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* Feat: Add support for replaying :defined pseudo-class of custom elements * add isCustom flag to serialized elements Applying Justin's review suggestion * fix code lint error * add custom element event * fix: tests (#1348) * Update packages/rrweb/src/record/observer.ts * Update packages/rrweb/src/record/observer.ts --------- Co-authored-by: Nafees Nehar <nafees87n@gmail.com> Co-authored-by: Justin Halsall <Juice10@users.noreply.github.com>