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. Spoiler: JavaScript never really 'pauses'. 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. When performing Selenium, the Sleep function will cause the execution of your code to halt for a specified number of seconds. In this post, I'll discuss how you can achieve that and what it really means to 'pause' or 'sleep' in JavaScript. Java has Thread.sleep (2000), Python has time.sleep (2), Go has time.Sleep (2 time.Second). We can use some approaches for simulating the sleep() function in.

In a programming language like C or PHP, you’d call sleep (2) to make the program halt for 2 seconds. Unlike other languages, JavaScript doesnt have any sleep() function. 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. Sometimes you want your function to pause execution for a fixed amount of seconds or milliseconds. More and more ideas and features are being ported from different languages and being integrated in JavaScript. And it hasn't been the same since ES5 was released.

Javascript sleep 2 seconds