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Page List: Create a JS version for the editor #31670

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merged 16 commits into from
Oct 25, 2021

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georgeh
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@georgeh georgeh commented May 10, 2021

Description

Closes #35632.

This replaces the <ServerSideRender> in Page List's edit method with a client-side version. The advantage of rendering locally is that there is no lag after changing a block attribute (e.g. on the Navigation block).

Kapture.2021-10-21.at.16.22.48.mp4

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

@georgeh georgeh requested a review from ajitbohra as a code owner May 10, 2021 17:48
@georgeh georgeh marked this pull request as draft May 10, 2021 17:49
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Size Change: +3.36 kB (0%)

Total Size: 1.07 MB

Filename Size Change
build/api-fetch/index.min.js 2.21 kB +1 B (0%)
build/block-editor/index.min.js 135 kB +127 B (0%)
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build/block-library/blocks/search/style-rtl.css 397 B +23 B (+6%) 🔍
build/block-library/blocks/search/style.css 398 B +23 B (+6%) 🔍
build/block-library/index.min.js 150 kB +1.53 kB (+1%)
build/block-library/style-rtl.css 10.3 kB +12 B (0%)
build/block-library/style.css 10.3 kB +12 B (0%)
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ℹ️ View Unchanged
Filename Size
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compressed-size-action

@annezazu annezazu added [Block] Navigation Affects the Navigation Block [Block] Page List Affects the Page List Block [Type] Enhancement A suggestion for improvement. labels Aug 25, 2021
@priethor priethor linked an issue Oct 14, 2021 that may be closed by this pull request
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👋 I'm going to work on reviving this as @georgeh is currently on leave.

The ServerSideRender here is a source of frustration (#35662) so it would be good to replace it.

I asked around and this PR is blocked on https://core.trac.wordpress.org/ticket/39037 which now has a patch.

@noisysocks noisysocks self-assigned this Oct 19, 2021
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I rebased the PR. There's some work remaining which I'll track in the PR description.

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I asked around and this PR is blocked on https://core.trac.wordpress.org/ticket/39037 which now has a patch.

I looked further into this. get_pages() already supports passing multiple values to sort_column and we can workaround Core-39037 by sorting the pages on the client. Core-39037 would make this nicer and slightly more performant but it's not a blocker.

@noisysocks noisysocks marked this pull request as ready for review October 21, 2021 06:18
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Marked this as ready for review. I think it's in pretty good shape, though I'm not 100% convinced that I haven't broken some Navigation block functionality. I could use help testing cc. @tellthemachines 😀

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Thanks for taking this on! It's working well in the editor for a small amount of pages, but performance starts to lag noticeably at > 200 pages. Is there anything we can do to improve matters when fetching the pages from the API?

You can test by running wp post generate --post_type=page --max_depth=4 --count=600 in the cli 😄

I'm also seeing a recurrent Warning: Encountered two children with the same key popping up on the console at about that amount of pages (I don't see it if there are only 10-20 pages).

On the front end, submenu icons and open on click don't work - I left a comment on that below.

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You can test by running wp post generate --post_type=page --max_depth=4 --count=600 in the cli 😄

TIL about generate. All this time I've been writing for loops in bash!

It's working well in the editor for a small amount of pages, but performance starts to lag noticeably at > 200 pages. Is there anything we can do to improve matters when fetching the pages from the API?

I added 600 pages and played around. I could see two areas where things were sluggish:

  • On first load, e.g. after pressing Add all pages in the Navigation block. The editor is still responsive, e.g. you can continue typing, it just looks frozen because there is no indication that anything is happening. I added a loading state and it feels much better now.

  • When toggling block selection, e.g. after clicking on or away from the Page List block. I'm not sure why but React wants to update every component in the block tree when this happens. I wrapped the <li>s with memo() and this improves things a lot.

Give it another try. I think things are good enough now.

I'm also seeing a recurrent Warning: Encountered two children with the same key popping up on the console at about that amount of pages (I don't see it if there are only 10-20 pages).

I'm not seeing this error... any clues? 😕

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mkaz commented Oct 22, 2021

This is testing well for me. I didn't run into any bugs or error logs, I tried testing children and did not see any console log messages, tested with various levels and number of pages.

One thing I did notice which was feedback I put in around the empty list, was a slight delay (flashing) of the "No pages found" message when loading the list. If possible do you think we can do a loading indicator while it is fetching (or nothing) and then display the results when complete?

Here's a video that shows the flash, it is with around 100 pages.

page-list-delay.mp4

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@mkaz: Thanks for reviewing! Hm, did you pull the latest changes? I added a loading state in 52e95be which should fix that flash of "No pages found". Here's how it looks for me.

Kapture.2021-10-25.at.12.18.34.mp4

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mkaz commented Oct 25, 2021

@noisysocks Confirmed, I do see the loading indicator now and looks good. I'm pretty sure I had pulled the latest, but maybe I didn't build it 🤷‍♂️

I think it is in good shape 👍

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🚀

@noisysocks noisysocks merged commit fd5d963 into trunk Oct 25, 2021
@noisysocks noisysocks deleted the add/page-list-client-block branch October 25, 2021 23:41
@github-actions github-actions bot added this to the Gutenberg 11.9 milestone Oct 25, 2021
@andrewserong andrewserong changed the title Create a JS version of Page List for the editor Page List: Create a JS version for the editor Nov 5, 2021
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Switch the Page List block to client-side rendering
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