const para = document.getElementById("para")
If the delay is not present in the setTimeout() method then it is set to zero and the message will appear immediately. (3,000 milliseconds) const para = document.getElementById("para") In this example, the message will appear on the screen after a delay of 3 seconds. Inside this method, you can specify how many milliseconds you want the function to delay. SetTimeout() will set a timer and once the timer runs out, the function will run. let timeoutID = setTimeout(function, delay in milliseconds, argument1, argument2.) Here is the syntax for the setTimeout() method. SetTimeout() is a method that will execute a piece of code after the timer has finished running. In this article, I will explain what the setTimeout() method is with code examples and how it differs from setInterval(). So, looping waiting for some variable to change will never work because no other code can run to change that variable.Have you ever wondered if there is a method to delay your JavaScript code by a few seconds? 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). If you did try to "pause" by looping, then you'd essentially "hang" the Javascript interpreter for a period of time. Instead, any code that you want to run delays must be inside the setTimeout() callback function (or called from that function). You cannot just pause javascript execution for a predetermined amount of time. It will not wait until after the timeout fires in the stateChange() function. The console.log() statement will run immediately. function wait(ms)īut, if you have code like this: stateChange(-1) However, if in some non-production case you really want to hang the main thread for a period of time, this will do it. Joseph Silber has demonstrated that well in his answer. You really shouldn't be doing this, the correct use of timeout is the right tool for the OP's problem and any other occasion where you just want to run something after a period of time.
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