Modal

Use Bootstrap’s JavaScript modal plugin to add dialogs to your site for lightboxes, user notifications, or completely custom content.

How it works

Toggle a working modal demo by clicking the button below. It will slide down and fade in from the top of the page.

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" 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>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        Woohoo, you're reading this text in a modal!
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

Vertically centered

Add .modal-dialog-centered to .modal-dialog to vertically center the modal.

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModalCenter">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="exampleModalCenter" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
  <div class="modal-dialog modal-dialog-centered" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalCenterTitle">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

Sizing and content

Note: Modal support any content.

Utilize the Bootstrap grid system within a modal by nesting .container-fluid within the .modal-body. Then, use the normal grid system classes as you would anywhere else.

Modals have three optional sizes, available via modifier classes to be placed on a .modal-dialog. These sizes kick in at certain breakpoints to avoid horizontal scrollbars on narrower viewports.

<div class="dropdown" data-dropdown-event="hover">
  <button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown"
    aria-haspopup="true" aria-expanded="false">
    Dropdown Hover
  </button>
  <div class="dropdown-menu">
    <a class="dropdown-item" href="#">Another action</a>
    <a class="dropdown-item" href="#">Something else here</a>
    <a class="dropdown-item" href="#">Anything else</a>
    <div class="dropdown-divider"></div>
    <a class="dropdown-item" href="#">Cool, Support Divider</a>
  </div>
</div>

<div class="dropdown">
<button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown"
  aria-haspopup="true" aria-expanded="false">
  Dropdown Content
</button>
<div class="dropdown-menu">
  <form class="px-4 py-3">
    <div class="form-group">
      <label for="exampleDropdownFormEmail1">Email address</label>
      <input type="email" class="form-control" id="exampleDropdownFormEmail1"
        placeholder="email@example.com">
    </div>
    <div class="form-group">
      <label for="exampleDropdownFormPassword1">Password</label>
      <input type="password" class="form-control" id="exampleDropdownFormPassword1"
        placeholder="Password">
    </div>
    <div class="form-group">
      <div class="form-check">
        <input type="checkbox" class="form-check-input" id="dropdownCheck">
        <label class="form-check-label" for="dropdownCheck">
          Remember me
        </label>
      </div>
    </div>
    <button type="submit" class="btn btn-primary">Sign in</button>
  </form>
</div>
</div>

<div class="dropdown" style="width: 300px">
<button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown"
  aria-haspopup="true" aria-expanded="false">
  Dropdown Large
</button>
<div class="dropdown-menu">
  <div class="p-4">
    <h6>
      Hello from dropdown <i class="far fa-smile text-primary"></i>
    </h6>
    <p class="mb-0">
      Nunc placerat mi id nisi interdm they mtolis. Praesient is haretra justo ught scel
      erisque placer.
    </p>
  </div>
</div>
</div>

For more details please visit Bootstrap official site. Bootstrap Documentation