Pure CSS Bootstrap Modal

CSS only toggle Bootstrap modal. No JavaScript required. Click the following button to see demo.

The above demo apply the technique of Semantic UI modal [2] to Bootstrap modal.

The following is the source code for above demo.


<!-- you can put the following line in your html head -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

<!-- Pseudo-Button trigger modal -->
<label type="button" class="btn btn-primary" for="element-toggle">
  Launch demo modal
<input id="element-toggle" type="checkbox" />

<!-- Modal -->
<div class="modal fade show" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <label for="element-toggle" type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
      <div class="modal-body">
      <div class="modal-footer">
        <label for="element-toggle" type="button" class="btn btn-secondary" data-dismiss="modal">Close</label>

The modal trigger consists of visible label and invisible input checkbox elements. We apply .btn class to the label element to make it look like a button. The Close and × button in the modal is also a label element. If users click on the label element, the visibility of the modal is toggled.


#element-toggle {
  display: none;
#element-toggle:checked ~ #exampleModal {
  display: block;

Only two rules in CSS code:

  • First rule make input checkbox element invisible.
  • Second rule toggles the visibility of the modal when users click on the label elements.

Tested on:

  • Chromium 69.0.3497.81 on Ubuntu 18.04 (64-bit)
  • Bootstrap 4.1.3


[1]Bulma Modal with Pure CSS Toggle
[2]Pure CSS Semantic UI Modal