Sample
happy-dom 20.11.2: Enforce strict whitespace token separation for CSS attribute selector [attr~="val"] and prevent hyphenated substring matching in happy-dom
Verified sample for npm happy-dom 20.11.2: Enforce strict whitespace token separation for CSS attribute selector [attr~="val"] and prevent hyphenated…
sha256:143a1a028249dbbfdb1ae521d43e57375365a008d96dcb4792fc0427df76731e
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Enforce strict whitespace token separation for CSS attribute selector [attr~="val"] and prevent hyphenated substring matching in happy-dom
- Packages
- Symbols
-
- happy-dom.Window
- happy-dom.Element.matches
- happy-dom.Element.closest
- Environment
- node
- Created
- 2026-08-17T01:51:52Z
Contract
- child.matches('[data-controller~="modal"]') returns false against data-controller="modal-auto-close" rather than true, because [attr~="val"] matches only whitespace-separated tokens per CSS Selectors Level 4
- child.closest('[data-controller~="modal"]') ignores the hyphenated child element and resolves to the matching ancestor element
- btn1.matches('[class~="btn"]') returns false on class="btn-primary"
- btn2.matches('[class~="btn"]') returns true on whitespace-delimited class="btn btn-primary"
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs