Clear setTimeout in JavaScript

One of the things I always have to look up is how to cancel a setTimeout in JavaScript.

This is a quick note for myself and anyone else who might need it.

Creating a timer

To create a timer in JavaScript, you can use the setTimeout function. This function takes two arguments: a function to execute and a time in milliseconds to wait before executing the function.

Here's an example:

const timer = setTimeout(() => {
	console.log("Hello, world!");
}, 1000);

In this code, the setTimeout function will execute the function after 1000 milliseconds (1 second).

If we console.log the timer variable, we will see that it is a number. This number is the ID of the timer.

Cancelling a timer

To cancel a timer, you can use the clearTimeout function. This function takes the ID of the timer as an argument.

Here's an example:

clearTimeout(timer);

In this code, the clearTimeout function will cancel the timer with the ID stored in the timer variable.

That's it! Now we know how to cancel a timeout in JavaScript.

• Tech,
• JavaScript

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