LGTM1
On 10/28/25 10:05 a.m., Minseong Kim wrote:
*Contact emails*
[email protected]
*Specification*
https://www.w3.org/TR/css-text-4/#propdef-letter-spacing
https://www.w3.org/TR/css-text-4/#propdef-word-spacing
*Summary*
Enables percentage values for the letter-spacing and word-spacing CSS
property, as defined in the CSS Text Module Level 4 spec. Percentage
values are calculated relative to the advance measure of the space
character (U+0020). This gives developers more robust and flexible
control over typography, particularly in responsive designs where text
spacing needs to adapt to different viewports and font sizes.
*Blink component*
Blink>Layout>Inline
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ELayout%3EInline%22>
*Web Feature ID*
letter-spacing <https://webstatus.dev/features/letter-spacing>
*Search tags*
letter-spacing
<https://chromestatus.com/features#tags:letter-spacing>, word-spacing
<https://chromestatus.com/features#tags:word-spacing>
*Risks*
*Interoperability and Compatibility*
Risks are low. This is a support for new value of CSS properties. So
sites not using properties won't be affected. Firefox and Safari has
supported this feature for years.
/Gecko/: Shipped/Shipping Firefox is failing so many letter-spacing
tests:
https://wpt.fyi/results/css/css-text/letter-spacing?label=experimental&label=master&aligned
<https://wpt.fyi/results/css/css-text/letter-spacing?label=experimental&label=master&aligned>.
But those are related the line ending or boundary handling of
letter-spacing, not the percentage values. Related discussion:
https://github.com/w3c/csswg-drafts/issues/1518
/WebKit/: Shipped/Shipping (https://github.com/WebKit/WebKit/pull/18771)
/Web developers/: No
signals (https://issues.chromium.org/issues/327740939) The issue has 3
votes.
/Other signals/:
*WebView application risks*
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
/No information provided/
*Debuggability*
/No information provided/
*Will this feature be supported on all six Blink platforms (Windows,
Mac, Linux, ChromeOS, Android, and Android WebView)?*
Yes
*Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
Yes
- "letter-spacing-percentage-001.html" file in
https://wpt.fyi/results/css/css-text/letter-spacing -
"word-spacing-percentage-001.html" file in
https://wpt.fyi/results/css/css-text/word-spacing
(aside, I see there are a few more relevant tests at
https://github.com/web-platform-tests/wpt/commit/ffae172a1c2e44bddf71ca9430bc2aa519fbff6e)
*Tracking bug*
https://issues.chromium.org/issues/327740939
*Estimated milestones*
Shipping on desktop 145
Shipping on Android 145
Shipping on WebView 145
Shipping on iOS 145
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/5074916059381760
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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