Java has Thread.sleep(2000), Python has time.sleep(2), Go has time.Sleep(2 * time.Second).
site design / logo © 2020 Stack Exchange Inc; user contributions licensed under Private self-hosted questions and answers for your enterpriseProgramming and related technical career opportunitiesThe main problem is that in some cases (specifically testing) this is woefully inadequate. I am wanting to create a JavaScript sleep/delay/wait function that I can call anywhere in the script, like jQuery's .delay() I am not able to use setTimeout, as I have a script that is generated by php, and so am not able to put it into two different functions, with the timeout in the middle. The Overflow Blog But we should thank promises and async/await function in ES 2018.
By using our site, you acknowledge that you have read and understand our JavaScript do not have a function like pause or wait in other programming languages. Use milliseconds in int for delay value.I used it to run PC games from edge or IE.
What if you need to sleep for 500ms before returning from the function, for instance to simulate a If by "testing" you mean unit tests: your test framework should have a way to run async tests.
Free 30 Day Trial I need to create a function that allows me to do Your answer solved a problem I have been facing for three days already. “In computing, sleep is a command in Unix, Unix-like and other operating systems that suspends program execution for a specified time.” — Going back to the original problem, you try to call Looking back at the docs, you realize that the problem is that the first argument is actually supposed to be a function call, not the delay. It suits that job fine, so I thought I post it for anyone else who arrives here with a similar use case. In JavaScript gibt es seit ES6 die Option, Promises für diesen Zweck zu verwenden.
There are some approaches that can be used to simulate a sleep function. You can schedule a function of code to run 5 seconds from now, but you have to put the code that you want to run later into a function and the rest of your code after that function will continue to run immediately.Instead, any code that you want to run delays must be inside the If you did try to "pause" by looping, then you'd essentially "hang" the Javascript interpreter for a period of time. However, if you're thinking other asynchronous tasks in the client will be completed while it's running, then you obviously haven't tested it. After all, Before we talk about how to fix the issue, let’s examine the In the anonymous function, you can specify any arbitrary code to be executed after the timeout period:Theoretically you can just pass the function as the first argument, and the arguments to that callback function as the remaining parameters, but that never seems to work right for me:People work around this using a string, but that is This JavaScript sleep() function works exactly as you might expect, because The following code is equivalent to the last example:Using increasing timeouts works because the code is all executed at the same time, so the specified callback functions will be executed 1, 2, and 3 seconds from the time of the execution of the synchronous code.Personally, I like this method a lot, though you can’t create a sleep function that works this way without tracking (or guessing) what the timeout should be using some type of variable.And here is a code snippet with the simpler use of increasing timeouts:Again, I prefer the latter syntax, particularly for use in loops.Taking a different approach, you can pass staggered (increasing) timeouts to Hopefully this helps you introduce some delay into your code — only using vanilla JavaScript, without any need for external libraries or frameworks. But if at some point node will decide to make it faster/safer/more efficient you’ll be using node js version upfront. @Gzork Thread sleep is only one way to implement a wait function, and it's unfortunately not available in the context of client-side javascript. This function below doesn’t work like I want it to; being a JS novice I can’t figure out why.I need it to wait 5 seconds before checking whether the Currently, it doesn’t wait, it just checks straight away.You have to put your code in the callback function you supply to I've arrived here because I was building a simple test case for sequencing a mix of asynchronous operations around long-running blocking operations (i.e.
However, JS has setTimeout() function, which can delay an action. @Gzork Thread sleep is only one way to implement a wait function, and it's unfortunately not available in the context of client-side javascript. Java Script & HTML setTimeout과 custom sleep LichKing 2017. your coworkers to find and share information. Because Javascript runs your code in only a single thread, when you're looping nothing else can run (no other event handlers can get called). Stack Overflow works best with JavaScript enabled 12. Even so, it's creating a Date() object in a while loop, which might very overwhelm the GC if it runs long enough. Although readabilty is more likely to be the key factor for most people, in which case you better use the first way.Thank you. But I can't emphasize enough, The advantage of this approach is that it makes your code look and behave like synchronous code.You should not just try to pause 5 seconds in javascript. JavaScript does not have a native sleep function, but thanks to the introduction of promises (and async/await in ES2018) we can implement such feature in a very nice and readable way, to make your functions sleep:
It doesn't work that way. JavaScript, unlike other languages, does not have any method to simulate a sleep() function. Featured on Meta
JS Pause Wait. Method 1: Using an infinite loop to keep checking for the elapsed time I had issues with using the wait() solution above.
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