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added 13 commits
October 1, 2026 06:42
…orced-polyfill Chromium run - tests.yml: Node 24.5, actions v4, install Playwright browsers, drop the Saucelabs job - scoped-custom-element-registry: test:forced runs the tests in Chromium with the polyfill forced (FORCE_POLYFILL), and npm test depends on it - test/wtr.firefox.config.js: run the tests locally in a Firefox-engine browser without native support
A rewrite. Start with the "How it works" overview at the top of src/scoped-custom-element-registry.ts, then read the file rather than the line diff.
behavior.test.js and parsing.test.html(.js) are new; tests of polyfill-only behavior, and of spec behavior Chromium gets wrong, use itWithPolyfill so the suite also runs against native implementations.
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October 7, 2026 07:12
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Adds WPT tests and fixes corner case related cross realm issues.
npm testalso runs the web platform tests for custom element registries,vendored in
test/wpt/, in Chromium, Firefox and WebKit with the polyfillforced (
npm run test:wpt).See README.md for info