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Improve the fallback example for :focus-visible #19993

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merged 7 commits into from
Aug 28, 2022
Merged

Improve the fallback example for :focus-visible #19993

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db7ae05
Improve the fallback example for :focus-visible
firefoxic Aug 26, 2022
49dbdcd
Update the section heading
firefoxic Aug 26, 2022
1627421
Improve text
firefoxic Aug 28, 2022
aee0ee4
Improve code comment
firefoxic Aug 28, 2022
5456598
Improve fallback comment
firefoxic Aug 28, 2022
a3342f5
Remove unwanted part
firefoxic Aug 28, 2022
3fd615a
Fix test failure (sorry)
teoli2003 Aug 28, 2022
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44 changes: 20 additions & 24 deletions files/en-us/web/css/_colon_focus-visible/index.md
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Expand Up @@ -57,43 +57,39 @@ input, button {

{{EmbedLiveSample("Basic_example", "100%", 300)}}

### Selectively showing the focus indicator
### Providing a :focus fallback

A custom control, such as a custom element button, can use `:focus-visible` to selectively apply a focus indicator only on keyboard-focus. This matches the native focus behavior for controls like {{htmlelement("button")}}.
If your code has to work in old browser versions that do not support `:focus-visible`, check supports of `:focus-visible` with {{cssxref("@supports")}} and repeat the same focus styling in it, but inside a `:focus` rule. Note that even if you do not specify anything at all for `:focus`, old browsers will simply display the native outline, which can be enough.

```html
<button class="custom-button">Click Me</button>
<button class="button with-fallback" type="button">
Button with fallback
</button>
<button class="button without-fallback" type="button">
Button without fallback
</button>
```

```css
.custom-button {
display: inline-block;
.button {
margin: 10px;
border: 2px solid darkgray;
border-radius: 4px;
}

.custom-button:focus {
/* Provide a fallback style for browsers
that don't support :focus-visible */
outline: 2px solid red;
background: lightgrey;
.button:focus-visible {
/* Draw the focus when :focus-visible is supported */
outline: 3px solid deepskyblue;
outline-offset: 3px;
}

@supports selector(:focus-visible) {
.custom-button:focus {
/* Remove the focus indicator on mouse-focus for browsers
that do support :focus-visible */
outline: none;
background: transparent;
@supports not selector(:focus-visible) {
.button.with-fallback:focus {
/* Fallback for browsers without :focus-visible support */
outline: 3px solid deepskyblue;
outline-offset: 3px;
}
}

.custom-button:focus-visible {
/* Draw a very noticeable focus style for
keyboard-focus on browsers that do support
:focus-visible */
outline: 4px dashed darkorange;
background: transparent;
}
```

{{EmbedLiveSample("Selectively_showing_the_focus_indicator", "100%", 72)}}
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