How to make width of dropdown-menu equal to width of it's parent in bootstrap 4

Question

I am creating a dropdown in bootstrap 4. I placed the dropdown-toggle button and dropdown-menu in a div element with class="container" I want the dropdown toggle and dropdown-menu to take full width of its parent element. I wrote this code for that

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">

<body>
  <div class="container">
    <button class="dropdown-toggle btn-block" data-toggle="dropdown">
      dropdown
    </button>
    <div class="dropdown-menu">
      <a href="" class="dropdown-item">one</a>
      <a href="" class="dropdown-item">two</a>
      <a href="" class="dropdown-item">three</a>
      <a href="" class="dropdown-item">four</a>
    </div>
</div>
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

</body>

The dropdown-toggle button takes up the full width of it's parent div. But, When I clicked on dropdown-toggle button I observed that the dropdown-menu is'nt taking full width. I want the width of drop dropdown-menu to be equal to it's parent width how can I do that? (I tried to use width:inherit; property but that did'nt worked properly)

score 6 · Answer 1 · answered Sep 09 '18 at 11:36

You don't need extra CSS. Just use the display="static" dropdown option, and the w-100 and position-static class in the dropdown to make it take up 100% of parent width.

<div class="container">
    <button class="dropdown-toggle btn-block" data-toggle="dropdown" data-display="static">
        dropdown
    </button>
    <div class="dropdown-menu position-static w-100">
        <a href="" class="dropdown-item">one</a>
        <a href="" class="dropdown-item">two</a>
        <a href="" class="dropdown-item">three</a>
        <a href="" class="dropdown-item">four</a>
    </div>
</div>

https://www.codeply.com/go/5GjATutCBb

Also see: How to make a Bootstrap 4 full width dropdown in Navbar?

Hash · Accepted Answer · 2018-10-21T06:04:42.267

dropdown-menu has position:absolute property. So, adding width:100%; will make the dropdown-menu to take full width of the page instead of taking full width of container. To make the dropdown-menu take the width of it's parent element make the parent element's positioning relative. To solve the problem first Add class="position-relative" attribute to the parent element of dropdown-menu. Now add w-100 to the class attribute of the dropdown-menu div.

<div class="container position-relative">
<button class="dropdown-toggle btn-block" data-toggle="dropdown">
  dropdown
</button>
<div class="dropdown-menu w-100">
  <a href="" class="dropdown-item">one</a>
  <a href="" class="dropdown-item">two</a>
  <a href="" class="dropdown-item">three</a>
  <a href="" class="dropdown-item">four</a>
</div>

Great, this principle will work with stuff outside of bootstrap too if you code the CSS styles yourself. Thanks! — Jake, Mar 16 '20 at 10:19

score -1 · Answer 3 · edited Sep 09 '18 at 09:43

-1

You can add min-width: 100% to the dropdown-menu class

edited Sep 09 '18 at 09:43

Richard

1,289
12
25

answered Sep 09 '18 at 09:35

Mila Lysenko

94
1
3

How to make width of dropdown-menu equal to width of it's parent in bootstrap 4

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