JavaScriptr removeEventListener

JavaScriptr removeEventListener

In this tutorial, you will learn about JavaScript removeEventListener() method:

The EventTarget.removeEventListener() method removes from the EventTarget an event listener previously registered with EventTarget.removeEventListener().
The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching event listeners for removal.

The Syntax of JavaScriptr removeEventListener

element.removeEventListener(event, listener, useCapture)

Example

Output

After clicking the button

Javascript Timer

Timer events

method	description
setTimeout(function, delayMS);	arranges to call given function after given delay in ms
setInterval(function, delayMS);	arranges to call function repeatedly every delayMS ms
setTimeout(timerID); setInterval(timerID);	stops the given timer so it will not call its function

Note : this ID can be passed to clearTimeout/Interval later to stop the timer

Example

Passing parameters to timers

function delayedMultiply() {

// 6 and 7 are passed to multiply when timer goes off

setTimeout(multiply, 2000, 6, 7);

}

function multiply(a, b) {

alert(a * b);

}

setTimeout(multiply(6 * 7), 2000);

Common timer errors

setTimeout(booyah(), 2000);

setTimeout(booyah, 2000);

setTimeout(multiply(num1 * num2), 2000);

setTimeout(multiply, 2000, num1, num2);