Tag: bootstrap

Bootstrap Login Screen with Floating Labels

HTML

<!-- This snippet uses Font Awesome 5 Free as a dependency. You can download it at fontawesome.io! -->

<body>
  <div class="container">
    <div class="row">
      <div class="col-sm-9 col-md-7 col-lg-5 mx-auto">
        <div class="card card-signin my-5">
          <div class="card-body">
            <h5 class="card-title text-center">Sign In</h5>
            <form class="form-signin">
              <div class="form-label-group">
                <input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
                <label for="inputEmail">Email address</label>
              </div>

              <div class="form-label-group">
                <input type="password" id="inputPassword" class="form-control" placeholder="Password" required>
                <label for="inputPassword">Password</label>
              </div>

              <div class="custom-control custom-checkbox mb-3">
                <input type="checkbox" class="custom-control-input" id="customCheck1">
                <label class="custom-control-label" for="customCheck1">Remember password</label>
              </div>
              <button class="btn btn-lg btn-primary btn-block text-uppercase" type="submit">Sign in</button>
              <hr class="my-4">
              <button class="btn btn-lg btn-google btn-block text-uppercase" type="submit"><i class="fab fa-google mr-2"></i> Sign in with Google</button>
              <button class="btn btn-lg btn-facebook btn-block text-uppercase" type="submit"><i class="fab fa-facebook-f mr-2"></i> Sign in with Facebook</button>
            </form>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>

CSS

:root {
  --input-padding-x: 1.5rem;
  --input-padding-y: .75rem;
}

body {
  background: #007bff;
  background: linear-gradient(to right, #0062E6, #33AEFF);
}

.card-signin {
  border: 0;
  border-radius: 1rem;
  box-shadow: 0 0.5rem 1rem 0 rgba(0, 0, 0, 0.1);
}

.card-signin .card-title {
  margin-bottom: 2rem;
  font-weight: 300;
  font-size: 1.5rem;
}

.card-signin .card-body {
  padding: 2rem;
}

.form-signin {
  width: 100%;
}

.form-signin .btn {
  font-size: 80%;
  border-radius: 5rem;
  letter-spacing: .1rem;
  font-weight: bold;
  padding: 1rem;
  transition: all 0.2s;
}

.form-label-group {
  position: relative;
  margin-bottom: 1rem;
}

.form-label-group input {
  height: auto;
  border-radius: 2rem;
}

.form-label-group>input,
.form-label-group>label {
  padding: var(--input-padding-y) var(--input-padding-x);
}

.form-label-group>label {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  margin-bottom: 0;
  /* Override default `<label>` margin */
  line-height: 1.5;
  color: #495057;
  border: 1px solid transparent;
  border-radius: .25rem;
  transition: all .1s ease-in-out;
}

.form-label-group input::-webkit-input-placeholder {
  color: transparent;
}

.form-label-group input:-ms-input-placeholder {
  color: transparent;
}

.form-label-group input::-ms-input-placeholder {
  color: transparent;
}

.form-label-group input::-moz-placeholder {
  color: transparent;
}

.form-label-group input::placeholder {
  color: transparent;
}

.form-label-group input:not(:placeholder-shown) {
  padding-top: calc(var(--input-padding-y) + var(--input-padding-y) * (2 / 3));
  padding-bottom: calc(var(--input-padding-y) / 3);
}

.form-label-group input:not(:placeholder-shown)~label {
  padding-top: calc(var(--input-padding-y) / 3);
  padding-bottom: calc(var(--input-padding-y) / 3);
  font-size: 12px;
  color: #777;
}

.btn-google {
  color: white;
  background-color: #ea4335;
}

.btn-facebook {
  color: white;
  background-color: #3b5998;
}

/* Fallback for Edge
-------------------------------------------------- */

@supports (-ms-ime-align: auto) {
  .form-label-group>label {
    display: none;
  }
  .form-label-group input::-ms-input-placeholder {
    color: #777;
  }
}

/* Fallback for IE
-------------------------------------------------- */

@media all and (-ms-high-contrast: none),
(-ms-high-contrast: active) {
  .form-label-group>label {
    display: none;
  }
  .form-label-group input:-ms-input-placeholder {
    color: #777;
  }
}

References
https://startbootstrap.com/snippets/login/

Make any HTML element or Bootstrap component clickable

Add .stretched-link to a link to make its containing block clickable

<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card with stretched link</h5>
    <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
    <a href="#" class="btn btn-primary stretched-link">Go somewhere</a>
  </div>
</div>

References
https://getbootstrap.com/docs/4.3/utilities/stretched-link/

Spacing in Bootstrap Utilities

The classes are named using the format {property}{sides}-{size} for xs and {property}{sides}-{breakpoint}-{size} for sm, md, lg, and xl.

Examples

.mt-0 {
  margin-top: 0 !important;
}

.ml-1 {
  margin-left: ($spacer * .25) !important;
}

.px-2 {
  padding-left: ($spacer * .5) !important;
  padding-right: ($spacer * .5) !important;
}

.p-3 {
  padding: $spacer !important;
}

Horizontal centering

<div class="mx-auto" style="width: 200px;">
  Centered element
</div>

Negative margin

The syntax is nearly the same as the default, positive margin utilities, but with the addition of n before the requested size

.mt-n1 {
  margin-top: -0.25rem !important;
}

References
https://getbootstrap.com/docs/4.3/utilities/spacing/

Sizing in Bootstrap Utilities

<div style="width: 50%" class="border border-dark">
    <div class="bg-primary p-3 w-25">Width 25% relative to the parent</div>
    <div class="bg-primary p-3 w-50">Width 50% relative to the parent</div>
    <div class="bg-primary p-3 w-75">Width 75% relative to the parent</div>
    <div class="bg-primary p-3 w-100">Width 100% relative to the parent</div>
    <div class="bg-primary p-3">Width Auto relative to the parent</div>
    <div class="bg-primary p-3 vw-100">Width 100% relative to viewport</div>
    <div class="bg-primary p-3 min-vw-100">Min-width 100% relative to viewport</div>
</div>

References
https://getbootstrap.com/docs/4.3/utilities/sizing/

Nesting in Bootstrap Grid System

To nest your content with the default grid, add a new .row and set of .col-sm-* columns within an existing .col-sm-* column. Nested rows should include a set of columns that add up to 12 or fewer (it is not required that you use all 12 available columns).

<div class="container">
  <div class="row">
    <div class="col-sm-9">
      Level 1: .col-sm-9
      <div class="row">
        <div class="col-8 col-sm-6">
          Level 2: .col-8 .col-sm-6
        </div>
        <div class="col-4 col-sm-6">
          Level 2: .col-4 .col-sm-6
        </div>
      </div>
    </div>
  </div>
</div>

References
https://getbootstrap.com/docs/4.3/layout/grid/#margin-utilities

Offsetting columns using Margin utilities in Bootstrap

<div class="container">
  <div class="row">
    <div class="col-md-4">.col-md-4</div>
    <div class="col-md-4 ml-auto">.col-md-4 .ml-auto</div>
  </div>
  <div class="row">
    <div class="col-md-3 ml-md-auto">.col-md-3 .ml-md-auto</div>
    <div class="col-md-3 ml-md-auto">.col-md-3 .ml-md-auto</div>
  </div>
  <div class="row">
    <div class="col-auto mr-auto">.col-auto .mr-auto</div>
    <div class="col-auto">.col-auto</div>
  </div>
</div>

References
https://getbootstrap.com/docs/4.3/layout/grid/#margin-utilities

Offsetting columns using Offset classes in Bootstrap

<div class="container">
  <div class="row">
    <div class="col-md-4">.col-md-4</div>
    <div class="col-md-4 offset-md-4">.col-md-4 .offset-md-4</div>
  </div>
  <div class="row">
    <div class="col-md-3 offset-md-3">.col-md-3 .offset-md-3</div>
    <div class="col-md-3 offset-md-3">.col-md-3 .offset-md-3</div>
  </div>
  <div class="row">
    <div class="col-md-6 offset-md-3">.col-md-6 .offset-md-3</div>
  </div>
</div>

References
https://getbootstrap.com/docs/4.3/layout/grid/#offset-classes

Column breaks with Bootstrap Grid System

Breaking columns to a new line in flexbox requires a small hack: add an element with width: 100% wherever you want to wrap your columns to a new line. Normally this is accomplished with multiple .rows, but not every implementation method can account for this.

<div class="container">
  <div class="row">
    <div class="col-6 col-sm-3">.col-6 .col-sm-3</div>
    <div class="col-6 col-sm-3">.col-6 .col-sm-3</div>

    <!-- Force next columns to break to new line -->
    <div class="w-100"></div>

    <div class="col-6 col-sm-3">.col-6 .col-sm-3</div>
    <div class="col-6 col-sm-3">.col-6 .col-sm-3</div>
  </div>
</div>
<div class="container">
  <div class="row">
    <div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
    <div class="col-6 col-sm-4">.col-6 .col-sm-4</div>

    <!-- Force next columns to break to new line at md breakpoint and up -->
    <div class="w-100 d-none d-md-block"></div>

    <div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
    <div class="col-6 col-sm-4">.col-6 .col-sm-4</div>
  </div>
</div>

References
https://getbootstrap.com/docs/4.3/layout/grid/#column-breaks