How to override JavaScript/jQuery functions and events?

Today with the help of this article I am going to explain you to override predefined functions and predefined events on a selector without changing in the core file.

Override Event

Below code snippet show that with the help of .off() function we can override events in jquery

$(document).off('event', 'selector').on('event', 'selector', function() {
	// Your code


override function

Suppose you have a predefined js function helloWorld

function helloWorld (argument) {

Now, if you want to override this function then

var origHelloWorld = window.helloWorld;
window.helloWorld = function(argument) {
    	//your code
    	origHelloWorld(argument); 	// after your code if you want to call original function 

That’s all in this article, hope it will help you to override functions and events in js. Try this and if you have any query then just comment below. 🙂

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