Spoiler: JavaScript never really 'pauses'. In this post, I'll discuss how you can achieve that and what it really means to 'pause' or 'sleep' in JavaScript. 2 for the records and future searchs: this can be very helpful for who is actually using Selenium with Javascript and React, because you can wait some seconds while React recalculates the page after e.g. One of those features are Promises, which are probably the most widely used feature in JavaScript after ES5 was released.īut one of the things which JavaScript misses is a way to 'pause' execution for a while and resume it later. Here, mySleepFunction is a method that takes the delayTime in milliseconds and returns the promise which is resolved after 5000 milliseconds with the help of a setTimeout timer event in javascript.

Once the 3000ms have passed, you see that the code inside the function ( console.log ('freeCodeCamp')) executes successfully. The above code explains how sleep like usage can be implemented in javascript. More and more ideas and features are being ported from different languages and being integrated in JavaScript. The second line of code indicates that there needs to be a scheduled delay of 3000ms (or 3 seconds) before the code in the codingCourse () function is executed.

And it hasn't been the same since ES5 was released.

Javascript sleep 2 seconds