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Viewing / Editing File: timers.d.ts

/**
 * The `timer` module exposes a global API for scheduling functions to
 * be called at some future period of time. Because the timer functions are
 * globals, there is no need to call `require('timers')` to use the API.
 *
 * The timer functions within Node.js implement a similar API as the timers API
 * provided by Web Browsers but use a different internal implementation that is
 * built around the Node.js [Event Loop](https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/#setimmediate-vs-settimeout).
 * @see [source](https://github.com/nodejs/node/blob/v17.0.0/lib/timers.js)
 */
declare module 'timers' {
    import { Abortable } from 'node:events';
    import { setTimeout as setTimeoutPromise, setImmediate as setImmediatePromise, setInterval as setIntervalPromise } from 'node:timers/promises';
    interface TimerOptions extends Abortable {
        /**
         * Set to `false` to indicate that the scheduled `Timeout`
         * should not require the Node.js event loop to remain active.
         * @default true
         */
        ref?: boolean | undefined;
    }
    let setTimeout: typeof global.setTimeout;
    let clearTimeout: typeof global.clearTimeout;
    let setInterval: typeof global.setInterval;
    let clearInterval: typeof global.clearInterval;
    let setImmediate: typeof global.setImmediate;
    let clearImmediate: typeof global.clearImmediate;
    global {
        namespace NodeJS {
            // compatibility with older typings
            interface Timer extends RefCounted {
                hasRef(): boolean;
                refresh(): this;
                [Symbol.toPrimitive](): number;
            }
            interface Immediate extends RefCounted {
                /**
                 * If true, the `Immediate` object will keep the Node.js event loop active.
                 * @since v11.0.0
                 */
                hasRef(): boolean;
                _onImmediate: Function; // to distinguish it from the Timeout class
            }
            interface Timeout extends Timer {
                /**
                 * If true, the `Timeout` object will keep the Node.js event loop active.
                 * @since v11.0.0
                 */
                hasRef(): boolean;
                /**
                 * Sets the timer's start time to the current time, and reschedules the timer to
                 * call its callback at the previously specified duration adjusted to the current
                 * time. This is useful for refreshing a timer without allocating a new
                 * JavaScript object.
                 *
                 * Using this on a timer that has already called its callback will reactivate the
                 * timer.
                 * @since v10.2.0
                 * @return a reference to `timeout`
                 */
                refresh(): this;
                [Symbol.toPrimitive](): number;
            }
        }
        function setTimeout<TArgs extends any[]>(callback: (...args: TArgs) => void, ms?: number, ...args: TArgs): NodeJS.Timeout;
        // util.promisify no rest args compability
        // tslint:disable-next-line void-return
        function setTimeout(callback: (args: void) => void, ms?: number): NodeJS.Timeout;
        namespace setTimeout {
            const __promisify__: typeof setTimeoutPromise;
        }
        function clearTimeout(timeoutId: NodeJS.Timeout): void;
        function setInterval<TArgs extends any[]>(callback: (...args: TArgs) => void, ms?: number, ...args: TArgs): NodeJS.Timer;
        // util.promisify no rest args compability
        // tslint:disable-next-line void-return
        function setInterval(callback: (args: void) => void, ms?: number): NodeJS.Timer;
        namespace setInterval {
            const __promisify__: typeof setIntervalPromise;
        }
        function clearInterval(intervalId: NodeJS.Timeout): void;
        function setImmediate<TArgs extends any[]>(callback: (...args: TArgs) => void, ...args: TArgs): NodeJS.Immediate;
        // util.promisify no rest args compability
        // tslint:disable-next-line void-return
        function setImmediate(callback: (args: void) => void): NodeJS.Immediate;
        namespace setImmediate {
            const __promisify__: typeof setImmediatePromise;
        }
        function clearImmediate(immediateId: NodeJS.Immediate): void;
        function queueMicrotask(callback: () => void): void;
    }
}
declare module 'node:timers' {
    export * from 'timers';
}

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