Layer 2 of the extended SW-bundle-import gate caught a runtime
ReferenceError: Buffer is not defined at EBMLDecoder.constructor
(this._buffer = Buffer.alloc(0)). Reached from remuxSegments via
extractFramesFromSegment for every input segment — would crash
the SW on every SAVE_ARCHIVE click in real Chrome.
ts-ebml has a 5-year-old open issue (legokichi/ts-ebml#37,
"Can't use Buffer in browser") acknowledging the incompatibility
with no maintainer fix. The canonical Vite workaround is
vite-plugin-node-polyfills with a narrow Buffer-only config (per
the plugin author's official docs).
Changes:
- vite-plugin-node-polyfills@0.27.0 added as devDependency
- vite.config.ts adds nodePolyfills plugin with narrow config:
include: ['buffer'], globals.Buffer: true, globals.global: false,
globals.process: false, protocolImports: false (Buffer only, no
stdlib pull-in)
- bundle delta: SW chunk 373.05 kB (-0.49 kB vs C-config alone);
+27.48 kB shared polyfill chunk (index-CgqXENQe.js, used by SW
and offscreen). Net cost ~26.3 kB for full Buffer support.
Bundle verification:
- bundled EBMLDecoder.js now reads `this._buffer = me.alloc(0)`
where `me` is the imported polyfill Buffer (was `Buffer.alloc(0)`
against undefined globalThis.Buffer). Same rewrite applied to
all 3 Buffer.alloc/Buffer.concat/Buffer.from sites in ts-ebml.
- bundle does NOT depend on globalThis.Buffer (the polyfill
rewrites references as imports, not as global assignments) —
Layer 1 of the gate still strips Buffer from globalThis and
passes, confirming this.
Layer 2 gate: RED → GREEN. resolve.alias.ebml fix from commit
52c7636 preserved — still required for ebml CJS-interop;
the polyfill addresses an orthogonal runtime concern.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Delete vite.config.ts inline copy-offscreen plugin (lines 13-216):
the 174-line plugin that emitFile'd both offscreen HTML and a stringified
JS module wired to tabCapture-era chromeMediaSource + IndexedDB pipeline
(audit P0 #1 root cause; D-08 deletion target)
- Delete vite.config.ts misplaced publicDir/copyPublicDir (no public/ dir
exists; audit P2 #17) and the manualChunks=undefined shape
- Rewrite vite.config.ts to RESEARCH.md Example B form: crx() + a single
rollupOptions.input.offscreen pointing at src/offscreen/index.html
(the crxjs-managed entry Plan 03 created); 21 lines total
- Delete orphan offscreen/index.ts (audit P2 #18 dead-code, D-08)
- Delete orphan offscreen/index.html (replaced by src/offscreen/index.html
per D-07; runtime URL semantics preserved through crxjs entry binding)
- T-1-NEW-06-01 grep gate green (this.emitFile = 0)
- T-1-NEW-06-02 grep gate green (offscreen/ directory absent)
- tsc --noEmit clean; 9/9 vitest tests still green
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
