span inside button, is not clickable in Firefox

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!

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>