How do I get the value of onclick from a button using Javascript

Question

The question is similar to the one here, except I need to use Javascript. I have a button like so:

<button id="btn1" onclick="clickhandler()">Test</button>

I need this for verification purposes, i.e. to assign the click handler, and then use javascript to verify that the correct function was assigned.

Brian · Accepted Answer · 2011-07-26 20:33:33Z

3

UPDATED - totally misunderstood your question...

You want to know if you can verify which handlers are assigned to which tags programmatically... gotcha...

So if you try:

document.getElementById("myButton").onclick.toString();

You'll see that what you get is:

function onclick()
{
    YOUR METHOD NAME HERE
}

I'm sure you can take it from there... everything between "function onclick\n{" and "\n}" is your method.

Sorry I misunderstood your question originally!

B

edited Jul 26, 2011 at 20:33

answered Jul 26, 2011 at 17:49

Brian

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Wulf · Accepted Answer · 2014-12-11 14:38:58Z

1

Just do the same, but in pure javascript:

var onclick = document.getElementById("btn1").onclick;

edited Dec 11, 2014 at 14:38

answered Jul 26, 2011 at 17:50

Wulf

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1 Comment

Alic Over a year ago

It should be: var onclick = document.getElementById("btn1").onclick; You capitalized the 'd'

Jaime · Accepted Answer · 2011-07-26 17:52:02Z

0

you could use getAttribute:

var anc = document.getElementById("anc");
alert(anc.getAttribute('onclick'));

answered Jul 26, 2011 at 17:52

Jaime

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2 Comments

Freakishly Over a year ago

Tried document.getElementById('anc').getAttribute('onclick')); and it didn't work. I didn't see getAtrribute support the onclick property, so I posted this question :(

Jaime Over a year ago

I don't think the getAttribute cares about the name of the attribute you're trying to get.... try this jsbin.com/etawel/edit

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