This means that anything defined after it on the code will run before the delay. Notice how our setTimeout function runs asynchronously and that it won't stop the flow of our program. log ( 'Executed before the delay, but after the 1st console.log' ) Now, this looks great and simple! However, here's the trick: console. In this case, we are using 1000ms, which is the equivalent of 1 second. One is the callback function that will get executed after a specific time, and the other is the number of milliseconds we want to delay the execution. The setTimeout function takes two parameters. One of the easiest way to achieve a 1 second delay is by using the setTimeout function that lives on the window global object. Some are better than others and some should only be used in specific circumstances. There are quite a few ways to tell JavaScript to wait for 1 second. Many workarounds are there to try to implement such functions.To force a 1 second pause or delay in JavaScript we can use the setTimeout function, but if we want a better solution we should use the Promise function.

I understand that using setTimeout() involves more thought than a desirable sleep() function, but unfortunately the later doesn't exist. Var y = null // To keep under proper scope You use setTimeout() to rewrite it this way: var x = 1

Place mysterious code that blocks the thread for 100 ms. It's not that hard to use actually, instead of writing this: var x = 1 Unfortunately, setTimeout() is the only reliable way (not the only way, but the only reliable way) to pause the execution of the script without blocking the UI.

Javascript wait 5 seconds