Over a million developers have joined DZone.

Intercepting onclick event in JavaScript using JQuery

DZone's Guide to

Intercepting onclick event in JavaScript using JQuery

· Web Dev Zone
Free Resource

Start coding today to experience the powerful engine that drives data application’s development, brought to you in partnership with Qlik.

Let’s say you are using some external components in your web page that renders a button as below:

<input type="button" value="Delete" onclick="delete();" />

The above code will call the delete() method when user clicks on the button.

But, what if you want to show a confirmation box before calling the delete()? Since the code is rendered by a external component, most probably you won’t be having control over how its code generated.

So, you have to intercept the onclick event and block it until your method is called and then invoke the original method.

Lets do it..

var btn = $("#btn");
btn.data("funcToCall", btn.attr("onclick"));
$("#btn").bind("click", function(e){
    if(confirm("Are you sure?")){
        var func = $(this).data("funcToCall");

As you can see, the onclick function is first stored into that element and then the onclick attribute is removed. Finally when the button in clicked, our custom method is called first and based on the user decision, the delete() method is either called or not called.

From http://veerasundar.com/blog/2011/10/intercepting-onclick-event-in-javascript-using-jquery/

Create data driven applications in Qlik’s free and easy to use coding environment, brought to you in partnership with Qlik.


Opinions expressed by DZone contributors are their own.


Dev Resources & Solutions Straight to Your Inbox

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.


{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}