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Form Control

Custom styles, sizing, attention states, and other features can be used to modify textual form controls like <Inputs> and <textareas>.

<div class="mb-3">
  <label for="exampleFormControlInput1" class="form-label">Email address</label>
  <input type="email" class="form-control" id="exampleFormControlInput1" placeholder="name@example.com"/>
</div>
<div class="mb-3">
  <label for="exampleFormControlTextarea1" class="form-label">Example textarea</label>
  <textarea class="form-control" id="exampleFormControlTextarea1" rows="3"></textarea>
</div>
RESULT

Sizing #

Set heights using classes like .form-control-lg and .form-control-sm. 

<input class="form-control form-control-lg mb-3" type="text" placeholder=".form-control-lg" aria-label=".form-control-lg example"/>
<input class="form-control mb-3" type="text" placeholder="Default input" aria-label="default input example"/>
<input class="form-control form-control-sm mb-3" type="text" placeholder=".form-control-sm" aria-label=".form-control-sm example"/>
RESULT

Disabled #

To give an input a grayed-out appearance, stop pointer events, and prevent focusing, add the disabled boolean attribute. 

<input class="form-control" type="text" placeholder="Disabled input" aria-label="Disabled input example" disabled/>
<input class="form-control" type="text" value="Disabled readonly input" aria-label="Disabled input example" disabled readonly/>
RESULT

Readonly #

To prevent the value of an input from being changed, add the readonly boolean property to the input. Disabled inputs cannot be focused or selected, while read-only inputs can. 

<input class="form-control" type="text" value="Readonly input here..." aria-label="readonly input example" readonly/>
RESULT

Readonly plain text #

To remove the default form field styling and maintain the proper margin and padding, replace .form-control with .form-control-plaintext in your form code if you want the <input readonly> components to be treated as plain text. 

 <div class="mb-3 row">
    <label for="staticEmail" class="col-sm-2 col-form-label">Email</label>
    <div class="col-sm-10">
      <input type="text" readonly class="form-control-plaintext" id="staticEmail" value="email@example.com"/>
    </div>
  </div>
  <div class="mb-3 row">
    <label for="inputPassword" class="col-sm-2 col-form-label">Password</label>
    <div class="col-sm-10">
      <input type="password" class="form-control" id="inputPassword"/>
    </div>
  </div>
RESULT
<form class="row g-3">
  <div class="col-auto">
    <label for="staticEmail2" class="visually-hidden">Email</label>
    <input type="text" readonly class="form-control-plaintext" id="staticEmail2" value="email@example.com"/>
  </div>
  <div class="col-auto">
    <label for="inputPassword2" class="visually-hidden">Password</label>
    <input type="password" class="form-control" id="inputPassword2" placeholder="Password"/>
  </div>
  <div class="col-auto">
    <button type="submit" class="btn btn-primary mb-3">Confirm identity</button>
  </div>
</form>
RESULT

File input #

<div class="mb-3">
  <label for="formFile" class="form-label">Default file input example</label>
  <input class="form-control" type="file" id="formFile"/>
</div>
<div class="mb-3">
  <label for="formFileMultiple" class="form-label">Multiple files input example</label>
  <input class="form-control" type="file" id="formFileMultiple" multiple/>
</div>
<div class="mb-3">
  <label for="formFileDisabled" class="form-label">Disabled file input example</label>
  <input class="form-control" type="file" id="formFileDisabled" disabled/>
</div>
<div class="mb-3">
  <label for="formFileSm" class="form-label">Small file input example</label>
  <input class="form-control form-control-sm" id="formFileSm" type="file"/>
</div>
<div>
  <label for="formFileLg" class="form-label">Large file input example</label>
  <input class="form-control form-control-lg" id="formFileLg" type="file"/>
</div>
RESULT

Color #

Add .form-control-color to the < input > and type="color" to the element. The modifier class is used to override various browser quirks and specify fixed heights. 

<label for="exampleColorInput" class="form-label">Color picker</label>
<input type="color" class="form-control form-control-color" id="exampleColorInput" value="#563d7c" title="Choose your color"/>
RESULT

Datalists #

You can establish a group of "options" that can be accessed (and autocompleted) from within a "input" by using datalists. These are comparable to <choose> components but have additional restrictions on menu layout. Although most operating systems and browsers offer some support for <datalist> components, their appearance is, at best, inconsistent.

Learn more about support for datalist elements.

<label for="exampleDataList" class="form-label">Datalist example</label>
<input class="form-control" list="datalistOptions" id="exampleDataList" placeholder="Type to search..."/>
<datalist id="datalistOptions">
  <option value="San Francisco"/>
  <option value="New York"/>
  <option value="Seattle"/>
  <option value="Los Angeles"/>
  <option value="Chicago"/>
</datalist>
RESULT

Sass #

Variables #

$input-padding-y:                       $input-btn-padding-y;
$input-padding-x:                       $input-btn-padding-x;
$input-font-family:                     $input-btn-font-family;
$input-font-size:                       $input-btn-font-size;
$input-font-weight:                     $font-weight-base;
$input-line-height:                     $input-btn-line-height;

$input-padding-y-sm:                    $input-btn-padding-y-sm;
$input-padding-x-sm:                    $input-btn-padding-x-sm;
$input-font-size-sm:                    $input-btn-font-size-sm;

$input-padding-y-lg:                    $input-btn-padding-y-lg;
$input-padding-x-lg:                    $input-btn-padding-x-lg;
$input-font-size-lg:                    $input-btn-font-size-lg;

$input-bg:                              var(--#{$prefix}body-bg);
$input-disabled-color:                  null;
$input-disabled-bg:                     var(--#{$prefix}secondary-bg);
$input-disabled-border-color:           null;

$input-color:                           var(--#{$prefix}body-color);
$input-border-color:                    var(--#{$prefix}border-color);
$input-border-width:                    $input-btn-border-width;
$input-box-shadow:                      $box-shadow-inset;

$input-border-radius:                   var(--#{$prefix}border-radius);
$input-border-radius-sm:                var(--#{$prefix}border-radius-sm);
$input-border-radius-lg:                var(--#{$prefix}border-radius-lg);

$input-focus-bg:                        $input-bg;
$input-focus-border-color:              tint-color($component-active-bg, 50%);
$input-focus-color:                     $input-color;
$input-focus-width:                     $input-btn-focus-width;
$input-focus-box-shadow:                $input-btn-focus-box-shadow;

$input-placeholder-color:               var(--#{$prefix}secondary-color);
$input-plaintext-color:                 var(--#{$prefix}body-color);

$input-height-border:                   calc(#{$input-border-width} * 2); // stylelint-disable-line function-disallowed-list

$input-height-inner:                    add($input-line-height * 1em, $input-padding-y * 2);
$input-height-inner-half:               add($input-line-height * .5em, $input-padding-y);
$input-height-inner-quarter:            add($input-line-height * .25em, $input-padding-y * .5);

$input-height:                          add($input-line-height * 1em, add($input-padding-y * 2, $input-height-border, false));
$input-height-sm:                       add($input-line-height * 1em, add($input-padding-y-sm * 2, $input-height-border, false));
$input-height-lg:                       add($input-line-height * 1em, add($input-padding-y-lg * 2, $input-height-border, false));

$input-transition:                      border-color .15s ease-in-out, box-shadow .15s ease-in-out;

$form-color-width:                      3rem;

$form-label-* and $form-text-* are for our <label>s and .form-text component.

$form-label-margin-bottom:              .5rem;
$form-label-font-size:                  null;
$form-label-font-style:                 null;
$form-label-font-weight:                null;
$form-label-color:                      null;
$form-text-margin-top:                  .25rem;
$form-text-font-size:                   $small-font-size;
$form-text-font-style:                  null;
$form-text-font-weight:                 null;
$form-text-color:                       var(--#{$prefix}secondary-color);

$form-file-* are for file input.

$form-file-button-color:          $input-color;
$form-file-button-bg:             var(--#{$prefix}tertiary-bg);
$form-file-button-hover-bg:       var(--#{$prefix}secondary-bg);