Boshen 66b8c022ab feat(parser): implement unambiguous module parsing for JS/TS files (#18124) ...

## Summary

- Implements speculative/unambiguous parsing for `.js`, `.jsx`, `.ts`, and `.tsx` files
- Instead of assuming module or script upfront, parses with `ModuleKind::Unambiguous` and upgrades to module mode when ESM syntax is detected
- ESM indicators: `import`, `export`, `import.meta` (NOT top-level await alone)
- Defers top-level await errors until module type is resolved
- Vue loader upgrades unambiguous scripts to module mode
- Updates linter tests to use explicit ESM extensions (`.mjs`/`.mts`) where needed

## Test plan

- [x] All parser tests pass
- [x] All linter tests pass
- [x] All semantic tests pass
- [x] Coverage conformance tests updated

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2026-01-17 13:40:28 +00:00

..

parse.test.ts

feat(parser): implement unambiguous module parsing for JS/TS files (#18124)

2026-01-17 13:40:28 +00:00