Process;
interface InspectOptions {
depth?: number;
}
/** Converts the input into a string that has the same format as printed by
* `console.log()`.
*
* ```ts
* const obj = {};
* obj.propA = 10;
* obj.propB = "hello";
* const objAsString = Deno.inspect(obj); // { propA: 10, propB: "hello" }
* console.log(obj); // prints same value as objAsString, e.g. { propA: 10, propB: "hello" }
* ```
*
* You can also register custom inspect functions, via the `customInspect` Deno
* symbol on objects, to control and customize the output.
*
* ```ts
* class A {
* x = 10;
* y = "hello";
* [Deno.customInspect](): string {
* return "x=" + this.x + ", y=" + this.y;
* }
* }
* ```
*
* const inStringFormat = Deno.inspect(new A()); // "x=10, y=hello"
* console.log(inStringFormat); // prints "x=10, y=hello"
*
* Finally, a number of output options are also available.
*
* const out = Deno.inspect(obj, {showHidden: true, depth: 4, colors: true, indentLevel: 2});
*
*/
export function inspect(value: unknown, options?: InspectOptions): string;
/** Build related information. */
export const build: {
/** The LLVM target triple */
target: string;
/** Instruction set architecture */
arch: "x86_64";
/** Operating system */
os: "darwin" | "linux" | "windows";
/** Computer vendor */
vendor: string;
/** Optional environment */
env?: string;
};
interface Version {
deno: string;
v8: string;
typescript: string;
}
/** Version related information. */
export const version: Version;
/** Returns the script arguments to the program. If for example we run a
* program:
*
* deno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd
*
* Then `Deno.args` will contain:
*
* [ "/etc/passwd" ]
*/
export const args: string[];
/** A symbol which can be used as a key for a custom method which will be
* called when `Deno.inspect()` is called, or when the object is logged to
* the console. */
export const customInspect: unique symbol;
}
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, no-var */
///
///
// This follows the WebIDL at: https://webassembly.github.io/spec/js-api/
// and: https://webassembly.github.io/spec/web-api/
declare namespace WebAssembly {
interface WebAssemblyInstantiatedSource {
module: Module;
instance: Instance;
}
/** Compiles a `WebAssembly.Module` from WebAssembly binary code. This
* function is useful if it is necessary to a compile a module before it can
* be instantiated (otherwise, the `WebAssembly.instantiate()` function
* should be used). */
function compile(bufferSource: BufferSource): Promise;
/** Compiles a `WebAssembly.Module` directly from a streamed underlying
* source. This function is useful if it is necessary to a compile a module
* before it can be instantiated (otherwise, the
* `WebAssembly.instantiateStreaming()` function should be used). */
function compileStreaming(source: Promise): Promise;
/** Takes the WebAssembly binary code, in the form of a typed array or
* `ArrayBuffer`, and performs both compilation and instantiation in one step.
* The returned `Promise` resolves to both a compiled `WebAssembly.Module` and
* its first `WebAssembly.Instance`. */
function instantiate(
bufferSource: BufferSource,
importObject?: object
): Promise;
/** Takes an already-compiled `WebAssembly.Module` and returns a `Promise`
* that resolves to an `Instance` of that `Module`. This overload is useful if
* the `Module` has already been compiled. */
function instantiate(
module: Module,
importObject?: object
): Promise;
/** Compiles and instantiates a WebAssembly module directly from a streamed
* underlying source. This is the most efficient, optimized way to load wasm
* code. */
function instantiateStreaming(
source: Promise,
importObject?: object
): Promise;
/** Validates a given typed array of WebAssembly binary code, returning
* whether the bytes form a valid wasm module (`true`) or not (`false`). */
function validate(bufferSource: BufferSource): boolean;
type ImportExportKind = "function" | "table" | "memory" | "global";
interface ModuleExportDescriptor {
name: string;
kind: ImportExportKind;
}
interface ModuleImportDescriptor {
module: string;
name: string;
kind: ImportExportKind;
}
class Module {
constructor(bufferSource: BufferSource);
/** Given a `Module` and string, returns a copy of the contents of all
* custom sections in the module with the given string name. */
static customSections(
moduleObject: Module,
sectionName: string
): ArrayBuffer;
/** Given a `Module`, returns an array containing descriptions of all the
* declared exports. */
static exports(moduleObject: Module): ModuleExportDescriptor[];
/** Given a `Module`, returns an array containing descriptions of all the
* declared imports. */
static imports(moduleObject: Module): ModuleImportDescriptor[];
}
class Instance {
constructor(module: Module, importObject?: object);
/** An object containing as its members all the functions exported from the
* WebAssembly module instance, to allow them to be accessed and used by
* JavaScript. */
readonly exports: T;
}
interface MemoryDescriptor {
initial: number;
maximum?: number;
}
class Memory {
constructor(descriptor: MemoryDescriptor);
/** An accessor property that returns the buffer contained in the memory. */
readonly buffer: ArrayBuffer;
/** Increases the size of the memory instance by a specified number of
* WebAssembly pages (each one is 64KB in size). */
grow(delta: number): number;
}
type TableKind = "anyfunc";
interface TableDescriptor {
element: TableKind;
initial: number;
maximum?: number;
}
class Table {
constructor(descriptor: TableDescriptor);
/** Returns the length of the table, i.e. the number of elements. */
readonly length: number;
/** Accessor function — gets the element stored at a given index. */
get(index: number): (...args: any[]) => any;
/** Increases the size of the Table instance by a specified number of
* elements. */
grow(delta: number): number;
/** Sets an element stored at a given index to a given value. */
set(index: number, value: (...args: any[]) => any): void;
}
type ValueType = "i32" | "i64" | "f32" | "f64";
interface GlobalDescriptor {
value: ValueType;
mutable?: boolean;
}
/** Represents a global variable instance, accessible from both JavaScript and
* importable/exportable across one or more `WebAssembly.Module` instances.
* This allows dynamic linking of multiple modules. */
class Global {
constructor(descriptor: GlobalDescriptor, value?: any);
/** Old-style method that returns the value contained inside the global
* variable. */
valueOf(): any;
/** The value contained inside the global variable — this can be used to
* directly set and get the global's value. */
value: any;
}
/** Indicates an error during WebAssembly decoding or validation */
class CompileError extends Error {
constructor(message: string, fileName?: string, lineNumber?: string);
}
/** Indicates an error during module instantiation (besides traps from the
* start function). */
class LinkError extends Error {
constructor(message: string, fileName?: string, lineNumber?: string);
}
/** Is thrown whenever WebAssembly specifies a trap. */
class RuntimeError extends Error {
constructor(message: string, fileName?: string, lineNumber?: string);
}
}
/** Sets a timer which executes a function once after the timer expires. Returns
* an id which may be used to cancel the timeout.
*
* setTimeout(() => { console.log('hello'); }, 500);
*/
declare function setTimeout(
/** callback function to execute when timer expires */
cb: (...args: any[]) => void,
/** delay in ms */
delay?: number,
/** arguments passed to callback function */
...args: any[]
): number;
/** Repeatedly calls a function , with a fixed time delay between each call.
*
* // Outputs 'hello' to the console every 500ms
* setInterval(() => { console.log('hello'); }, 500);
*/
declare function setInterval(
/** callback function to execute when timer expires */
cb: (...args: any[]) => void,
/** delay in ms */
delay?: number,
/** arguments passed to callback function */
...args: any[]
): number;
/** Cancels a timed, repeating action which was previously started by a call
* to `setInterval()`
*
* const id = setInterval(()= > {console.log('hello');}, 500);
* ...
* clearInterval(id);
*/
declare function clearInterval(id?: number): void;
/** Cancels a scheduled action initiated by `setTimeout()`
*
* const id = setTimeout(()= > {console.log('hello');}, 500);
* ...
* clearTimeout(id);
*/
declare function clearTimeout(id?: number): void;
/** A microtask is a short function which is executed after the function or
* module which created it exits and only if the JavaScript execution stack is
* empty, but before returning control to the event loop being used to drive the
* script's execution environment. This event loop may be either the main event
* loop or the event loop driving a web worker.
*
* queueMicrotask(() => { console.log('This event loop stack is complete'); });
*/
declare function queueMicrotask(func: Function): void;
declare var console: Console;
declare var crypto: Crypto;
/** Registers an event listener in the global scope, which will be called
* synchronously whenever the event `type` is dispatched.
*
* addEventListener('unload', () => { console.log('All finished!'); });
* ...
* dispatchEvent(new Event('unload'));
*/
declare function addEventListener(
type: string,
callback: EventListenerOrEventListenerObject | null,
options?: boolean | AddEventListenerOptions | undefined
): void;
/** Dispatches an event in the global scope, synchronously invoking any
* registered event listeners for this event in the appropriate order. Returns
* false if event is cancelable and at least one of the event handlers which
* handled this event called Event.preventDefault(). Otherwise it returns true.
*
* dispatchEvent(new Event('unload'));
*/
declare function dispatchEvent(event: Event): boolean;
/** Remove a previously registered event listener from the global scope
*
* const lstnr = () => { console.log('hello'); };
* addEventListener('load', lstnr);
* removeEventListener('load', lstnr);
*/
declare function removeEventListener(
type: string,
callback: EventListenerOrEventListenerObject | null,
options?: boolean | EventListenerOptions | undefined
): void;
declare interface ImportMeta {
url: string;
main: boolean;
}
interface DomIterable {
keys(): IterableIterator;
values(): IterableIterator;
entries(): IterableIterator<[K, V]>;
[Symbol.iterator](): IterableIterator<[K, V]>;
forEach(
callback: (value: V, key: K, parent: this) => void,
thisArg?: any
): void;
}
interface ReadableStreamReadDoneResult {
done: true;
value?: T;
}
interface ReadableStreamReadValueResult {
done: false;
value: T;
}
type ReadableStreamReadResult =
| ReadableStreamReadValueResult
| ReadableStreamReadDoneResult;
interface ReadableStreamDefaultReader {
readonly closed: Promise;
cancel(reason?: any): Promise;
read(): Promise>;
releaseLock(): void;
}
interface ReadableStreamReader {
cancel(): Promise;
read(): Promise>;
releaseLock(): void;
}
interface ReadableByteStreamControllerCallback {
(controller: ReadableByteStreamController): void | PromiseLike;
}
interface UnderlyingByteSource {
autoAllocateChunkSize?: number;
cancel?: ReadableStreamErrorCallback;
pull?: ReadableByteStreamControllerCallback;
start?: ReadableByteStreamControllerCallback;
type: "bytes";
}
interface UnderlyingSource {
cancel?: ReadableStreamErrorCallback;
pull?: ReadableStreamDefaultControllerCallback;
start?: ReadableStreamDefaultControllerCallback;
type?: undefined;
}
interface ReadableStreamErrorCallback {
(reason: any): void | PromiseLike;
}
interface ReadableStreamDefaultControllerCallback {
(controller: ReadableStreamDefaultController): void | PromiseLike;
}
interface ReadableStreamDefaultController {
readonly desiredSize: number | null;
close(): void;
enqueue(chunk: R): void;
error(error?: any): void;
}
interface ReadableByteStreamController {
readonly byobRequest: undefined;
readonly desiredSize: number | null;
close(): void;
enqueue(chunk: ArrayBufferView): void;
error(error?: any): void;
}
interface PipeOptions {
preventAbort?: boolean;
preventCancel?: boolean;
preventClose?: boolean;
signal?: AbortSignal;
}
interface QueuingStrategySizeCallback {
(chunk: T): number;
}
interface QueuingStrategy {
highWaterMark?: number;
size?: QueuingStrategySizeCallback;
}
/** This Streams API interface provides a built-in byte length queuing strategy
* that can be used when constructing streams. */
declare class CountQueuingStrategy implements QueuingStrategy {
constructor(options: { highWaterMark: number });
highWaterMark: number;
size(chunk: any): 1;
}
declare class ByteLengthQueuingStrategy
implements QueuingStrategy {
constructor(options: { highWaterMark: number });
highWaterMark: number;
size(chunk: ArrayBufferView): number;
}
/** This Streams API interface represents a readable stream of byte data. The
* Fetch API offers a concrete instance of a ReadableStream through the body
* property of a Response object. */
interface ReadableStream {
readonly locked: boolean;
cancel(reason?: any): Promise;
getIterator(options?: { preventCancel?: boolean }): AsyncIterableIterator;
// getReader(options: { mode: "byob" }): ReadableStreamBYOBReader;
getReader(): ReadableStreamDefaultReader;
pipeThrough(
{
writable,
readable,
}: {
writable: WritableStream;
readable: ReadableStream;
},
options?: PipeOptions
): ReadableStream;
pipeTo(dest: WritableStream, options?: PipeOptions): Promise;
tee(): [ReadableStream, ReadableStream];
[Symbol.asyncIterator](options?: {
preventCancel?: boolean;
}): AsyncIterableIterator;
}
declare var ReadableStream: {
prototype: ReadableStream;
new (
underlyingSource: UnderlyingByteSource,
strategy?: { highWaterMark?: number; size?: undefined }
): ReadableStream;
new (
underlyingSource?: UnderlyingSource,
strategy?: QueuingStrategy
): ReadableStream;
};
interface WritableStreamDefaultControllerCloseCallback {
(): void | PromiseLike;
}
interface WritableStreamDefaultControllerStartCallback {
(controller: WritableStreamDefaultController): void | PromiseLike;
}
interface WritableStreamDefaultControllerWriteCallback {
(chunk: W, controller: WritableStreamDefaultController): void | PromiseLike<
void
>;
}
interface WritableStreamErrorCallback {
(reason: any): void | PromiseLike;
}
interface UnderlyingSink {
abort?: WritableStreamErrorCallback;
close?: WritableStreamDefaultControllerCloseCallback;
start?: WritableStreamDefaultControllerStartCallback;
type?: undefined;
write?: WritableStreamDefaultControllerWriteCallback;
}
/** This Streams API interface provides a standard abstraction for writing
* streaming data to a destination, known as a sink. This object comes with
* built-in backpressure and queuing. */
declare class WritableStream {
constructor(
underlyingSink?: UnderlyingSink,
strategy?: QueuingStrategy
);
readonly locked: boolean;
abort(reason?: any): Promise;
close(): Promise;
getWriter(): WritableStreamDefaultWriter;
}
/** This Streams API interface represents a controller allowing control of a
* WritableStream's state. When constructing a WritableStream, the underlying
* sink is given a corresponding WritableStreamDefaultController instance to
* manipulate. */
interface WritableStreamDefaultController {
error(error?: any): void;
}
/** This Streams API interface is the object returned by
* WritableStream.getWriter() and once created locks the < writer to the
* WritableStream ensuring that no other streams can write to the underlying
* sink. */
interface WritableStreamDefaultWriter {
readonly closed: Promise;
readonly desiredSize: number | null;
readonly ready: Promise;
abort(reason?: any): Promise;
close(): Promise;
releaseLock(): void;
write(chunk: W): Promise;
}
declare class TransformStream {
constructor(
transformer?: Transformer,
writableStrategy?: QueuingStrategy,
readableStrategy?: QueuingStrategy
);
readonly readable: ReadableStream;
readonly writable: WritableStream;
}
interface TransformStreamDefaultController {
readonly desiredSize: number | null;
enqueue(chunk: O): void;
error(reason?: any): void;
terminate(): void;
}
interface Transformer {
flush?: TransformStreamDefaultControllerCallback;
readableType?: undefined;
start?: TransformStreamDefaultControllerCallback;
transform?: TransformStreamDefaultControllerTransformCallback;
writableType?: undefined;
}
interface TransformStreamDefaultControllerCallback {
(controller: TransformStreamDefaultController): void | PromiseLike;
}
interface TransformStreamDefaultControllerTransformCallback {
(
chunk: I,
controller: TransformStreamDefaultController
): void | PromiseLike;
}
interface DOMStringList {
/** Returns the number of strings in strings. */
readonly length: number;
/** Returns true if strings contains string, and false otherwise. */
contains(string: string): boolean;
/** Returns the string with index index from strings. */
item(index: number): string | null;
[index: number]: string;
}
declare class DOMException extends Error {
constructor(message?: string, name?: string);
readonly name: string;
readonly message: string;
}
type BufferSource = ArrayBufferView | ArrayBuffer;
type BlobPart = BufferSource | Blob | string;
interface BlobPropertyBag {
type?: string;
ending?: "transparent" | "native";
}
/** A file-like object of immutable, raw data. Blobs represent data that isn't necessarily in a JavaScript-native format. The File interface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system. */
interface Blob {
readonly size: number;
readonly type: string;
arrayBuffer(): Promise;
slice(start?: number, end?: number, contentType?: string): Blob;
stream(): ReadableStream;
text(): Promise;
}
declare const Blob: {
prototype: Blob;
new (blobParts?: BlobPart[], options?: BlobPropertyBag): Blob;
};
interface FilePropertyBag extends BlobPropertyBag {
lastModified?: number;
}
/** Provides information about files and allows JavaScript in a web page to
* access their content. */
interface File extends Blob {
readonly lastModified: number;
readonly name: string;
}
declare const File: {
prototype: File;
new (fileBits: BlobPart[], fileName: string, options?: FilePropertyBag): File;
};
declare const isConsoleInstance: unique symbol;
declare class Console {
indentLevel: number;
[isConsoleInstance]: boolean;
/** Writes the arguments to stdout */
log: (...args: unknown[]) => void;
/** Writes the arguments to stdout */
debug: (...args: unknown[]) => void;
/** Writes the arguments to stdout */
info: (...args: unknown[]) => void;
/** Writes the properties of the supplied `obj` to stdout */
dir: (
obj: unknown,
options?: Partial<{
depth: number;
indentLevel: number;
}>
) => void;
/** From MDN:
* Displays an interactive tree of the descendant elements of
* the specified XML/HTML element. If it is not possible to display
* as an element the JavaScript Object view is shown instead.
* The output is presented as a hierarchical listing of expandable
* nodes that let you see the contents of child nodes.
*
* Since we write to stdout, we can't display anything interactive
* we just fall back to `console.dir`.
*/
dirxml: (
obj: unknown,
options?: Partial<{
showHidden: boolean;
depth: number;
colors: boolean;
indentLevel: number;
}>
) => void;
/** Writes the arguments to stdout */
warn: (...args: unknown[]) => void;
/** Writes the arguments to stdout */
error: (...args: unknown[]) => void;
/** Writes an error message to stdout if the assertion is `false`. If the
* assertion is `true`, nothing happens.
*
* ref: https://console.spec.whatwg.org/#assert
*/
assert: (condition?: boolean, ...args: unknown[]) => void;
count: (label?: string) => void;
countReset: (label?: string) => void;
table: (data: unknown, properties?: string[] | undefined) => void;
time: (label?: string) => void;
timeLog: (label?: string, ...args: unknown[]) => void;
timeEnd: (label?: string) => void;
group: (...label: unknown[]) => void;
groupCollapsed: (...label: unknown[]) => void;
groupEnd: () => void;
clear: () => void;
trace: (...args: unknown[]) => void;
static [Symbol.hasInstance](instance: Console): boolean;
}
declare interface Crypto {
readonly subtle: null;
getRandomValues<
T extends
| Int8Array
| Int16Array
| Int32Array
| Uint8Array
| Uint16Array
| Uint32Array
| Uint8ClampedArray
| Float32Array
| Float64Array
| DataView
| null
>(
array: T
): T;
}
type FormDataEntryValue = File | string;
/** Provides a way to easily construct a set of key/value pairs representing
* form fields and their values, which can then be easily sent using the
* XMLHttpRequest.send() method. It uses the same format a form would use if the
* encoding type were set to "multipart/form-data". */
interface FormData extends DomIterable {
append(name: string, value: string | Blob, fileName?: string): void;
delete(name: string): void;
get(name: string): FormDataEntryValue | null;
getAll(name: string): FormDataEntryValue[];
has(name: string): boolean;
set(name: string, value: string | Blob, fileName?: string): void;
}
declare const FormData: {
prototype: FormData;
// TODO(ry) FormData constructor is non-standard.
// new(form?: HTMLFormElement): FormData;
new (): FormData;
};
interface Body {
/** A simple getter used to expose a `ReadableStream` of the body contents. */
readonly body: ReadableStream | null;
/** Stores a `Boolean` that declares whether the body has been used in a
* response yet.
*/
readonly bodyUsed: boolean;
/** Takes a `Response` stream and reads it to completion. It returns a promise
* that resolves with an `ArrayBuffer`.
*/
arrayBuffer(): Promise;
/** Takes a `Response` stream and reads it to completion. It returns a promise
* that resolves with a `Blob`.
*/
blob(): Promise;
/** Takes a `Response` stream and reads it to completion. It returns a promise
* that resolves with a `FormData` object.
*/
formData(): Promise;
/** Takes a `Response` stream and reads it to completion. It returns a promise
* that resolves with the result of parsing the body text as JSON.
*/
json(): Promise;
/** Takes a `Response` stream and reads it to completion. It returns a promise
* that resolves with a `USVString` (text).
*/
text(): Promise;
}
type HeadersInit = Headers | string[][] | Record;
/** This Fetch API interface allows you to perform various actions on HTTP
* request and response headers. These actions include retrieving, setting,
* adding to, and removing. A Headers object has an associated header list,
* which is initially empty and consists of zero or more name and value pairs.
* You can add to this using methods like append() (see Examples.) In all
* methods of this interface, header names are matched by case-insensitive byte
* sequence. */
interface Headers {
append(name: string, value: string): void;
delete(name: string): void;
get(name: string): string | null;
has(name: string): boolean;
set(name: string, value: string): void;
forEach(
callbackfn: (value: string, key: string, parent: Headers) => void,
thisArg?: any
): void;
}
interface Headers extends DomIterable {
/** Appends a new value onto an existing header inside a `Headers` object, or
* adds the header if it does not already exist.
*/
append(name: string, value: string): void;
/** Deletes a header from a `Headers` object. */
delete(name: string): void;
/** Returns an iterator allowing to go through all key/value pairs
* contained in this Headers object. The both the key and value of each pairs
* are ByteString objects.
*/
entries(): IterableIterator<[string, string]>;
/** Returns a `ByteString` sequence of all the values of a header within a
* `Headers` object with a given name.
*/
get(name: string): string | null;
/** Returns a boolean stating whether a `Headers` object contains a certain
* header.
*/
has(name: string): boolean;
/** Returns an iterator allowing to go through all keys contained in
* this Headers object. The keys are ByteString objects.
*/
keys(): IterableIterator;
/** Sets a new value for an existing header inside a Headers object, or adds
* the header if it does not already exist.
*/
set(name: string, value: string): void;
/** Returns an iterator allowing to go through all values contained in
* this Headers object. The values are ByteString objects.
*/
values(): IterableIterator;
forEach(
callbackfn: (value: string, key: string, parent: this) => void,
thisArg?: any
): void;
/** The Symbol.iterator well-known symbol specifies the default
* iterator for this Headers object
*/
[Symbol.iterator](): IterableIterator<[string, string]>;
}
declare const Headers: {
prototype: Headers;
new (init?: HeadersInit): Headers;
};
type RequestInfo = Request | string;
type RequestCache =
| "default"
| "force-cache"
| "no-cache"
| "no-store"
| "only-if-cached"
| "reload";
type RequestCredentials = "include" | "omit" | "same-origin";
type RequestMode = "cors" | "navigate" | "no-cors" | "same-origin";
type RequestRedirect = "error" | "follow" | "manual";
type ReferrerPolicy =
| ""
| "no-referrer"
| "no-referrer-when-downgrade"
| "origin"
| "origin-when-cross-origin"
| "same-origin"
| "strict-origin"
| "strict-origin-when-cross-origin"
| "unsafe-url";
type BodyInit =
| Blob
| BufferSource
| FormData
| URLSearchParams
| ReadableStream
| string;
type RequestDestination =
| ""
| "audio"
| "audioworklet"
| "document"
| "embed"
| "font"
| "image"
| "manifest"
| "object"
| "paintworklet"
| "report"
| "script"
| "sharedworker"
| "style"
| "track"
| "video"
| "worker"
| "xslt";
interface RequestInit {
/**
* A BodyInit object or null to set request's body.
*/
body?: BodyInit | null;
/**
* A string indicating how the request will interact with the browser's cache
* to set request's cache.
*/
cache?: RequestCache;
/**
* A string indicating whether credentials will be sent with the request
* always, never, or only when sent to a same-origin URL. Sets request's
* credentials.
*/
credentials?: RequestCredentials;
/**
* A Headers object, an object literal, or an array of two-item arrays to set
* request's headers.
*/
headers?: HeadersInit;
/**
* A cryptographic hash of the resource to be fetched by request. Sets
* request's integrity.
*/
integrity?: string;
/**
* A boolean to set request's keepalive.
*/
keepalive?: boolean;
/**
* A string to set request's method.
*/
method?: string;
/**
* A string to indicate whether the request will use CORS, or will be
* restricted to same-origin URLs. Sets request's mode.
*/
mode?: RequestMode;
/**
* A string indicating whether request follows redirects, results in an error
* upon encountering a redirect, or returns the redirect (in an opaque
* fashion). Sets request's redirect.
*/
redirect?: RequestRedirect;
/**
* A string whose value is a same-origin URL, "about:client", or the empty
* string, to set request's referrer.
*/
referrer?: string;
/**
* A referrer policy to set request's referrerPolicy.
*/
referrerPolicy?: ReferrerPolicy;
/**
* An AbortSignal to set request's signal.
*/
signal?: AbortSignal | null;
/**
* Can only be null. Used to disassociate request from any Window.
*/
window?: any;
}
/** This Fetch API interface represents a resource request. */
interface Request extends Body {
/**
* Returns the cache mode associated with request, which is a string
* indicating how the request will interact with the browser's cache when
* fetching.
*/
readonly cache: RequestCache;
/**
* Returns the credentials mode associated with request, which is a string
* indicating whether credentials will be sent with the request always, never,
* or only when sent to a same-origin URL.
*/
readonly credentials: RequestCredentials;
/**
* Returns the kind of resource requested by request, e.g., "document" or "script".
*/
readonly destination: RequestDestination;
/**
* Returns a Headers object consisting of the headers associated with request.
* Note that headers added in the network layer by the user agent will not be
* accounted for in this object, e.g., the "Host" header.
*/
readonly headers: Headers;
/**
* Returns request's subresource integrity metadata, which is a cryptographic
* hash of the resource being fetched. Its value consists of multiple hashes
* separated by whitespace. [SRI]
*/
readonly integrity: string;
/**
* Returns a boolean indicating whether or not request is for a history
* navigation (a.k.a. back-forward navigation).
*/
readonly isHistoryNavigation: boolean;
/**
* Returns a boolean indicating whether or not request is for a reload
* navigation.
*/
readonly isReloadNavigation: boolean;
/**
* Returns a boolean indicating whether or not request can outlive the global
* in which it was created.
*/
readonly keepalive: boolean;
/**
* Returns request's HTTP method, which is "GET" by default.
*/
readonly method: string;
/**
* Returns the mode associated with request, which is a string indicating
* whether the request will use CORS, or will be restricted to same-origin
* URLs.
*/
readonly mode: RequestMode;
/**
* Returns the redirect mode associated with request, which is a string
* indicating how redirects for the request will be handled during fetching. A
* request will follow redirects by default.
*/
readonly redirect: RequestRedirect;
/**
* Returns the referrer of request. Its value can be a same-origin URL if
* explicitly set in init, the empty string to indicate no referrer, and
* "about:client" when defaulting to the global's default. This is used during
* fetching to determine the value of the `Referer` header of the request
* being made.
*/
readonly referrer: string;
/**
* Returns the referrer policy associated with request. This is used during
* fetching to compute the value of the request's referrer.
*/
readonly referrerPolicy: ReferrerPolicy;
/**
* Returns the signal associated with request, which is an AbortSignal object
* indicating whether or not request has been aborted, and its abort event
* handler.
*/
readonly signal: AbortSignal;
/**
* Returns the URL of request as a string.
*/
readonly url: string;
clone(): Request;
}
declare const Request: {
prototype: Request;
new (input: RequestInfo, init?: RequestInit): Request;
};
interface ResponseInit {
headers?: HeadersInit;
status?: number;
statusText?: string;
}
type ResponseType =
| "basic"
| "cors"
| "default"
| "error"
| "opaque"
| "opaqueredirect";
/** This Fetch API interface represents the response to a request. */
interface Response extends Body {
readonly headers: Headers;
readonly ok: boolean;
readonly redirected: boolean;
readonly status: number;
readonly statusText: string;
readonly trailer: Promise;
readonly type: ResponseType;
readonly url: string;
clone(): Response;
}
declare const Response: {
prototype: Response;
new (body?: BodyInit | null, init?: ResponseInit): Response;
error(): Response;
redirect(url: string, status?: number): Response;
};
/** Fetch a resource from the network. It returns a Promise that resolves to the
* Response to that request, whether it is successful or not.
*
* const response = await fetch("http://my.json.host/data.json");
* console.log(response.status); // e.g. 200
* console.log(response.statusText); // e.g. "OK"
* const jsonData = await response.json();
*/
declare function fetch(
input: Request | URL | string,
init?: RequestInit
): Promise;
/** Decodes a string of data which has been encoded using base-64 encoding.
*
* console.log(atob("aGVsbG8gd29ybGQ=")); // outputs 'hello world'
*/
declare function atob(s: string): string;
/** Creates a base-64 ASCII encoded string from the input string.
*
* console.log(btoa("hello world")); // outputs "aGVsbG8gd29ybGQ="
*/
declare function btoa(s: string): string;
declare class TextDecoder {
/** Returns encoding's name, lowercased. */
readonly encoding: string;
/** Returns `true` if error mode is "fatal", and `false` otherwise. */
readonly fatal: boolean;
/** Returns `true` if ignore BOM flag is set, and `false` otherwise. */
readonly ignoreBOM = false;
constructor(
label?: string,
options?: { fatal?: boolean; ignoreBOM?: boolean }
);
/** Returns the result of running encoding's decoder. */
decode(input?: BufferSource, options?: { stream?: false }): string;
readonly [Symbol.toStringTag]: string;
}
declare class TextEncoder {
/** Returns "utf-8". */
readonly encoding = "utf-8";
/** Returns the result of running UTF-8's encoder. */
encode(input?: string): Uint8Array;
encodeInto(
input: string,
dest: Uint8Array
): { read: number; written: number };
readonly [Symbol.toStringTag]: string;
}
interface URLSearchParams {
/** Appends a specified key/value pair as a new search parameter.
*
* ```ts
* let searchParams = new URLSearchParams();
* searchParams.append('name', 'first');
* searchParams.append('name', 'second');
* ```
*/
append(name: string, value: string): void;
/** Deletes the given search parameter and its associated value,
* from the list of all search parameters.
*
* ```ts
* let searchParams = new URLSearchParams([['name', 'value']]);
* searchParams.delete('name');
* ```
*/
delete(name: string): void;
/** Returns all the values associated with a given search parameter
* as an array.
*
* ```ts
* searchParams.getAll('name');
* ```
*/
getAll(name: string): string[];
/** Returns the first value associated to the given search parameter.
*
* ```ts
* searchParams.get('name');
* ```
*/
get(name: string): string | null;
/** Returns a Boolean that indicates whether a parameter with the
* specified name exists.
*
* ```ts
* searchParams.has('name');
* ```
*/
has(name: string): boolean;
/** Sets the value associated with a given search parameter to the
* given value. If there were several matching values, this method
* deletes the others. If the search parameter doesn't exist, this
* method creates it.
*
* ```ts
* searchParams.set('name', 'value');
* ```
*/
set(name: string, value: string): void;
/** Sort all key/value pairs contained in this object in place and
* return undefined. The sort order is according to Unicode code
* points of the keys.
*
* ```ts
* searchParams.sort();
* ```
*/
sort(): void;
/** Calls a function for each element contained in this object in
* place and return undefined. Optionally accepts an object to use
* as this when executing callback as second argument.
*
* ```ts
* const params = new URLSearchParams([["a", "b"], ["c", "d"]]);
* params.forEach((value, key, parent) => {
* console.log(value, key, parent);
* });
* ```
*
*/
forEach(
callbackfn: (value: string, key: string, parent: this) => void,
thisArg?: any
): void;
/** Returns an iterator allowing to go through all keys contained
* in this object.
*
* ```ts
* const params = new URLSearchParams([["a", "b"], ["c", "d"]]);
* for (const key of params.keys()) {
* console.log(key);
* }
* ```
*/
keys(): IterableIterator;
/** Returns an iterator allowing to go through all values contained
* in this object.
*
* ```ts
* const params = new URLSearchParams([["a", "b"], ["c", "d"]]);
* for (const value of params.values()) {
* console.log(value);
* }
* ```
*/
values(): IterableIterator;
/** Returns an iterator allowing to go through all key/value
* pairs contained in this object.
*
* ```ts
* const params = new URLSearchParams([["a", "b"], ["c", "d"]]);
* for (const [key, value] of params.entries()) {
* console.log(key, value);
* }
* ```
*/
entries(): IterableIterator<[string, string]>;
/** Returns an iterator allowing to go through all key/value
* pairs contained in this object.
*
* ```ts
* const params = new URLSearchParams([["a", "b"], ["c", "d"]]);
* for (const [key, value] of params) {
* console.log(key, value);
* }
* ```
*/
[Symbol.iterator](): IterableIterator<[string, string]>;
/** Returns a query string suitable for use in a URL.
*
* ```ts
* searchParams.toString();
* ```
*/
toString(): string;
}
declare const URLSearchParams: {
prototype: URLSearchParams;
new (
init?: string[][] | Record | string | URLSearchParams
): URLSearchParams;
toString(): string;
};
/** The URL interface represents an object providing static methods used for creating object URLs. */
interface URL {
hash: string;
host: string;
hostname: string;
href: string;
toString(): string;
readonly origin: string;
password: string;
pathname: string;
port: string;
protocol: string;
search: string;
readonly searchParams: URLSearchParams;
username: string;
toJSON(): string;
}
declare const URL: {
prototype: URL;
new (url: string | URL, base?: string | URL): URL;
createObjectURL(object: any): string;
revokeObjectURL(url: string): void;
};
interface MessageEventInit extends EventInit {
data?: any;
origin?: string;
lastEventId?: string;
}
declare class MessageEvent extends Event {
readonly data: any;
readonly origin: string;
readonly lastEventId: string;
constructor(type: string, eventInitDict?: MessageEventInit);
}
interface ErrorEventInit extends EventInit {
message?: string;
filename?: string;
lineno?: number;
colno?: number;
error?: any;
}
declare class ErrorEvent extends Event {
readonly message: string;
readonly filename: string;
readonly lineno: number;
readonly colno: number;
readonly error: any;
constructor(type: string, eventInitDict?: ErrorEventInit);
}
interface PostMessageOptions {
transfer?: any[];
}
declare class Worker extends EventTarget {
onerror?: (e: ErrorEvent) => void;
onmessage?: (e: MessageEvent) => void;
onmessageerror?: (e: MessageEvent) => void;
constructor(
specifier: string,
options?: {
type?: "classic" | "module";
name?: string;
/** UNSTABLE: New API. Expect many changes; most likely this
* field will be made into an object for more granular
* configuration of worker thread (permissions, import map, etc.).
*
* Set to `true` to make `Deno` namespace and all of its methods
* available to worker thread.
*
* Currently worker inherits permissions from main thread (permissions
* given using `--allow-*` flags).
* Configurable permissions are on the roadmap to be implemented.
*
* Example:
*
* ```ts
* // mod.ts
* const worker = new Worker("./deno_worker.ts", { type: "module", deno: true });
* worker.postMessage({ cmd: "readFile", fileName: "./log.txt" });
*
* // deno_worker.ts
*
*
* self.onmessage = async function (e) {
* const { cmd, fileName } = e.data;
* if (cmd !== "readFile") {
* throw new Error("Invalid command");
* }
* const buf = await Deno.readFile(fileName);
* const fileContents = new TextDecoder().decode(buf);
* console.log(fileContents);
* }
* ```
*
* // log.txt
* hello world
* hello world 2
*
* // run program
* $ deno run --allow-read mod.ts
* hello world
* hello world2
*
*/
deno?: boolean;
}
);
postMessage(message: any, transfer: ArrayBuffer[]): void;
postMessage(message: any, options?: PostMessageOptions): void;
terminate(): void;
}
declare namespace performance {
/** Returns a current time from Deno's start in milliseconds.
*
* Use the permission flag `--allow-hrtime` return a precise value.
*
* ```ts
* const t = performance.now();
* console.log(`${t} ms since start!`);
* ```
*/
export function now(): number;
}
interface EventInit {
bubbles?: boolean;
cancelable?: boolean;
composed?: boolean;
}
/** An event which takes place in the DOM. */
declare class Event {
constructor(type: string, eventInitDict?: EventInit);
/** Returns true or false depending on how event was initialized. True if
* event goes through its target's ancestors in reverse tree order, and
* false otherwise. */
readonly bubbles: boolean;
cancelBubble: boolean;
/** Returns true or false depending on how event was initialized. Its return
* value does not always carry meaning, but true can indicate that part of the
* operation during which event was dispatched, can be canceled by invoking
* the preventDefault() method. */
readonly cancelable: boolean;
/** Returns true or false depending on how event was initialized. True if
* event invokes listeners past a ShadowRoot node that is the root of its
* target, and false otherwise. */
readonly composed: boolean;
/** Returns the object whose event listener's callback is currently being
* invoked. */
readonly currentTarget: EventTarget | null;
/** Returns true if preventDefault() was invoked successfully to indicate
* cancellation, and false otherwise. */
readonly defaultPrevented: boolean;
/** Returns the event's phase, which is one of NONE, CAPTURING_PHASE,
* AT_TARGET, and BUBBLING_PHASE. */
readonly eventPhase: number;
/** Returns true if event was dispatched by the user agent, and false
* otherwise. */
readonly isTrusted: boolean;
/** Returns the object to which event is dispatched (its target). */
readonly target: EventTarget | null;
/** Returns the event's timestamp as the number of milliseconds measured
* relative to the time origin. */
readonly timeStamp: number;
/** Returns the type of event, e.g. "click", "hashchange", or "submit". */
readonly type: string;
/** Returns the invocation target objects of event's path (objects on which
* listeners will be invoked), except for any nodes in shadow trees of which
* the shadow root's mode is "closed" that are not reachable from event's
* currentTarget. */
composedPath(): EventTarget[];
/** If invoked when the cancelable attribute value is true, and while
* executing a listener for the event with passive set to false, signals to
* the operation that caused event to be dispatched that it needs to be
* canceled. */
preventDefault(): void;
/** Invoking this method prevents event from reaching any registered event
* listeners after the current one finishes running and, when dispatched in a
* tree, also prevents event from reaching any other objects. */
stopImmediatePropagation(): void;
/** When dispatched in a tree, invoking this method prevents event from
* reaching any objects other than the current object. */
stopPropagation(): void;
readonly AT_TARGET: number;
readonly BUBBLING_PHASE: number;
readonly CAPTURING_PHASE: number;
readonly NONE: number;
static readonly AT_TARGET: number;
static readonly BUBBLING_PHASE: number;
static readonly CAPTURING_PHASE: number;
static readonly NONE: number;
}
/**
* EventTarget is a DOM interface implemented by objects that can receive events
* and may have listeners for them.
*/
declare class EventTarget {
/** Appends an event listener for events whose type attribute value is type.
* The callback argument sets the callback that will be invoked when the event
* is dispatched.
*
* The options argument sets listener-specific options. For compatibility this
* can be a boolean, in which case the method behaves exactly as if the value
* was specified as options's capture.
*
* When set to true, options's capture prevents callback from being invoked
* when the event's eventPhase attribute value is BUBBLING_PHASE. When false
* (or not present), callback will not be invoked when event's eventPhase
* attribute value is CAPTURING_PHASE. Either way, callback will be invoked if
* event's eventPhase attribute value is AT_TARGET.
*
* When set to true, options's passive indicates that the callback will not
* cancel the event by invoking preventDefault(). This is used to enable
* performance optimizations described in § 2.8 Observing event listeners.
*
* When set to true, options's once indicates that the callback will only be
* invoked once after which the event listener will be removed.
*
* The event listener is appended to target's event listener list and is not
* appended if it has the same type, callback, and capture. */
addEventListener(
type: string,
listener: EventListenerOrEventListenerObject | null,
options?: boolean | AddEventListenerOptions
): void;
/** Dispatches a synthetic event event to target and returns true if either
* event's cancelable attribute value is false or its preventDefault() method
* was not invoked, and false otherwise. */
dispatchEvent(event: Event): boolean;
/** Removes the event listener in target's event listener list with the same
* type, callback, and options. */
removeEventListener(
type: string,
callback: EventListenerOrEventListenerObject | null,
options?: EventListenerOptions | boolean
): void;
[Symbol.toStringTag]: string;
}
interface EventListener {
(evt: Event): void | Promise;
}
interface EventListenerObject {
handleEvent(evt: Event): void | Promise;
}
declare type EventListenerOrEventListenerObject =
| EventListener
| EventListenerObject;
interface AddEventListenerOptions extends EventListenerOptions {
once?: boolean;
passive?: boolean;
}
interface EventListenerOptions {
capture?: boolean;
}
/** Events measuring progress of an underlying process, like an HTTP request
* (for an XMLHttpRequest, or the loading of the underlying resource of an
* ,