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Recognize missing viewport and font-relative length units #20516

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Recognize missing viewport and font-relative length units #20516

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1170cd7
Recognize missing viewport and font-relative length units
kwy404 Sep 25, 2026
8e248d1
Update changelog entry with PR number
kwy404 Sep 25, 2026
704d918
Test every newly recognized length unit
kwy404 Sep 26, 2026
be6219f
Check the full generated rule for each length unit
kwy404 Sep 26, 2026
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Sort `min-*`, `max-*`, and container query variants with decimal values numerically (e.g. `min-[40.25rem]` before `min-[40.5rem]`) ([#20512](https://github.com/tailwindlabs/tailwindcss/pull/20512))
- Ensure CSS comments ending with `\*/` are closed correctly instead of swallowing the CSS that follows (e.g. `/* C:\temp\*/`) ([#20508](https://github.com/tailwindlabs/tailwindcss/pull/20508))
- Improve style invalidation performance of `group-*` and `peer-*` variants ([#20513](https://github.com/tailwindlabs/tailwindcss/pull/20513))
- Treat viewport units like `dvmin` and `svi` and font-relative units like `cap` and `rex` as lengths in arbitrary values (e.g. `text-[10dvmin]` generates `font-size` instead of `color`) ([#20516](https://github.com/tailwindlabs/tailwindcss/pull/20516))

## [4.3.3] - 2026-07-16

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28 changes: 28 additions & 0 deletions packages/tailwindcss/src/utilities.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -26917,6 +26917,34 @@ test('text', async () => {
).toEqual('')
})

test('text with viewport and font-relative length units', async () => {
let units = [
'cap',
'ic',
'rex',
'rch',
'rcap',
'ric',
'svi',
'svb',
'svmin',
'svmax',
'lvi',
'lvb',
'lvmin',
'lvmax',
'dvi',
'dvb',
'dvmin',
'dvmax',
]
for (let unit of units) {
expect(await run([`text-[1${unit}]`])).toEqual(
`\n.text-\\[1${unit}\\] {\n font-size: 1${unit};\n}\n`,
)
}
})

test('text-shadow', async () => {
expect(
await run(
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18 changes: 18 additions & 0 deletions packages/tailwindcss/src/utils/infer-data-type.ts
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Expand Up @@ -208,7 +208,13 @@ const LENGTH_UNITS = [
'em',
'ex',
'ch',
'cap',
'ic',
'rem',
'rex',
'rch',
'rcap',
'ric',
'lh',
'rlh',
'vw',
Expand All @@ -219,10 +225,22 @@ const LENGTH_UNITS = [
'vi',
'svw',
'svh',
'svi',
'svb',
'svmin',
'svmax',
'lvw',
'lvh',
'lvi',
'lvb',
'lvmin',
'lvmax',
'dvw',
'dvh',
'dvi',
'dvb',
'dvmin',
'dvmax',
'cqw',
'cqh',
'cqi',
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