This high-level view separates waiting from JavaScript execution. It does not claim that all asynchronous operations use the same operating-system facility or worker pool.
One Event Loop Turn Resumes Asynchronous Work
Follow a callback, a pending operation, its completion notification, queued promise work, and the next JavaScript continuation.
The Runtime Theory Team05 stages
trace / request.md
readyJavaScript executes synchronously until the current callback returns, throws, or suspends through an async boundary.
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