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HTML

              
                <h1>Focus Tests June 2021</h1>

<div class="grid">
  <h2>Regular :focus</h2>

  <div class="focus">
    <a href="#0">Link</a>

    <button>Button</button>

    <input type="submit">
  </div>

  <div class="results">
    <dl>
      <dt>Chrome</dt>
      <dd>Keyboard Tab: :focus style</dd>
      <dd>Mouse Click: :focus style</dd>

      <dt>Firefox</dt>
      <dd>Keyboard Tab: :focus style + UA :focus style</dd>
      <dd>Mouse Click: :focus style</dd>

      <dt>Safari</dt>
      <dd>Keyboard Tab: :focus styles</dd>
      <dd>Mouse Click: No style</dd>
    </dl>
  </div>

  <h2>Focus Trick :focus:not(:focus-visible)</h2>

  <div class="focus-trick">
    <a href="#0">Link</a>

    <button>Button</button>

    <input type="submit">
  </div>

  <div class="results">
    <dl>
      <dt>Chrome</dt>
      <dd>Keyboard Tab: UA Focus Styles Only</dd>
      <dd>Mouse Click: Trick styles only</dd>

      <dt>Firefox</dt>
      <dd>Keyboard Tab: UA Focus Styles Only</dd>
      <dd>Mouse Click: Trick styles only</dd>

      <dt>Safari</dt>
      <dd>Keyboard Tab: UA Focus Styles Only</dd>
      <dd>Mouse Click: No style</dd>
    </dl>
  </div>

  <h2>Only :focus-visible</h2>

  <div class="focus-visible">
    <a href="#0">Link</a>

    <button>Button</button>

    <input type="submit">
  </div>

  <div class="results">
    <dl>
      <dt>Chrome</dt>
      <dd>Keyboard Tab: :focus-visible style</dd>
      <dd>Mouse Click: No style</dd>

      <dt>Firefox</dt>
      <dd>Keyboard Tab: :focus-visible style</dd>
      <dd>Mouse Click: No style</dd>

      <dt>Safari</dt>
      <dd>Keyboard Tab: UA Only Style</dd>
      <dd>Mouse Click: No style</dd>
    </dl>
  </div>

  <h2>Full Trick: :focus + :focus:not(:focus-visible)</h2>

  <div class="focus-full-trick">
    <a href="#0">Link</a>

    <button>Button</button>

    <input type="submit">
  </div>

  <div class="results">
    <dl>
      <dt>Chrome</dt>
      <dd>Keyboard Tab: Trick styles</dd>
      <dd>Mouse Click: Trick styles</dd>

      <dt>Firefox</dt>
      <dd>Keyboard Tab: Trick styles + UA focus styles</dd>
      <dd>Mouse Click: Trick styles</dd>

      <dt>Safari</dt>
      <dd>Keyboard Tab: Trick styles</dd>
      <dd>Mouse Click: No style</dd>
    </dl>
  </div>
</div>
              
            
!

CSS

              
                .focus :focus {
  outline: 5px solid red;
}

.focus-trick :focus:not(:focus-visible) {
  outline: 5px solid blue;
}

.focus-visible :focus-visible {
  outline: 5px solid green;
}

.focus-full-trick :focus {
  /* bold style for keyboard tabbing */
  outline: 5px solid pink;
}
.focus-full-trick :focus:not(:focus-visible) {
  /* chill style for mouse clicks */
  outline: 1px solid pink;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.grid h2 {
  grid-column: 1 / -1;
}
body {
  font: 105%/1.4 system-ui;
}

              
            
!

JS

              
                
              
            
!
999px

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