Kaoru0822andClaude Opus 5.5 24398a89e4 fix(source-maps): resolve empty sourceRoot sources against the map URL (#8107) ...

webpack 5 and tsc write "sourceRoot": "" for map-relative sources. Since
5f702dd6c the shared join added "/" for any non-null root, so these
sources resolved from the URL root: rxjs's ../../../src/internal/Observable.ts
under /npm/rxjs@7.8.1/dist/cjs/internal/ became /src/internal/Observable.ts,
and xterm's webpack://xterm/./src/... became https://host/webpack://xterm/....

Treat an empty root like a null root in sourceMapReference, the single join
used by trace-web-source-location, analyze-javascript-application and the
web source-map fetcher. Chrome, Firefox and trace-mapping skip an empty root,
and tc39/ecma426#183 wrote the current steps to match them. Non-empty roots,
including "/" and repeated slashes (#6726), keep their existing behavior.

Fixes #8106

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-30 01:00:41 -07:00

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