jQuery检查元素上是否存在onClick

Question

I found the way to check if event exists on element . But it's not work on the events which is not delegated by jQuery...

When I try,

$("a").data("events");

for this.

<a href="#" onClick="alert('Hello, World!')" />

It returned undefined.

Is there any way to check if onClick exists on elements with jQuery?

Thanks.

Answer 1

你可以做：

if ($('a').attr("onClick") != undefined) {}

Answer 2

Just do:

if( myelement.onclick != null )
{
   //onclick exists
}
else
{
   //onclick doesn't exist
}

No need for jQuery.

Answer 3

if( $('#elementName').click == undefined)  
   { //event handler doesn't exist }
else 
   { //handler exists }

Answer 4

For sure there are some valid answers here, this was a good one that got me going.

if ($('a').attr("onClick") != undefined) {}

But I found the best answer for you, as it was for since we are both dealing with hyperlinks, would looking for the href attribute.

if ($('a').attr("href") != undefined) {}

I particularly liked this approach.

Answer 5

I think the following things should also work

if ($(yourElement).attr("onClick").length != 0) {}

if ($(yourElement).attr("onClick").size() != 0) {}

Thanks