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Checks and radios

Create consistent cross-browser and cross-device checkboxes and radios with our completely rewritten checks component.

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Approach

Browser default checkboxes and radios are replaced with the help of .form-check, a series of classes for both input types that improves the layout and behavior of their HTML elements, that provide greater customization and cross browser consistency. Checkboxes are for selecting one or several options in a list, while radios are for selecting one option from many.

Structurally, our <input>s and <label>s are sibling elements as opposed to an <input> within a <label>. This is slightly more verbose as you must specify id and for attributes to relate the <input> and <label>. We use the sibling selector (~) for all our <input> states, like :checked or :disabled. When combined with the .form-check-label class, we can easily style the text for each item based on the <input>’s state.

Our checks use custom Boosted icons to indicate checked or indeterminate states.

Checks

Default checkbox

Checked checkbox

<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="flexCheckDefault">
  <label class="form-check-label" for="flexCheckDefault">
    Default checkbox
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="flexCheckChecked" checked>
  <label class="form-check-label" for="flexCheckChecked">
    Checked checkbox
  </label>
</div>

Indeterminate

Checkboxes can utilize the :indeterminate pseudo class when manually set via JavaScript (there is no available HTML attribute for specifying it).

Indeterminate checkbox

<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="flexCheckIndeterminate">
  <label class="form-check-label" for="flexCheckIndeterminate">
    Indeterminate checkbox
  </label>
</div>

Disabled

Add the disabled attribute and the associated <label>s are automatically styled to match with a lighter color to help indicate the input’s state.

Disabled checkbox

Disabled checked checkbox

<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="flexCheckDisabled" disabled>
  <label class="form-check-label" for="flexCheckDisabled">
    Disabled checkbox
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="flexCheckCheckedDisabled" checked disabled>
  <label class="form-check-label" for="flexCheckCheckedDisabled">
    Disabled checked checkbox
  </label>
</div>

Radios

Default radio

Default checked radio

<div class="form-check">
  <input class="form-check-input" type="radio" name="flexRadioDefault" id="flexRadioDefault1">
  <label class="form-check-label" for="flexRadioDefault1">
    Default radio
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="radio" name="flexRadioDefault" id="flexRadioDefault2" checked>
  <label class="form-check-label" for="flexRadioDefault2">
    Default checked radio
  </label>
</div>

Disabled

Add the disabled attribute and the associated <label>s are automatically styled to match with a lighter color to help indicate the input’s state.

Disabled radio

Disabled checked radio

<div class="form-check">
  <input class="form-check-input" type="radio" name="flexRadioDisabled" id="flexRadioDisabled" disabled>
  <label class="form-check-label" for="flexRadioDisabled">
    Disabled radio
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="radio" name="flexRadioDisabled" id="flexRadioCheckedDisabled" checked disabled>
  <label class="form-check-label" for="flexRadioCheckedDisabled">
    Disabled checked radio
  </label>
</div>

Switches

A switch has the markup of a custom checkbox but uses the .form-switch class to render a toggle switch. Switches also support the disabled attribute.

Default switch checkbox input

Checked switch checkbox input

Disabled switch checkbox input

Disabled checked switch checkbox input

<div class="form-check form-switch">
  <input class="form-check-input" type="checkbox" id="flexSwitchCheckDefault">
  <label class="form-check-label" for="flexSwitchCheckDefault">Default switch checkbox input</label>
</div>
<div class="form-check form-switch">
  <input class="form-check-input" type="checkbox" id="flexSwitchCheckChecked" checked>
  <label class="form-check-label" for="flexSwitchCheckChecked">Checked switch checkbox input</label>
</div>
<div class="form-check form-switch">
  <input class="form-check-input" type="checkbox" id="flexSwitchCheckDisabled" disabled>
  <label class="form-check-label" for="flexSwitchCheckDisabled">Disabled switch checkbox input</label>
</div>
<div class="form-check form-switch">
  <input class="form-check-input" type="checkbox" id="flexSwitchCheckCheckedDisabled" checked disabled>
  <label class="form-check-label" for="flexSwitchCheckCheckedDisabled">Disabled checked switch checkbox input</label>
</div>

Default (stacked)

By default, any number of checkboxes and radios that are immediate sibling will be vertically stacked and appropriately spaced with .form-check.

Default checkbox

Disabled checkbox

<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="defaultCheck1">
  <label class="form-check-label" for="defaultCheck1">
    Default checkbox
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="checkbox" value="" id="defaultCheck2" disabled>
  <label class="form-check-label" for="defaultCheck2">
    Disabled checkbox
  </label>
</div>

Default radio

Second default radio

Disabled radio

<div class="form-check">
  <input class="form-check-input" type="radio" name="exampleRadios" id="exampleRadios1" value="option1" checked>
  <label class="form-check-label" for="exampleRadios1">
    Default radio
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="radio" name="exampleRadios" id="exampleRadios2" value="option2">
  <label class="form-check-label" for="exampleRadios2">
    Second default radio
  </label>
</div>
<div class="form-check">
  <input class="form-check-input" type="radio" name="exampleRadios" id="exampleRadios3" value="option3" disabled>
  <label class="form-check-label" for="exampleRadios3">
    Disabled radio
  </label>
</div>

Inline

Group checkboxes or radios on the same horizontal row by adding .form-check-inline to any .form-check.

3 (disabled)

<div class="form-check form-check-inline">
  <input class="form-check-input" type="checkbox" id="inlineCheckbox1" value="option1">
  <label class="form-check-label" for="inlineCheckbox1">1</label>
</div>
<div class="form-check form-check-inline">
  <input class="form-check-input" type="checkbox" id="inlineCheckbox2" value="option2">
  <label class="form-check-label" for="inlineCheckbox2">2</label>
</div>
<div class="form-check form-check-inline">
  <input class="form-check-input" type="checkbox" id="inlineCheckbox3" value="option3" disabled>
  <label class="form-check-label" for="inlineCheckbox3">3 (disabled)</label>
</div>

3 (disabled)

<div class="form-check form-check-inline">
  <input class="form-check-input" type="radio" name="inlineRadioOptions" id="inlineRadio1" value="option1">
  <label class="form-check-label" for="inlineRadio1">1</label>
</div>
<div class="form-check form-check-inline">
  <input class="form-check-input" type="radio" name="inlineRadioOptions" id="inlineRadio2" value="option2">
  <label class="form-check-label" for="inlineRadio2">2</label>
</div>
<div class="form-check form-check-inline">
  <input class="form-check-input" type="radio" name="inlineRadioOptions" id="inlineRadio3" value="option3" disabled>
  <label class="form-check-label" for="inlineRadio3">3 (disabled)</label>
</div>

Toggle buttons

Create button-like checkboxes and radio buttons by using .btn styles rather than .form-check-label on the <label> elements. These toggle buttons can further be grouped in a button group if needed.

Checkbox toggle buttons

Single toggle

<input type="checkbox" class="btn-check" id="btn-check" autocomplete="off">
<label class="btn btn-primary" for="btn-check">Single toggle</label>

Checked

<input type="checkbox" class="btn-check" id="btn-check-2" checked autocomplete="off">
<label class="btn btn-primary" for="btn-check-2">Checked</label>

Disabled

<input type="checkbox" class="btn-check" id="btn-check-3" autocomplete="off" disabled>
<label class="btn btn-primary" for="btn-check-3">Disabled</label>

Visually, these checkbox toggle buttons are identical to the button plugin toggle buttons. However, they are conveyed differently by assistive technologies: the checkbox toggles will be announced by screen readers as “checked”/“not checked” (since, despite their appearance, they are fundamentally still checkboxes), whereas the button plugin toggle buttons will be announced as “button”/“button pressed”. The choice between these two approaches will depend on the type of toggle you are creating, and whether or not the toggle will make sense to users when announced as a checkbox or as an actual button.

Radio toggle buttons

Boosted requires to group its radio toggle buttons in a button group to display properly.

Checked Radio Disabled Radio

<div class="btn-group" role="group">
  <input type="radio" class="btn-check" name="options" id="option1" autocomplete="off" checked>
  <label class="btn btn-secondary" for="option1">Checked</label>

  <input type="radio" class="btn-check" name="options" id="option2" autocomplete="off">
  <label class="btn btn-secondary" for="option2">Radio</label>

  <input type="radio" class="btn-check" name="options" id="option3" autocomplete="off" disabled>
  <label class="btn btn-secondary" for="option3">Disabled</label>

  <input type="radio" class="btn-check" name="options" id="option4" autocomplete="off">
  <label class="btn btn-secondary" for="option4">Radio</label>
</div>

With icon

Add .btn-icon with an embedded icon to get consistent squared icon buttons working as toggle.

<div class="btn-group" role="group">
  <input type="radio" class="btn-check" name="icons" id="option5" autocomplete="off" checked>
  <label class="btn btn-icon" for="option5">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#day"/>
    </svg>
    <span class="visually-hidden">Day</span>
  </label>
  <input type="radio" class="btn-check" name="icons" id="option6" autocomplete="off">
  <label class="btn btn-icon" for="option6">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#week"/>
    </svg>
    <span class="visually-hidden">Week</span>
  </label>
  <input type="radio" class="btn-check" name="icons" id="option7" autocomplete="off">
  <label class="btn btn-icon" for="option7">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#month"/>
    </svg>
    <span class="visually-hidden">Month</span>
  </label>
</div>

Drop borders using .btn-no-outline, too.

<div class="btn-group" role="group">
  <input type="radio" class="btn-check" name="icons" id="option8" autocomplete="off" checked>
  <label class="btn btn-icon btn-no-outline" for="option8">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#day"/>
    </svg>
    <span class="visually-hidden">Day</span>
  </label>
  <input type="radio" class="btn-check" name="icons" id="option9" autocomplete="off">
  <label class="btn btn-icon btn-no-outline" for="option9">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#week"/>
    </svg>
    <span class="visually-hidden">Week</span>
  </label>
  <input type="radio" class="btn-check" name="icons" id="option10" autocomplete="off">
  <label class="btn btn-icon btn-no-outline" for="option10">
    <svg width="1.25rem" height="1.25rem" fill="currentColor">
      <use xlink:href="/docs/5.0/assets/img/boosted-sprite.svg#month"/>
    </svg>
    <span class="visually-hidden">Month</span>
  </label>
</div>

Sass

Variables

$form-check-input-width:                  1em;
$form-check-min-height:                   $font-size-base * $input-btn-line-height;
$form-check-padding-start:                $form-check-input-width + .5em;
$form-check-margin-bottom:                .125rem;
$form-check-label-color:                  null;
$form-check-label-cursor:                 null;
$form-check-transition:                   null;

$form-check-input-active-filter:          null;
$form-check-input-active-bg-color:        $component-active-bg; // Boosted mod

$form-check-input-bg:                     $input-bg;
$form-check-input-border:                 $border-width solid $input-border-color;
$form-check-input-border-radius:          0;
$form-check-radio-border-radius:          50%;
$form-check-input-focus-border:           null;
$form-check-input-focus-box-shadow:       $input-btn-focus-box-shadow;

$form-check-input-checked-color:          $component-active-color;
$form-check-input-checked-bg-color:       $component-active-bg;
$form-check-input-checked-border-color:   $form-check-input-checked-bg-color;
$form-check-input-checked-bg-image:       var(--#{$boosted-variable-prefix}check-icon);
$form-check-input-disabled-color:         $gray-900; // Boosted mod
$form-check-radio-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='2' fill='#{$form-check-input-checked-color}'/></svg>");

$form-check-input-indeterminate-color:          color-contrast($component-active-color);
$form-check-input-indeterminate-bg-color:       $component-active-color;
$form-check-input-indeterminate-border-color:   $form-check-input-indeterminate-bg-color;
$form-check-input-indeterminate-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 3'><path fill='#{$form-check-input-indeterminate-color}' d='M0 0h10v3H0z'/></svg>");

$form-check-input-disabled-opacity:        null;
$form-check-label-disabled-opacity:        null;
$form-check-btn-check-disabled-opacity:    null;

$form-check-inline-margin-end:    1rem;