DOM: Implement finally() Observable operator
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See WICG/observable#153. This CL implements the `finally()` operator. It registers a callback which runs on both producer-initiated and consumer-initiated unsubscription. Its implementation is relatively straightforward, just utilizing the relevant subscriber's teardown list. This CL used to be really complicated, as was the spec PR. This has all been simplified since the factors that made it complicated (and broken) have been landed. See: - WICG/observable#151 (comment) - WICG/observable#154 - https://crrev.com/c/5676226 Now that the simplifying factors have been landed, this CL can proceed with a simple implementation, which passes all of the tests. [email protected] Bug: 40282760 Change-Id: Ifff220ec094abd2187f35020eae85c1bca502f89 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5654720 Reviewed-by: Di Zhang <[email protected]> Commit-Queue: Dominic Farolino <[email protected]> Cr-Commit-Position: refs/heads/main@{#1423349}
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See WICG/observable#153. This CL implements the
finally()operator. It registers a callback which runs on bothproducer-initiated and consumer-initiated unsubscription. Its
implementation is relatively straightforward, just utilizing the
relevant subscriber's teardown list.
This CL used to be really complicated, as was the spec PR. This has all
been simplified since the factors that made it complicated (and broken)
have been landed. See:
finally()operator timing semantics WICG/observable#151 (comment)SubscriberWICG/observable#154Now that the simplifying factors have been landed, this CL can proceed
with a simple implementation, which passes all of the tests.
R=[email protected]
Bug: 40282760
Change-Id: Ifff220ec094abd2187f35020eae85c1bca502f89
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5654720
Reviewed-by: Di Zhang <[email protected]>
Commit-Queue: Dominic Farolino <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1423349}