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added the experimental release note of @starting-style #33679

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merged 6 commits into from
Jun 10, 2024
Merged

added the experimental release note of @starting-style #33679

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006b400
added the experimental release note of @starting-style
dletorey May 20, 2024
23257d0
Merge branch 'main' into 33518-starting-style-ff-release
dletorey May 20, 2024
be5d032
Merge branch 'main' into 33518-starting-style-ff-release
dletorey May 21, 2024
f6c39f9
Merge branch 'main' into 33518-starting-style-ff-release
dletorey Jun 3, 2024
5701cda
Merge branch 'main' into 33518-starting-style-ff-release
dletorey Jun 10, 2024
d7b41ef
Update files/en-us/mozilla/firefox/experimental_features/index.md
dletorey Jun 10, 2024
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42 changes: 41 additions & 1 deletion files/en-us/mozilla/firefox/experimental_features/index.md
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Expand Up @@ -1045,6 +1045,46 @@ For more details, see [Firefox bug 1823463](https://bugzil.la/1823463) for the `
</tbody>
</table>

### `@starting-style` at-rule

The CSS [`@starting-style`](/en-US/docs/Web/CSS/@starting-style) at-rule allows you to set the starting styles of an element that transitions. This is particularly useful for elements that are hidden from view on the first paint such as [`popover`](/en-US/docs/Web/HTML/Global_attributes/popover) or ['dialog'](/en-US/docs/Web/HTML/Element/dialog). For more details, see [Firefox bug 1834876](https://bugzil.la/1834876).
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<table>
<thead>
<tr>
<th>Release channel</th>
<th>Version added</th>
<th>Enabled by default?</th>
</tr>
</thead>
<tbody>
<tr>
<th>Nightly</th>
<td>127</td>
<td>Yes</td>
</tr>
<tr>
<th>Developer Edition</th>
<td>127</td>
<td>No</td>
</tr>
<tr>
<th>Beta</th>
<td>127</td>
<td>No</td>
</tr>
<tr>
<th>Release</th>
<td>127</td>
<td>No</td>
</tr>
<tr>
<th>Preference name</th>
<td colspan="2"><code>layout.css.starting-style-at-rules.enabled</code></td>
</tr>
</tbody>
</table>

### Symmetrical `letter-spacing`

The CSS `letter-spacing` property now splits the specified letter spacing evenly on both sides of each character. This is unlike the current behavior where spacing is added primarily to one side. This approach can improve text spacing, especially in mixed-directional text [Firefox bug 1891446](https://bugzil.la/1891446).
Expand All @@ -1060,7 +1100,7 @@ The CSS `letter-spacing` property now splits the specified letter spacing evenly
<tbody>
<tr>
<th>Nightly</th>
<td>127</td>
<td>128</td>
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<td>Yes</td>
</tr>
<tr>
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