![]() ![]() When a timer's function is called varies depending on which method was used to create the timer and what other work the Node.js event loop is doing. Therefore, the above sleep() method will only suspend the execution of the function where you'll call it. A timer in Node.js is an internal construct that calls a given function after a certain period of time. Remember that due to the asynchronous nature of JavaScript, it is not possible to stop the entire program execution. It is guaranteed that a timeoutID value will never be reused by a subsequent call to setTimeout() or setInterval() on the same object (a window or a worker). But after the introduction of promises in ES6, we can easily implement such a feature in JavaScript to make a function sleep: const sleep = ( ms ) => timer ( ) // Start time -> T08:42:34.754Z // After 2s -> T08:42:36.763Z // After 4s -> T08:42:38.764Z The returned timeoutID is a positive integer value which identifies the timer created by the call to setTimeout().This value can be passed to clearTimeout() to cancel the timeout. However, this functionality is not available in JavaScript due to its asynchronous execution model. There is one thing you can do for multiple. The setTimeout () can be used to execute the code after a given amount of milliseconds. It has a callback function attached to it which gets executed after a given amount of time. So to pause for a specific time we use the setTimeout () function. Similarly, PHP has sleep(2), and Python has time.sleep(2) to make the program stops for 2 seconds. That time we will require a pause in our server. Ryan Shillington at 22:06 9 let sleep require ('util').promisify (setTimeout) is three characters longer but reusable and more readable imo Brian H. ![]() For example, in Java, you can use the Thread.sleep(2 * 1000) to halt the current thread execution for 2 seconds. You have to be using NodeJS 7.6.0 or above though. Many programming languages provide a sleep() function that pauses the execution of the code for a certain amount of time. ![]()
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