Spoiler: JavaScript never really "pauses". Once the 3000ms have passed, you see that the code inside the function ( console.log ('freeCodeCamp')) executes successfully. In this post, I'll discuss how you can achieve that and what it really means to "pause" or "sleep" 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. 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. ('Will be printed after 2 seconds') The delay(). However, there are other ways that you can make a program wait for a specified time. So you cannot simply call a sleep() function to pause a Node.js program. However, using Sleep is not considered a good Selenium testing best practice, due to which QA engineers use other forms of wait in the source code. Unlike other programming languages, JavaScript doesn’t have a built-in sleep method. More and more ideas and features are being ported from different languages and being integrated in JavaScript. When performing Selenium, the Sleep function will cause the execution of your code to halt for a specified number of seconds. And it hasn't been the same since ES5 was released.
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