- Tags: JS DOM, JS DOM Element
- Categories: JavaScript Methods, JavaScript Reference, Reference
Quick Reference
The Element removeEventListener() method removes an event handler to an element.
<!-- button to remove event handler -->
<button onclick="remove_handler()">Remove Event</button>
<!-- element with event -->
<p id="output">Hover for Alert</p>
When the user clicks the button, the event will be removed from the paragraph element.
// variable
let my_element = document.getElementById('output');
// original event
my_element.addEventListener('mouseover', my_function);
// function called by event
function my_function() {
alert('You have clicked the mouse.');
}
// remove the event
function remove_handler() {
my_element.removeEventListener("mouseover", my_function);
}
Output
(no output, but the event has been removed)
Syntax
element.removeEventListener(event, function, useCapture)
Parameters
| Parameter | Return Types |
|---|---|
| event | The event name; do not use the "on" prefix (click NOT onclick) (required) Any of these events are applicable |
| function | The function to run when the event occurs (required) |
| useCapture | true - remove the handler from the bubbling phase false - remove the handler from the bubbling phase (default is false) |
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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