How to cancel timeout inside of Javascript Promise?

Edit 2021 all platforms have converged on AbortController as the cancellation primitive and there is some built in support for this. In Node.js // import { setTimeout } from ‘timers/promises’ // in ESM const { setTimeout } = require(‘timers/promises’); const ac = new AbortController(); // cancellable timeout (async () => { await setTimeout(1000, null, { … Read more

difference between setTimeout in javascript and $timeout service in angularjs

There are some cases where one needs to perform some sort of timeout operation and we frequently achieve this using JavaScript’s setTimeout() function. However, if we use setTimeout() in an AngularJS application we also need to use $scope.$apply() to ensure that any changes to the scope will be reflected elsewhere (i.e. data-bound in a view). … Read more

Is it possible to chain setTimeout functions in JavaScript?

Three separate approaches listed here: Manually nest setTimeout() callbacks. Use a chainable timer object. Wrap setTimeout() in a promise and chain promises. Manually Nest setTimeout callbacks Of course. When the first one fires, just set the next one. setTimeout(function() { // do something setTimeout(function() { // do second thing }, 1000); }, 1000); Chainable Timer … Read more

How is setTimeout implemented in node.js

You’ve done most of the work already. V8 doesn’t provides an implementation for setTimeout because it’s not part of ECMAScript. The function you use is implemented in timers.js, which creates an instance of a Timeout object which is a wrapper around a C class. There is a comment in the source describing how they are … Read more

What happens to JavaScript execution (settimeout, etc.) when iPhone/Android goes to sleep?

Looks like Javascript execution is paused on MobileSafari when the browser page isn’t focused. It also seems if setInterval() events are late, they are simply fired as soon as the browser is focused. This means we should be able to keep a setInterval() running, and assume the browser lost/regained focus if the setInterval function took … Read more

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