Use a queue of deferred steps in the node insertion algorithm #732

nox · 2019-02-08T12:47:57Z

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annevk

This looks good. I guess the way to go here is that you also create patches for the HTML Standard, and then we all review those, the tests, and this change a couple times until we're sure it all works?

dom.bs

whatwg/dom#732 We defer preparing scripts and updating style blocks during insertion to make sure all DOM mutations are finished before executing scripts. This is what Chrome and Firefox seem to already do anyway.

dom.bs

whatwg/dom#732 We defer preparing scripts and updating style blocks during insertion to make sure all DOM mutations are finished before executing scripts. This is what Chrome and Firefox seem to already do anyway.

annevk · 2019-02-26T11:29:03Z

We should note in the eventual commit that this helps fixing whatwg/html#1127 and #575

dom.bs

It needs to be "children changed steps" as the various consumers appear to react to changes of all sorts. Tests: web-platform-tests/wpt#15871. This builds on work started in #732 and will further refine that eventually.

annevk · 2019-12-05T17:40:02Z

The other piece of relevant feedback here is whatwg/html#4611. We need these deferred steps for removal too. Hurray!

domenic · 2019-12-05T18:19:12Z

I don't believe that's true? At least, not if we want to match 2/3 browsers; for those the current spec suffices.

annevk · 2019-12-05T18:29:59Z

That would effectively mean keeping around mutation events though and I doubt the current specification accurately accounts for that.

domenic · 2019-12-05T18:31:56Z

Hmm, maybe that argument could convince Chrome or WebKit to add the extra complexity; I'm not sure. unload events are kind of a compat minefield though so it'd be a hard sell.

It needs to be "children changed steps" as consumers appear to react to changes of all sorts. Tests: web-platform-tests/wpt#15871. This builds on work started in #732 and will further refine that eventually. Meta follow-up: #802.

annevk · 2019-12-06T14:48:37Z

dom.bs


 <p><a lt="other applicable specifications">Specifications</a> may define
 <dfn export id=concept-node-children-changed-ext>children changed steps</dfn> for all or some
-<a for=/>nodes</a>. The algorithm is passed no argument and is called from <a for=/>insert</a>,
-<a for=/>remove</a>, and <a for=/>replace data</a>.
+<a for=/>nodes</a>. The algorithm is passed <var ignore>deferredStepsQueue</var> and is called from


Addressing whatwg/html#4354 (comment) by @tkent-google in a way that aligns with Chrome would also require passing "insert"/"change"/"remove" as an argument here and acting on it accordingly. (Script would ignore anything but "insert".)

Probably would have to double check whether setting textContent counts as "change" or "insert".

whatwg/dom#732 We defer preparing scripts and updating style blocks during insertion to make sure all DOM mutations are finished before executing scripts. This is what Chrome and Firefox seem to already do anyway.

Given the old Chromium change that introduced this behavior: - https://source.chromium.org/chromium/chromium/src/+/604e798ec6ee30f44d57a5c4a44ce3dab3a871ed ... the old discussion in: - whatwg/dom#732 (review) - whatwg/html#4354 (comment) ... and the much newer discussion in: - whatwg/dom#1261 - whatwg/html#10188 This CL upstreams an old test ensuring that removal of a child node from a script node that has not "already started" [1], does not trigger script execution. Only the *insertion* of child nodes (to a non-already-started script node) should trigger that script's execution. [1]: https://html.spec.whatwg.org/C#already-started R=nrosenthal@chromium.org Bug: 40150299 Change-Id: I750ccee0a2be834360c557042e975547c8ddd32c

Given the old Chromium change that introduced this behavior: - https://source.chromium.org/chromium/chromium/src/+/604e798ec6ee30f44d57a5c4a44ce3dab3a871ed ... the old discussion in: - whatwg/dom#732 (review) - whatwg/html#4354 (comment) ... and the much newer discussion in: - whatwg/dom#1261 - whatwg/html#10188 This CL upstreams an old test ensuring that removal of a child node from a script node that has not "already started" [1], does not trigger script execution. Only the *insertion* of child nodes (to a non-already-started script node) should trigger that script's execution. [1]: https://html.spec.whatwg.org/C#already-started R=nrosenthal@chromium.org Bug: 40150299 Change-Id: I750ccee0a2be834360c557042e975547c8ddd32c Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367238 Reviewed-by: Noam Rosenthal <nrosenthal@chromium.org> Commit-Queue: Dominic Farolino <dom@chromium.org> Cr-Commit-Position: refs/heads/main@{#1272330}

…er execution, a=testonly Automatic update from web-platform-tests WPT: Script child removal does not trigger execution Given the old Chromium change that introduced this behavior: - https://source.chromium.org/chromium/chromium/src/+/604e798ec6ee30f44d57a5c4a44ce3dab3a871ed ... the old discussion in: - whatwg/dom#732 (review) - whatwg/html#4354 (comment) ... and the much newer discussion in: - whatwg/dom#1261 - whatwg/html#10188 This CL upstreams an old test ensuring that removal of a child node from a script node that has not "already started" [1], does not trigger script execution. Only the *insertion* of child nodes (to a non-already-started script node) should trigger that script's execution. [1]: https://html.spec.whatwg.org/C#already-started R=nrosenthal@chromium.org Bug: 40150299 Change-Id: I750ccee0a2be834360c557042e975547c8ddd32c Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367238 Reviewed-by: Noam Rosenthal <nrosenthal@chromium.org> Commit-Queue: Dominic Farolino <dom@chromium.org> Cr-Commit-Position: refs/heads/main@{#1272330} -- wpt-commits: cc99c62762135f7e193941e32c3f738960c256be wpt-pr: 45085

Given the old Chromium change that introduced this behavior: - https://source.chromium.org/chromium/chromium/src/+/604e798ec6ee30f44d57a5c4a44ce3dab3a871ed ... the old discussion in: - whatwg/dom#732 (review) - whatwg/html#4354 (comment) ... and the much newer discussion in: - whatwg/dom#1261 - whatwg/html#10188 This CL upstreams an old test ensuring that removal of a child node from a script node that has not "already started" [1], does not trigger script execution. Only the *insertion* of child nodes (to a non-already-started script node) should trigger that script's execution. [1]: https://html.spec.whatwg.org/C#already-started R=nrosenthal@chromium.org Bug: 40150299 Change-Id: I750ccee0a2be834360c557042e975547c8ddd32c Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367238 Reviewed-by: Noam Rosenthal <nrosenthal@chromium.org> Commit-Queue: Dominic Farolino <dom@chromium.org> Cr-Commit-Position: refs/heads/main@{#1272330}

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nox force-pushed the insertion branch from da96f99 to ced2bde Compare February 8, 2019 17:41

nox mentioned this pull request Feb 10, 2019

Use the new definition of the insertion steps whatwg/html#4354

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annevk reviewed Feb 11, 2019

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nox force-pushed the insertion branch from ced2bde to 3825dfc Compare February 11, 2019 10:23

nox mentioned this pull request Feb 12, 2019

Add insertion tests for the new changes with the "deferred steps queue" web-platform-tests/wpt#15264

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annevk mentioned this pull request Feb 26, 2019

Run insertion steps after DocumentFragment insertion completes #576

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annevk reviewed Mar 15, 2019

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annevk mentioned this pull request Mar 15, 2019

HTML: mutating the style element web-platform-tests/wpt#15871

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annevk mentioned this pull request Apr 30, 2019

Need a callback for when children changed or parser finished parsing children WICG/webcomponents#809

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annevk mentioned this pull request Dec 5, 2019

Replace child text content change steps #800

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Use a queue of deferred steps in the node insertion algorithm

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annevk force-pushed the insertion branch from 3825dfc to b78f802 Compare December 6, 2019 14:00

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annevk mentioned this pull request Dec 9, 2019

Side effects due to tree insertion or removal (script, iframe) #808

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Base automatically changed from master to main January 15, 2021 07:32

domfarolino mentioned this pull request Feb 14, 2024

Atomic move operation for element reparenting & reordering #1255

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This was referenced Feb 23, 2024

Spec for iframe removal from the document doesn't match browser behavior whatwg/html#4611

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Introduce DOM post-connection steps #1261

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chromium-wpt-export-bot mentioned this pull request Mar 13, 2024

WPT: Script child removal does not trigger execution web-platform-tests/wpt#45085

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Use a queue of deferred steps in the node insertion algorithm #732

Use a queue of deferred steps in the node insertion algorithm #732

nox commented Feb 8, 2019 •

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annevk Dec 6, 2019

Use a queue of deferred steps in the node insertion algorithm #732

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Use a queue of deferred steps in the node insertion algorithm #732

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nox commented Feb 8, 2019 • edited by pr-preview bot

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