In this code, Print first is displayed first and then the function execution is paused for 2 seconds before the next line of code is executed. In programming languages like C, Ruby, or Python pausing or delaying function execution is pretty straightforward as you would only need to call the sleep function.įor instance, consider the following Python function: import time However, there are different methods you can use to implement its functionality. The JavaScript version of sleep () is await. With promises, we can solve timing issues easily. What is the JavaScript version of sleep () Javascript Web Development Front End Technology. The Node.Js sleep function does not exist. In JavaScript, theres no sleep function like in other languages. setTimeout () method sleeping for 3 seconds If you omit the second parameter, then setTimeout () will immediately execute the passed function without waiting at all. Luckily for us, JavaScript provides a few ways for a developer to wait X seconds before executing the next line of the code. Sadly, a function like that is absent from JavaScripts default functionality. If you use Thread.sleep while performing automation testing with Selenium, then this method will stop the execution of the script for the specified duration of time, irrespective of whether the element is found. Javascript - JavaScript sleep/wait - Javascript Tutorial - The programming languages such as PHP and C has a sleep(sec) function to pause the execution for a fixed amount of time. This method can be called using the reference of the class name i.e Thread. How can we sleep or delay using Node.Js Javascript? There is a lot of use cases where you would want to pause your JavaScripts execution before running the next line. Sleep is a static method that belongs to the thread class. This setTimeout () method mimics the sleep method that’s native in other languages by: Setting a timer in the background when the JavaScript engine executes the setTimeout () function Continuing to run other code as the timer does its countdown Executing the callback function in setTimeout () when the timer reaches zero.
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