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css/docs/content/components/forms.md
simurai a7547f4d34
Deprecate form validation (#2301)
2022-11-03 12:57:01 +09:00

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title path status source bundle
Forms components/forms Stable https://github.com/primer/css/tree/main/src/forms forms

Style individual form controls and utilize common layouts.

Overview:

  • We reset several elements' default styles for cross browser consistency and easier manipulation later. This includes <fieldset>s, WebKit validation bubbles, and most textual <input>s.
  • Specific types of textual <input>s are styled automatically, but .form-control is available should you need it.
  • Always declare a type on your <button>s.
  • Form layouts rely on form groups.

Kitchen sink

All our inputs and buttons side-by-side for easy testing of sizing and alignment with one another.

<p>
  <button class="btn" type="button">Button</button>
  <button class="btn" type="button" aria-expanded="false" aria-haspopup="true">
    Select menu
    <span class="dropdown-caret"></span>
  </button>
  <input class="form-control" type="text" placeholder="Standard input" aria-label="Repository description" />
  <input class="form-control input-monospace" type="text" placeholder="Monospace input" aria-label="SHA" />
  <select class="form-select" aria-label="Important decision">
    <option>Select</option>
    <option value="option 2">Option 2</option>
  </select>
</p>

<p>
  <button class="btn btn-sm" type="button">Small button</button>
  <button class="btn btn-sm" type="button" aria-expanded="false" aria-haspopup="true">
    Select menu
    <span class="dropdown-caret">
  </button>
  <input class="form-control input-sm" type="text" placeholder="Small input" aria-label="Repository description" />
  <select class="form-select select-sm" aria-label="Important decision">
    <option>Select</option>
    <option value="option 1">Option 1</option>
  </select>
</p>

Example form

Form controls in Primer CSS currently have no basic layout specified (this is by design). You'll need to use <fieldset>s, <div>s, or other elements and styles to rearrange them.

<form>
  <label for="name">Name</label>
  <input class="form-control" type="text" id="name" />

  <label for="email">Email address</label>
  <input class="form-control" type="email" id="email" />

  <label> <input type="checkbox" /> Remember me </label>

  <label> <input type="radio" id="potato" name="radio-group-example" checked /> Potato </label>
  <label> <input type="radio" id="tomato" name="radio-group-example" /> Tomato </label>

  <button class="btn" type="submit">Submit</button>
</form>

Inputs

Sizing

Make inputs smaller, larger, or full-width with an additional class.

Small

<form>
  <input class="form-control input-sm" type="text" placeholder="Small input" aria-label="Small input" />
</form>

Large

<form>
  <input class="form-control input-lg" type="text" placeholder="Large input" aria-label="Large input" />
</form>

Block

<form>
  <input class="form-control input-block" type="text" placeholder="Full-width input" aria-label="Full-width input" />
</form>

Input group

Attached an input and button to one another.

<form>
  <div class="input-group">
    <input class="form-control" type="text" placeholder="Username" aria-label="Username">
    <span class="input-group-button">
      <button class="btn" type="button" aria-label="Copy to clipboard">
        <!-- <%= octicon "clippy" %> -->
        <svg class="octicon octicon-clippy" viewBox="0 0 14 16" version="1.1" width="14" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M2 13h4v1H2v-1zm5-6H2v1h5V7zm2 3V8l-3 3 3 3v-2h5v-2H9zM4.5 9H2v1h2.5V9zM2 12h2.5v-1H2v1zm9 1h1v2c-.02.28-.11.52-.3.7-.19.18-.42.28-.7.3H1c-.55 0-1-.45-1-1V4c0-.55.45-1 1-1h3c0-1.11.89-2 2-2 1.11 0 2 .89 2 2h3c.55 0 1 .45 1 1v5h-1V6H1v9h10v-2zM2 5h8c0-.55-.45-1-1-1H8c-.55 0-1-.45-1-1s-.45-1-1-1-1 .45-1 1-.45 1-1 1H3c-.55 0-1 .45-1 1z"></path></svg>
      </button>
    </span>
  </div>
</form>

Customization

Form contrast

Textual form controls have a white background by default. You can change this to a light gray with .input-contrast.

<form>
  <input class="form-control" type="text" placeholder="Default input" aria-label="Default input" />
  <input class="form-control input-contrast" type="text" placeholder="Input with contrast" aria-label="Input with contrast" />
</form>

Disabled state

Add the disabled attribute to make a .form-control appear disabled.

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

Hide WebKit's contact info autofill icon

WebKit sometimes gets confused and tries to add an icon/dropdown to autofill contact information on fields that may not be appropriate (such as input for number of users). Use this class to override the display of this icon.

<form>
  <input
    class="form-control input-hide-webkit-autofill"
    placeholder="Hide Webkit's contact autofill on this input"
    type="text"
    aria-label="Hide Webkit's contact autofill on this input"
  />
</form>

Selects

Primer CSS adds light height and vertical-align styles to <select>s for all browsers to render them consistently with textual inputs.

<form>
  <select class="form-select" aria-label="Preference">
    <option>Choose an option</option>
    <option>Git</option>
    <option>Subversion</option>
    <option>Social Coding</option>
    <option>Beets</option>
    <option>Bears</option>
    <option>Battlestar Galactica</option>
  </select>
</form>

Small

Use the .select-sm class to resize both default and custom <select>s to match the size of our small buttons.

<select class="form-select select-sm" aria-label="Preference">
  <option>Choose an option</option>
  <option>Git</option>
  <option>Subversion</option>
  <option>Social Coding</option>
  <option>Beets</option>
  <option>Bears</option>
  <option>Battlestar Galactica</option>
</select>

<button class="btn btn-sm ml-1"> Small button</button>

Form groups

<form>
  <div class="form-group">
    <div class="form-group-header">
      <label for="example-text">Example Text</label>
    </div>
    <div class="form-group-body">
      <input class="form-control" type="text" value="Example Value" id="example-text" />
    </div>
  </div>

  <div class="form-group">
    <div class="form-group-header">
      <label for="example-select">Example Select</label>
    </div>
    <div class="form-group-body">
      <select class="form-select" id="example-select">
        <option>Choose an option</option>
        <option>Git</option>
        <option>Subversion</option>
        <option>Social Coding</option>
        <option>Beets</option>
        <option>Bears</option>
        <option>Battlestar Galactica</option>
      </select>
    </div>
  </div>

  <div class="form-group">
    <div class="form-group-header">
      <label for="example-textarea">Example Textarea</label>
    </div>
    <div class="form-group-body">
      <textarea class="form-control" id="example-textarea"></textarea>
    </div>
  </div>
</form>

Form group validation (deprecated)

These form validation styles are deprecated. Please use the TextField ViewComponent instead or refer to the design guidelines.

Convey success, errors and warnings for form groups. For github.com consider using the <auto-check> element to perform server-side validation on an input.

Success

If the input is valid, add the .successed class to the <div class="form-group"> element. Next add/update a success message to the .note element, as well as the .success class.

<form class="pb-6">
  <div class="form-group successed">
    <div class="form-group-header">
      <label for="username-input">Username</label>
    </div>
    <div class="form-group-body">
      <input
        class="form-control"
        type="text"
        value="monalisa"
        id="username-input"
        aria-describedby="username-input-validation"
      />
    </div>
    <p class="note success" id="username-input-validation">monalisa is available</p>
  </div>
</form>

Error

If the input is not valid, add the .errored class to the <div class="form-group"> element. Next add/update an error message to the .note element, as well as the .error class.

<form class="pb-6">
  <div class="form-group errored">
    <div class="form-group-header">
      <label for="username-input">Username</label>
    </div>
    <div class="form-group-body">
      <input
        class="form-control"
        type="text"
        value="monalisa"
        id="username-input"
        aria-describedby="username-input-validation"
      />
    </div>
    <p class="note error" id="username-input-validation">monalisa is not available. monalisa-beep, monalisa-cyber, or monalisa87 are available.</p>
  </div>
</form>

Warning

If the input should show a warning, add the .warn class to the <div class="form-group"> element. Next add/update a warning message to the .note element, as well as the .warning class.

<form class="pb-6">
<div class="form-group warn">
  <div class="form-group-header">
    <label for="username-input">Username</label>
  </div>
  <div class="form-group-body">
    <input
      class="form-control"
      type="text"
      value="monalisa-monalisa-monalisa-monalisa-"
      id="username-input"
      aria-describedby="username-input-validation"
    />
  </div>
  <p class="note warning" id="username-input-validation">36 of maximum 39 characters entered.</p>
</div>
</form>

Form actions

Align buttons to the right—via float: right on the buttons—in forms with .form-actions. The floats are automatically cleared for you.

<div class="form-actions">
  <button type="submit" class="btn btn-primary">Save changes</button>
  <button type="button" class="btn">Cancel</button>
</div>

Checkboxes and radios

Utilities to control alignment and styling of checkbox and radio controls.

<form>
  <div class="form-checkbox">
    <label>
      <input type="checkbox" checked="checked" aria-describedby="help-text-for-checkbox" />
      Available for hire
    </label>
    <p class="note" id="help-text-for-checkbox">
      This will do insanely <strong>awesome</strong> and <strong>amazing</strong> things!
    </p>
  </div>
</form>

You may also add emphasis to the label:

<form>
  <div class="form-checkbox">
    <label>
      <input type="checkbox" checked="checked" />
      <em class="highlight">Available for hire</em>
    </label>
  </div>
</form>

Toggle content visibility based on a checkbox or radio button state

Content that is hidden by default should only be done so if it is non-essential for the context of the surrounding content. Be sure to use the aria-live="polite" attribute on the parent label for added content to be announced when displayed.

<form>
  <div class="form-checkbox">
    <label>
      <input type="radio" name="hireme" />
      Not available for hire
    </label>
  </div>
  <div class="form-checkbox">
    <label aria-live="polite">
      <input type="radio" class="form-checkbox-details-trigger" name="hireme" />
      Available for hire
      <span class="form-checkbox-details text-normal">
        <span class="d-block mb-1">Available hours per week</span>
        <input type="text" name="" class="form-control input-contrast" size="3" />
        <span class="text-small color-fg-muted pl-2">hours per week</span>
      </span>
    </label>
  </div>
</form>

Radio group

Radio groups are tab like controls. Their blue border gives extra emphasis to what is selected.

<form>
  <div class="radio-group">
    <input class="radio-input" id="option-a" type="radio" name="options">
    <label class="radio-label" for="option-a">Option A</label>
    <input class="radio-input" id="option-b" type="radio" name="options">
    <label class="radio-label" for="option-b">Option B</label>
    <input class="radio-input" id="option-c" type="radio" name="options">
    <label class="radio-label" for="option-c">Option C</label>
  </div>
</form>

Adding octicon icons is also supported. To disable an option, use the disabled attribute.

<form>
  <div class="radio-group">
    <input class="radio-input" id="option-a" type="radio" name="options">
    <label class="radio-label" for="option-a">
      <svg class="octicon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z"></path></svg>
      Option A
    </label>
    <input class="radio-input" id="option-b" type="radio" name="options">
    <label class="radio-label" for="option-b">
      <svg class="octicon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path fill-rule="evenodd" d="M11.013 1.427a1.75 1.75 0 012.474 0l1.086 1.086a1.75 1.75 0 010 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 01-.927-.928l.929-3.25a1.75 1.75 0 01.445-.758l8.61-8.61zm1.414 1.06a.25.25 0 00-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 000-.354l-1.086-1.086zM11.189 6.25L9.75 4.81l-6.286 6.287a.25.25 0 00-.064.108l-.558 1.953 1.953-.558a.249.249 0 00.108-.064l6.286-6.286z"></path></svg>
      Option B
    </label>
    <input class="radio-input" id="option-c" type="radio" name="options" disabled>
    <label class="radio-label" for="option-c">
      <svg class="octicon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16"><path fill-rule="evenodd" d="M6.5 1.75a.25.25 0 01.25-.25h2.5a.25.25 0 01.25.25V3h-3V1.75zm4.5 0V3h2.25a.75.75 0 010 1.5H2.75a.75.75 0 010-1.5H5V1.75C5 .784 5.784 0 6.75 0h2.5C10.216 0 11 .784 11 1.75zM4.496 6.675a.75.75 0 10-1.492.15l.66 6.6A1.75 1.75 0 005.405 15h5.19c.9 0 1.652-.681 1.741-1.576l.66-6.6a.75.75 0 00-1.492-.149l-.66 6.6a.25.25 0 01-.249.225h-5.19a.25.25 0 01-.249-.225l-.66-6.6z"></path></svg>
      Option C
    </label>
  </div>
</form>