![]() ![]() We’ll look at the pros and cons of each method as well as how to use sleep in Node.js most effectively. This article will look at setTimeout and setInterval, two ways to make your Node.js code pause. The sleep function can be useful when you want to wait for an asynchronous task to finish or when you need to add a delay so that you don’t send too many requests to a remote API. However, in some cases, you should pause the execution of Node.js code. ![]() Node.js is a great choice for real-time web apps with many connections because it can handle multiple connections simultaneously with a single-threaded event loop. Here's a simple example of a 5-second sub-process queuing up parameters for a 4-second main process in a non-blocking has a JavaScript runtime environment, and developers can make scalable, high-performance server-side apps. In order to "wait" in javascript using promises are the way to go as the top answers show. Using the fat arrow operator, though, makes it even smaller (and more elegant). Simple and elegant sleep function using modern Javascript function sleep(millis), millis) You can use it today by using webpack 5 (alpha), In the top level like in this example await sleep(1000) Soon you will be able to use the await syntax outside of an async function. No need to provide command line arguments. ![]() Update June 2019: By using the latest versions of NodeJS you can use it out of the box. ![]() You can use the new async/await syntax.įor using async/await out of the box without installing and plugins, you have to use node-v7 or node-v8, using the -harmony flag. Today ( Jan 2017 June 2019) it is much easier. > await delay(1000) /// waiting 1 second.Ī new answer to an old question. > const delay = ms => new Promise(resolve => setTimeout(resolve, ms)) Update Jan 2021: You can even do it in the Node REPL interactive using -experimental-repl-await flag $ node -experimental-repl-await ![]()
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