The positioning of the Bootstrap dropdown menu is not aligned correctly

Issue with positioning Bootstrap dropdown

I recently encountered a problem where I placed a bootstrap dropdown inside a div that centers the dropdown using CSS "text-align: center", but the dropdown menu still appeared in its original position. It seems like the dropdown doesn't recognize that its triggering button has been moved.

To see the problem for yourself, check out this jsfiddle:

https://jsfiddle.net/dkent600/wyos4ukt

The provided code snippet is as follows:

<div style="background-color:grey; text-align:center">
    <div class="dropdown">
        <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-expanded="true">
            Dropdown
            <span class="caret"></span>
        </button>
        <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Action</a></li>
         </ul>
    </div>
</div>

If you have any tips or suggestions on how to resolve this issue, please let me know. Thank you!

htmlcsstwitter-bootstraptwitter-bootstrap-3

Answer №1

If you apply the btn-group class to the .dropdown element, it will properly position the dropdown-menu.

Check out the Updated Example here!

<div class="btn-group dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-expanded="true>
        Dropdown
        <span class="caret"></span>
    </button>
    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Action</a></li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Another action</a></li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Something else here</a></li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Separated link</a></li>
    </ul>
</div>

This solution works by adding specific CSS rules when using the class that positions the dropdown-menu relative to its parent element.

.btn-group > .btn,
.btn-group-vertical > .btn {
  position: relative;
  float: left;
}

Alternatively, you can also add the following for similar results:

View the Updated Example here!

.dropdown {
    position: relative;
    display: inline-block;
    vertical-align: middle;
}

Answer №2

In my experience using Bootstrap 5, the reason why I was facing an issue was because I had forgotten to include the .dropdown class on my input element, contrary to what the accepted answer suggested.

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