Bootstrap 5 popup form

Here’s a simple way to create a responsive Bootstrap 5 Modal Form with a dark background.

Final output:

1. The form I am going to place in the Bootstrap modal is the Bootstrap Login Form, which I made some time ago.

<div class="myform bg-dark">
    <h1 class="text-center">Login Form</h1>
    <form>
        <div class="mb-3 mt-4">
            <label for="exampleInputEmail1" class="form-label">Email address</label>
            <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
        </div>
        <div class="mb-3">
            <label for="exampleInputPassword1" class="form-label">Password</label>
            <input type="password" class="form-control" id="exampleInputPassword1">
        </div>
        <button type="submit" class="btn btn-light mt-3">LOGIN</button>
        <p>Not a member? <a href="#">Signup now</a></p>
    </form>
</div>

Output:

2. Let’s use this Bootstrap modal component.

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

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

Output:

3. Add the form to the modal-body. Place the close button from the header inside the modal-body as well and remove the header and footer. (You can also try replacing the title in the header and signup option in the footer)

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

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-body">
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        <div class="myform bg-dark">
            <h1 class="text-center">Login Form</h1>
            <form>
                <div class="mb-3 mt-4">
                    <label for="exampleInputEmail1" class="form-label">Email address</label>
                    <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
                </div>
                <div class="mb-3">
                    <label for="exampleInputPassword1" class="form-label">Password</label>
                    <input type="password" class="form-control" id="exampleInputPassword1">
                </div>
                <button type="submit" class="btn btn-light mt-3">LOGIN</button>
                <p>Not a member? <a href="#">Signup now</a></p>
            </form>
        </div>
      </div>
    </div>
  </div>
</div>

Output:

4. Let’s tweak it a bit to fit the modal. Set the max-width of the form to 100%.

.myform {
  max-width: 100%;
}

Remove the default padding from modal-body.

.modal-body {
  padding: 0;
}

Output:

5. Use Bootstrap class modal-dialog-centered to vertically center align the modal.

<div class="modal-dialog modal-dialog-centered">

Change the box-shadow as well.

.myform {
  box-shadow: 0 4px 6px 0 rgba(22, 22, 26, 0.18);
}

Output:

6. To place the close button in the top right corner of the modal, set its position to absolute, and align it accordingly.

.btn-close {
  position: absolute;
  right: 0;
  padding: 1em;
}

Since we have a dark background, use the white variant of the close button by adding the class btn-close-white.

<button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>

Lastly, reduce the width of the modal and center align it.

.modal-content {
  width: 80%;
  margin: 0 auto;
}

Output:

HTML

<button type="button" class="btn btn-dark" data-bs-toggle="modal" data-bs-target="#ModalForm">
    Launch Modal Form
  </button>
<div class="modal fade" id="ModalForm" tabindex="-1" aria-labelledby="ModalFormLabel" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
      <div class="modal-content">
        <div class="modal-body">
            <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
            <div class="myform bg-dark">
                <h1 class="text-center">Login Form</h1>
                <form>
                    <div class="mb-3 mt-4">
                        <label for="exampleInputEmail1" class="form-label">Email address</label>
                        <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
                    </div>
                    <div class="mb-3">
                        <label for="exampleInputPassword1" class="form-label">Password</label>
                        <input type="password" class="form-control" id="exampleInputPassword1">
                    </div>
                    <button type="submit" class="btn btn-light mt-3">LOGIN</button>
                    <p>Not a member? <a href="#">Signup now</a></p>
                </form>
            </div>
        </div>
      </div>
    </div>
</div>

CSS

.modal-content {
  width: 80%;
  margin: 0 auto;
}
.modal-body {
  padding: 0;
}
.btn-close {
  position: absolute;
  right: 0;
  padding: 1em;
}
h1 {
  font-size: 2.3em;
  font-weight: bold;
}
.myform {
  padding: 2em;
  max-width: 100%;
  color: #fff;
  box-shadow: 0 4px 6px 0 rgba(22, 22, 26, 0.18);
}
@media (max-width: 576px) {
  .myform {
    max-width: 90%;
    margin: 0 auto;
  }
}
.form-control:focus {
  box-shadow: inset 0 -1px 0 #7e7e7e;
}
.form-control {
  background-color: inherit;
  color: #fff;
  padding-left: 0;
  border: 0;
  border-radius: 0;
  border-bottom: 1px solid #fff;
}
.myform .btn {
  width: 100%;
  font-weight: 800;
  background-color: #fff;
  border-radius: 0;
  padding: 0.5em 0;
}
.myform .btn:hover {
  background-color: inherit;
  color: #fff;
  border-color: #fff;
}
p {
  text-align: center;
  padding-top: 2em;
  color: grey;
}
p a {
  color: #e1e1e1;
  text-decoration: none;
}
p a:hover {
  color: #fff;
}