HTMLMediaElement — WHATWG HTML Living Standard
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Hisense 75-inch U7 Mini LED ULED 4K TV
The semantics around releasing locks with pending reads were also unclear for years. If you called read() but didn't await it, then called releaseLock(), what happened? The spec was recently clarified to cancel pending reads on lock release – but implementations varied, and code that relied on the previous unspecified behavior can break.