JavaScript: Remove an event listener from an element

JavaScript fundamental (ES6 Syntax): Exercise-93 with Solution

Write a JavaScript program to remove an event listener from an element.

  • Use EventTarget.removeEventListener() to remove an event listener from an element.
  • Omit the fourth argument opts to use false or specify it based on the options used when the event listener was added.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const off = (el, evt, fn, opts = false) => el.removeEventListener(evt, fn, opts);
const fn = () => console.log('!');
document.body.addEventListener('click', fn);
console.log(off(document.body, 'click', fn)); 

Sample Output:



flowchart: Remove an event listener from an element

Live Demo:

See the Pen javascript-basic-exercise-93-1 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript program to create a function that gets the argument at index n. If n is negative, the nth argument from the end is returned.
Next: Write a JavaScript program to move the specified amount of elements to the end of the array.

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JavaScript: Tips of the Day

How to remove a specific item from an array?

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];


const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);

// array = [2, 9]

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  return arr;

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
  return arr;
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

Ref: https://bit.ly/2N9nKRp