feat(replay): Skip addHoverClass when stylesheet is >= 1MB#130
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feat(replay): Skip addHoverClass when stylesheet is >= 1MB#130
addHoverClass when stylesheet is >= 1MB#130Conversation
Large stylesheets will cause `addHoverClass` to block the main UI thread when viewing a replay. Turn this off when stylesheet is >= 1MB.
JoshFerge
approved these changes
Nov 8, 2023
billyvg
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Apr 26, 2024
Large stylesheets will cause `addHoverClass` to block the main UI thread when viewing a replay. Turn this off when stylesheet is >= 1MB.
chargome
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Apr 1, 2026
Remove the `fast-mhtml` dependency which was only used in one test utility function (`packages/rrweb/test/utils.ts`) for parsing MHTML snapshots in replayer E2E tests. Replace with a minimal inline parser (~30 lines) that handles multipart MIME boundary splitting and quoted-printable content decoding. All 47 replayer tests pass. `fast-mhtml` pulled in `cheerio`, `express`, `undici`, `qs`, `bluebird`, and `cookie` — a massive transitive tree for a simple test helper. This removes ~584 lines from `yarn.lock`. ### Dependabot alerts resolved **Fully resolved** (vulnerable package completely removed from lockfile): | Alert | Severity | Package | Summary | |-------|----------|---------|---------| | #166 | MEDIUM | `qs` | arrayLimit bypass allows DoS via memory exhaustion | | #183 | LOW | `qs` | arrayLimit bypass in comma parsing allows DoS | **Partially resolved** (some entries removed, but package still exists via other dependency chains): | Alert | Severity | Package | Remaining source | |-------|----------|---------|-----------------| | #225, #224, #223, #222, #221, #170, #130, #112 | HIGH/MEDIUM/LOW | `undici` | Still pulled in by `puppeteer` (Phase 3) | | #100 | LOW | `cookie` | Still pulled in by `@sveltejs/kit` (Phase 5) | closes https://linear.app/getsentry/issue/SDK-1097/replace-fast-mhtml-9-alerts --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-authored-by: chargome <chargome@users.noreply.github.com>
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Large stylesheets will cause
addHoverClassto block the main UI thread when viewing a replay. Turn this off when stylesheet is >= 1MB.