Impact Score: 5/10
Tailwind CSS v4.1.13 — Release Notes & Engineering Impact
Source available — automated, not human-reviewed
Component: tailwind · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
Tailwind CSS v4.1.13. Source highlight: Drop warning from browser build (#18731)
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
🔧 Bug Fixes & Patches (6)
- Don't transition `visibility` when using `transition` (#18795)
- Discard matched variants with unknown named values (#18799)
- Discard matched variants with non-string values (#18799)
- Show suggestions for known `matchVariant` values (#18798)
- Replace deprecated `clip` with `clip-path` in `sr-only` (#18769)
- Hide internal fields from completions in `matchUtilities` (#18820)
📄 View Raw Release Notes (Original Developer Log)
### Changed
- Drop warning from browser build ([#18731](https://github.com/tailwindlabs/tailwindcss/issues/18731))
- Drop exact duplicate declarations when emitting CSS ([#18809](https://github.com/tailwindlabs/tailwindcss/issues/18809))
### Fixed
- Don't transition `visibility` when using `transition` ([#18795](https://github.com/tailwindlabs/tailwindcss/pull/18795))
- Discard matched variants with unknown named values ([#18799](https://github.com/tailwindlabs/tailwindcss/pull/18799))
- Discard matched variants with non-string values ([#18799](https://github.com/tailwindlabs/tailwindcss/pull/18799))
- Show suggestions for known `matchVariant` values ([#18798](https://github.com/tailwindlabs/tailwindcss/pull/18798))
- Replace deprecated `clip` with `clip-path` in `sr-only` ([#18769](https://github.com/tailwindlabs/tailwindcss/pull/18769))
- Hide internal fields from completions in `matchUtilities` ([#18820](https://github.com/tailwindlabs/tailwindcss/pull/18820))
- Ignore `.vercel` folders by default (can be overridden by `@source …` rules) ([#18855](https://github.com/tailwindlabs/tailwindcss/pull/18855))
- Consider variants starting with `@-` to be invalid (e.g. `@-2xl:flex`) ([#18869](https://github.com/tailwindlabs/tailwindcss/pull/18869))
- Do not allow custom variants to start or end with a `-` or `_` ([#18867](https://github.com/tailwindlabs/tailwindcss/pull/18867), [#18872](https://github.com/tailwindlabs/tailwindcss/pull/18872))
- Upgrade: Migrate `aria` theme keys to `@custom-variant` ([#18815](https://github.com/tailwindlabs/tailwindcss/pull/18815))
- Upgrade: Migrate `data` theme keys to `@custom-variant` ([#18816](https://github.com/tailwindlabs/tailwindcss/pull/18816))
- Upgrade: Migrate `supports` theme keys to `@custom-variant` ([#18817](https://github.com/tailwindlabs/tailwindcss/pull/18817))