debounce

Delay function calls until a set time elapses after the last invocation

Install

npm install debounce

Usage

import debounce from 'debounce';

function resize() {
	console.log('height', window.innerHeight);
	console.log('width', window.innerWidth);
}

window.onresize = debounce(resize, 200);

(You can also use const debounce = require('debounce'))

To check if the debounce delay is currently active:

window.onresize.isPending;

To later clear the timer and cancel currently scheduled executions:

window.onresize.clear();

To execute immediately only if you have scheduled invocations and reset the timer:

window.onresize.flush();

To execute immediately and reset the timer if it was previously set:

window.onresize.trigger();

API

debounce(fn, wait, options?)

Creates a debounced function that delays execution until wait milliseconds have passed since its last invocation.

Set the immediate option to true to execute the function immediately at the start of the wait interval, preventing issues such as double-clicks on a button.

The returned function has the following methods:

• .isPending indicates whether the debounce delay is currently active.
• .clear() cancels any scheduled executions.
• .flush() if an execution is scheduled then it will be immediately executed and the timer will be cleared.
• .trigger() executes the function immediately and clears the timer if it was previously set.

Related

• p-debounce - Similar but handles promises
• throttleit - Throttle a function to limit its execution rate