Twitter bootstrap collapse: change display of toggle button

try this. http://jsfiddle.net/fVpkm/

Html:-

<div class="row-fluid summary">
    <div class="span11">
        <h2>MyHeading</h2>  
    </div>
    <div class="span1">
        <button class="btn btn-success" data-toggle="collapse" data-target="#intro">+</button>
    </div>
</div>
<div class="row-fluid summary">
    <div id="intro" class="collapse"> 
        Here comes the text...
    </div>
</div>

JS:-

$('button').click(function(){ //you can give id or class name here for $('button')
    $(this).text(function(i,old){
        return old=='+' ?  '-' : '+';
    });
});

Update With pure Css, pseudo elements

http://jsfiddle.net/r4Bdz/

Supported Browsers

button.btn.collapsed:before
{
    content:'+' ;
    display:block;
    width:15px;
}
button.btn:before
{
    content:'-' ;
    display:block;
    width:15px;
}

Update 2 With pure Javascript

http://jsfiddle.net/WteTy/

function handleClick()
{
    this.value = (this.value == '+' ? '-' : '+');
}
document.getElementById('collapsible').onclick=handleClick;

Add some jquery code, you need jquery to do this :

<script>
        $(".btn[data-toggle='collapse']").click(function() {
            if ($(this).text() == '+') {
                $(this).text('-');
            } else {
                $(this).text('+');
            }
        });
        </script>

Here's another CSS only solution that works with any HTML layout.

It works with any element you need to switch. Whatever your toggle layout is you just put it inside a couple of elements with the if-collapsed and if-not-collapsed classes inside the toggle element.

The only catch is that you have to make sure you put the desired initial state of the toggle. If it's initially closed, then put a collapsed class on the toggle.

It also requires the :not selector, so it doesn't work on IE8.

HTML example:

<a class="btn btn-primary collapsed" data-toggle="collapse" href="#collapseExample">
  <!--You can put any valid html inside these!-->
  <span class="if-collapsed">Open</span>
  <span class="if-not-collapsed">Close</span>
</a>
<div class="collapse" id="collapseExample">
  <div class="well">
    ...
  </div>
</div>

Less version:

[data-toggle="collapse"] {
    &.collapsed .if-not-collapsed {
         display: none;
    }
    &:not(.collapsed) .if-collapsed {
         display: none;
    }
}

CSS version:

[data-toggle="collapse"].collapsed .if-not-collapsed {
  display: none;
}
[data-toggle="collapse"]:not(.collapsed) .if-collapsed {
  display: none;
}

JS Fiddle

All the other solutions posted here cause the toggle to get out of sync if it is double clicked. The following solution uses the events provided by the Bootstrap framework, and the toggle always matches the state of the collapsible element:

HTML:

<div class="row-fluid summary">
    <div class="span11">
        <h2>MyHeading</h2>  
    </div>
    <div class="span1">
        <button id="intro-switch" class="btn btn-success" data-toggle="collapse" data-target="#intro">+</button>
    </div>
</div>
<div class="row-fluid summary">
    <div id="intro" class="collapse"> 
        Here comes the text...
    </div>
</div>

JS:

$('#intro').on('show', function() {
  $('#intro-switch').html('-')
})
$('#intro').on('hide', function() {
  $('#intro-switch').html('+')
})

That should work for most cases.

However, I also ran into an additional problem when trying to nest one collapsible element and its toggle switch inside another collapsible element. With the above code, when I click the nested toggle to hide the nested collapsible element, the toggle for the parent element also changes. It may be a bug in Bootstrap. I found a solution that seems to work: I added a "collapsed" class to the toggle switches (Bootstrap adds this when the collapsible element is hidden but they don't start out with it), then added that to the jQuery selector for the hide function:

http://jsfiddle.net/fVpkm/87/

HTML:

<div class="row-fluid summary">
    <div class="span11">
        <h2>MyHeading</h2>  
    </div>
    <div class="span1">
        <button id="intro-switch" class="btn btn-success collapsed" data-toggle="collapse" data-target="#intro">+</button>
    </div>
</div>
<div class="row-fluid summary">
    <div id="intro" class="collapse"> 
        Here comes the text...<br>
        <a id="details-switch" class="collapsed" data-toggle="collapse" href="#details">Show details</a>
        <div id="details" class="collapse">
            More details...
        </div>
    </div>
</div>

JS:

$('#intro').on('show', function() {
    $('#intro-switch').html('-')
})
$('#intro').on('hide', function() {
    $('#intro-switch.collapsed').html('+')
})

$('#details').on('show', function() {
    $('#details-switch').html('Hide details')
})
$('#details').on('hide', function() {
    $('#details-switch.collapsed').html('Show details')
})