span inside button, is not clickable in Firefox

My CODE

HTML:

<p id="console"></p>
<button>Click <span class="icon"></span>
</button>

JS:

$('.icon').click(function () {
    $('#console').html('Icon has been clicked');
    return false;
});

$('button').click(function () {
    $('#console').html('Button has been clicked');
});

CSS:

.icon {
    background-position: -96px 0;
    display: inline-block;
    width: 14px;
    height: 14px;
    margin-top: 1px;
    line-height: 14px;
    vertical-align: text-top;
    background-image: url("http://twitter.github.com/bootstrap/assets/img/glyphicons-halflings.png"); 
    background-repeat: no-repeat;
}

Demo

Problem

I am able to click on .icon in Chrome , but not in Firefox. When I click on .icon, it clicks on whole button.

Question:

Isnt my code valid ? If my code is valid, whats the solution to this problem.

What I have tried

1. I have tried doing $('.icon').click() from console and it works perfectly in ff, so I guess the problem is that span is not clickable inside button.

2. e.preventDefault() and e.stopPropagation are not working either.

3. I've tried putting   inside span but its not working either.

Refer to the spec, most notably the forbidden contents (in the SGML definition; for assistance reading that, look here): as, forms, form "controls" (input, select, etc), and fieldsets.

While you are correct in asserting that spans (and divs, etc) are legal contents of a button element, the illegal elements are all to do with having button content that does anything other than layout / styling.

I don't see anything in the spec precluding what you're trying to do, but I do see a lot discouraging it, and would be unsurprised if various browsers also "discouraged" that by not supporting it.

Which is to say: find another way to do what you want if you want to have cross-browser support. I don't understand what you're actually trying to do, so I don't think its possible to propose alternatives. I get that you want to respond differently to clicking on the button vs the icon -- but that's a (good, btw) demonstration of what you don't want to happen, not an explanation of an actual problem you want to solve.

One way might be to not use a button, and instead use another span or a div:

<p id="console"></p>
<div class="button_replace">Click <span class="icon"></span></div>
<script>
  $('.icon').click(function () {
    $('#console').html('Icon has been clicked');
    return false;
  });
  $('.button_replace').click(function () {
    $('#console').html('Button has been clicked');
  });
</script>

If you're here, maybe this solution will work for you, even though it's not really related directly to the question.

If you've applied a

• $("button").click() listener, and
• your button contains a <span> or any other <tag>, and
• your .click callback function refers to $(this) (or even this)

Then, if you click on the button, this will likely be the top-most tag you CLICKED ON.

This will often, such as in my case, misattribute the caller, causing script errors.

Hope it helps someone out there!