@types/node
Version:
TypeScript definitions for node
152 lines (151 loc) • 6.76 kB
TypeScript
/**
* The `node:console` module provides a simple debugging console that is similar to
* the JavaScript console mechanism provided by web browsers.
*
* The module exports two specific components:
*
* * A `Console` class with methods such as `console.log()`, `console.error()`, and `console.warn()` that can be used to write to any Node.js stream.
* * A global `console` instance configured to write to [`process.stdout`](https://nodejs.org/docs/latest-v25.x/api/process.html#processstdout) and
* [`process.stderr`](https://nodejs.org/docs/latest-v25.x/api/process.html#processstderr). The global `console` can be used without importing the `node:console` module.
*
* _**Warning**_: The global console object's methods are neither consistently
* synchronous like the browser APIs they resemble, nor are they consistently
* asynchronous like all other Node.js streams. See the [`note on process I/O`](https://nodejs.org/docs/latest-v25.x/api/process.html#a-note-on-process-io) for
* more information.
*
* Example using the global `console`:
*
* ```js
* console.log('hello world');
* // Prints: hello world, to stdout
* console.log('hello %s', 'world');
* // Prints: hello world, to stdout
* console.error(new Error('Whoops, something bad happened'));
* // Prints error message and stack trace to stderr:
* // Error: Whoops, something bad happened
* // at [eval]:5:15
* // at Script.runInThisContext (node:vm:132:18)
* // at Object.runInThisContext (node:vm:309:38)
* // at node:internal/process/execution:77:19
* // at [eval]-wrapper:6:22
* // at evalScript (node:internal/process/execution:76:60)
* // at node:internal/main/eval_string:23:3
*
* const name = 'Will Robinson';
* console.warn(`Danger ${name}! Danger!`);
* // Prints: Danger Will Robinson! Danger!, to stderr
* ```
*
* Example using the `Console` class:
*
* ```js
* const out = getStreamSomehow();
* const err = getStreamSomehow();
* const myConsole = new console.Console(out, err);
*
* myConsole.log('hello world');
* // Prints: hello world, to out
* myConsole.log('hello %s', 'world');
* // Prints: hello world, to out
* myConsole.error(new Error('Whoops, something bad happened'));
* // Prints: [Error: Whoops, something bad happened], to err
*
* const name = 'Will Robinson';
* myConsole.warn(`Danger ${name}! Danger!`);
* // Prints: Danger Will Robinson! Danger!, to err
* ```
* @see [source](https://github.com/nodejs/node/blob/v25.x/lib/console.js)
*/
declare module "node:console" {
import { InspectOptions } from "node:util";
namespace console {
interface ConsoleOptions {
stdout: NodeJS.WritableStream;
stderr?: NodeJS.WritableStream | undefined;
/**
* Ignore errors when writing to the underlying streams.
* @default true
*/
ignoreErrors?: boolean | undefined;
/**
* Set color support for this `Console` instance. Setting to true enables coloring while inspecting
* values. Setting to `false` disables coloring while inspecting values. Setting to `'auto'` makes color
* support depend on the value of the `isTTY` property and the value returned by `getColorDepth()` on the
* respective stream. This option can not be used, if `inspectOptions.colors` is set as well.
* @default 'auto'
*/
colorMode?: boolean | "auto" | undefined;
/**
* Specifies options that are passed along to
* [`util.inspect()`](https://nodejs.org/docs/latest-v25.x/api/util.html#utilinspectobject-options).
*/
inspectOptions?: InspectOptions | ReadonlyMap<NodeJS.WritableStream, InspectOptions> | undefined;
/**
* Set group indentation.
* @default 2
*/
groupIndentation?: number | undefined;
}
interface Console {
readonly Console: {
prototype: Console;
new(stdout: NodeJS.WritableStream, stderr?: NodeJS.WritableStream, ignoreErrors?: boolean): Console;
new(options: ConsoleOptions): Console;
};
assert(condition?: unknown, ...data: any[]): void;
clear(): void;
count(label?: string): void;
countReset(label?: string): void;
debug(...data: any[]): void;
dir(item?: any, options?: InspectOptions): void;
dirxml(...data: any[]): void;
error(...data: any[]): void;
group(...data: any[]): void;
groupCollapsed(...data: any[]): void;
groupEnd(): void;
info(...data: any[]): void;
log(...data: any[]): void;
table(tabularData?: any, properties?: string[]): void;
time(label?: string): void;
timeEnd(label?: string): void;
timeLog(label?: string, ...data: any[]): void;
trace(...data: any[]): void;
warn(...data: any[]): void;
/**
* This method does not display anything unless used in the inspector. The `console.profile()`
* method starts a JavaScript CPU profile with an optional label until {@link profileEnd}
* is called. The profile is then added to the Profile panel of the inspector.
*
* ```js
* console.profile('MyLabel');
* // Some code
* console.profileEnd('MyLabel');
* // Adds the profile 'MyLabel' to the Profiles panel of the inspector.
* ```
* @since v8.0.0
*/
profile(label?: string): void;
/**
* This method does not display anything unless used in the inspector. Stops the current
* JavaScript CPU profiling session if one has been started and prints the report to the
* Profiles panel of the inspector. See {@link profile} for an example.
*
* If this method is called without a label, the most recently started profile is stopped.
* @since v8.0.0
*/
profileEnd(label?: string): void;
/**
* This method does not display anything unless used in the inspector. The `console.timeStamp()`
* method adds an event with the label `'label'` to the Timeline panel of the inspector.
* @since v8.0.0
*/
timeStamp(label?: string): void;
}
}
var console: console.Console;
export = console;
}
declare module "console" {
import console = require("node:console");
export = console;
}