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perf(tabs): reduce amount of reflows when aligning the ink bar #2372

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merged 1 commit into from
Jan 3, 2017

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@crisbeto crisbeto commented Dec 23, 2016

Currently the ink bar gets aligned to the active tab every time change detection runs. These changes switch to aligning it if the selected index has changed or the header's content has changed. This can be improved further if we were to debounce the MutationObserver changes (will add in a follow-up PR).

@googlebot googlebot added the cla: yes PR author has agreed to Google's Contributor License Agreement label Dec 23, 2016
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crisbeto commented Dec 23, 2016

@andrewseguin I think I covered all the bases in regards to the ink bar always being aligned, but it would be nice to have a second pair of eyes on it.

Currently the ink bar gets aligned to the active tab every time change detection runs. These changes switch to aligning it if the selected index has changed or the header's content has changed. This can be improved further if we were to debounce the MutationObserver changes (will add in a follow-up PR).
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LGTM

@jelbourn jelbourn added pr: lgtm action: merge The PR is ready for merge by the caretaker and removed pr: needs review labels Dec 23, 2016
crisbeto added a commit to crisbeto/material2 that referenced this pull request Dec 25, 2016
* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to angular#2372.
crisbeto added a commit to crisbeto/material2 that referenced this pull request Dec 25, 2016
* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to angular#2372.
@kara kara merged commit dab742f into angular:master Jan 3, 2017
crisbeto added a commit to crisbeto/material2 that referenced this pull request Mar 28, 2017
* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to angular#2372.
crisbeto added a commit to crisbeto/material2 that referenced this pull request Apr 12, 2017
* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to angular#2372.
crisbeto added a commit to crisbeto/material2 that referenced this pull request May 2, 2017
* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to angular#2372.
andrewseguin pushed a commit that referenced this pull request May 2, 2017
)

* feat(observe-content): add debounce option and other improvements

* Adds a reusable utility for debouncing a function.
* Adds the ability to debounce the changes from the `cdkObserveContent` directive.
* Makes the `cdkObserveContent` directive pass back the `MutationRecord` to the `EventEmitter`.
* Fires the callback once per mutation event, instead of once per `MutationRecord`.

Relates to #2372.

* Remove flaky tests.

* Stub out the MutationObserver.

* refactor: use debounce logic from rxjs

* chore: fix lint error

* fix: refactor the MutationObserver token to not break AoT
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4 participants