Setting the width of a dropdown list in Bootstrap 3.0

Question

How can I set the width of a dropdown triggering button in bootstrap 3.0 to be equal to the width of the dropdown list? Similar to what is achieved when using bootstrap-sele

Answer 1

If I understand correctly you want to style the menu width according to the larger option you have to override the min-width property of the .dropdown-menu list like:

.dropdown-menu {
    min-width: 0px !important;
}

Demo: http://jsfiddle.net/faxyz/4/

Answer 2

You can set the width of .dropdown-toggle. I recommend to use text-overflow ellipsis when the dropdown becomes too small. It's not necessary to style .dropdown-menu. You can set the width of the dropdown to any other value if you want to use it in .input-group or not in the grid.

.dropdown-toggle {   
    overflow: hidden;
    padding-right: 24px /* Optional for caret */;
    text-align: left;
    text-overflow: ellipsis;    
    width: 100%;
}

/* Optional for caret */
.dropdown-toggle .caret {
    position: absolute;
    right: 12px;
    top: calc(50% - 2px);
}

Answer 3

I found the solution by setting the dropdown-menu and button width=100%.

.dropdown-menu {
  width: 100%; 
}

.btn{
 width: 100%;
}

Now both the button and dropdown list have the same width, controlled by the column width.

Answer 4

I came here looking for a solution to a similar problem, although in my case the dropdown wasn't within a col div. I wanted the dropdown button to match the width of the dropdown list, dependant on the content width of whichever was wider, similar to a select dropdown. If anyone is looking for a similar solution here it is:

.dropdown-container {
  float:right;
  height:60px;
}
.position-dropdown-controller {
  position: absolute;
  right:0;
}

.dropdown-toggle,
.dropdown-menu {
  width: 100%;
  min-width: 0;
}

.dropdown-toggle {
  text-align: right;
}

.dropdown-menu {
  height: 0;
  text-align: center;
  display: block !important;
  visibility: hidden;
  position: relative;
  float: none;
}

.open .dropdown-menu {
  display: block !important;
  visibility: visible;
  height: auto;
}

<div class="dropdown-container">
  <div class="position-dropdown-controller">
    <div class="dropdown">
      <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">Dropdown<span class="caret"></span></button>
      <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
        ...
      </ul>
    </div>
  </div>
</div>

In this example I wanted the dropdown floated to the right, but it can just as easily be tweaked to work however you like.