span 内部按钮，在 Firefox 中不可点击

Question

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.

Answer 1

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

While you are correct in asserting that span s (and div s, 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>

Answer 2

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!

Answer 3

Using previous answers, I found that just changing my to fixed the problem and allowed me to have content inside the button. The styling is virtually the same, I just left the same bootstrap button classes and element in there and it behaves just the same as before. The tabindex is there because I'm using a dropdown list inside the button so that the button (now div) can be focused and have (blur) or (focusout) event in Angular.