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Test for suspending with modern strict mode #28513

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merged 1 commit into from
Mar 26, 2024

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@rickhanlonii rickhanlonii commented Mar 7, 2024

Overview

Adds a test to show the cause of an infinite loop in Relay related to these effects in Relay and useModernStrictMode. The bug is related to effect behavior when committing trees that re-suspend after initial mount.

With useModernStrictEffect, when you:

  • initial mount
  • update
  • suspend (to fallbacks)
  • resolve
  • re-commit

We fire strict effects during the second mount, like it's a new tree. This creates weird cases, where if there was an update while we suspended, we'll first fire only the effects that changed dependencies, and then fire strict effects.

Creating a test to demonstrate the behavior to see if it's a bug.

@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Mar 7, 2024
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react-sizebot commented Mar 7, 2024

Comparing: 64f354c...e831878

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js = 177.10 kB 177.10 kB = 55.20 kB 55.20 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js = 177.64 kB 177.64 kB = 55.53 kB 55.53 kB
facebook-www/ReactDOM-prod.classic.js = 594.34 kB 594.34 kB = 104.96 kB 104.96 kB
facebook-www/ReactDOM-prod.modern.js = 577.60 kB 577.60 kB = 102.02 kB 102.02 kB
test_utils/ReactAllWarnings.js Deleted 66.60 kB 0.00 kB Deleted 16.28 kB 0.00 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
test_utils/ReactAllWarnings.js Deleted 66.60 kB 0.00 kB Deleted 16.28 kB 0.00 kB

Generated by 🚫 dangerJS against e831878

@rickhanlonii rickhanlonii marked this pull request as ready for review March 26, 2024 04:01
@rickhanlonii rickhanlonii merged commit 67e6fa6 into facebook:main Mar 26, 2024
38 checks passed
EdisonVan pushed a commit to EdisonVan/react that referenced this pull request Apr 15, 2024
## Overview

Adds a test to show the cause of an infinite loop in Relay related to
[these effects in
Relay](https://github.com/facebook/relay/blob/448aa67d2a11e7d45cd7b4492b9f599b498cb39e/packages/react-relay/relay-hooks/useLazyLoadQueryNode.js#L77-L104)
and `useModernStrictMode`. The bug is related to effect behavior when
committing trees that re-suspend after initial mount.

With `useModernStrictEffect`, when you:
- initial mount
- update
- suspend (to fallbacks)
- resolve
- re-commit

We fire strict effects during the second mount, like it's a new tree.
This creates weird cases, where if there was an update while we
suspended, we'll first fire only the effects that changed dependencies,
and then fire strict effects.

Creating a test to demonstrate the behavior to see if it's a bug.
eps1lon added a commit to vercel/next.js that referenced this pull request Apr 19, 2024
### React upstream changes

- facebook/react#28643
- facebook/react#28628
- facebook/react#28361
- facebook/react#28513
- facebook/react#28299
- facebook/react#28617
- facebook/react#28618
- facebook/react#28621
- facebook/react#28614
- facebook/react#28596
- facebook/react#28625
- facebook/react#28616
- facebook/react#28491
- facebook/react#28583
- facebook/react#28427
- facebook/react#28613
- facebook/react#28599
- facebook/react#28611
- facebook/react#28610
- facebook/react#28606
- facebook/react#28598
- facebook/react#28549
- facebook/react#28557
- facebook/react#28467
- facebook/react#28591
- facebook/react#28459
- facebook/react#28590
- facebook/react#28564
- facebook/react#28582
- facebook/react#28579
- facebook/react#28578
- facebook/react#28521
- facebook/react#28550
- facebook/react#28576
- facebook/react#28577
- facebook/react#28571
- facebook/react#28572
- facebook/react#28560
- facebook/react#28569
- facebook/react#28573
- facebook/react#28546
- facebook/react#28568
- facebook/react#28562
- facebook/react#28566
- facebook/react#28565
- facebook/react#28559
- facebook/react#28508
- facebook/react#20432
- facebook/react#28555
- facebook/react#24730
- facebook/react#28472
- facebook/react#27991
- facebook/react#28514
- facebook/react#28548
- facebook/react#28526
- facebook/react#28515
- facebook/react#28533
- facebook/react#28532
- facebook/react#28531
- facebook/react#28407
- facebook/react#28522
- facebook/react#28538
- facebook/react#28509
- facebook/react#28534
- facebook/react#28527
- facebook/react#28528
- facebook/react#28519
- facebook/react#28411
- facebook/react#28520
- facebook/react#28518
- facebook/react#28493
- facebook/react#28504
- facebook/react#28499
- facebook/react#28501
- facebook/react#28496
- facebook/react#28471
- facebook/react#28351
- facebook/react#28486
- facebook/react#28490
- facebook/react#28488
- facebook/react#28468
- facebook/react#28321
- facebook/react#28477
- facebook/react#28479
- facebook/react#28480
- facebook/react#28478
- facebook/react#28464
- facebook/react#28475
- facebook/react#28456
- facebook/react#28319
- facebook/react#28345
- facebook/react#28337
- facebook/react#28335
- facebook/react#28466
- facebook/react#28462
- facebook/react#28322
- facebook/react#28444
- facebook/react#28448
- facebook/react#28449
- facebook/react#28446
- facebook/react#28447
- facebook/react#24580
- facebook/react#28514
- facebook/react#28548
- facebook/react#28526
- facebook/react#28515
- facebook/react#28533
- facebook/react#28532
- facebook/react#28531
- facebook/react#28407
- facebook/react#28522
- facebook/react#28538
- facebook/react#28509
- facebook/react#28534
- facebook/react#28527
- facebook/react#28528
- facebook/react#28519
- facebook/react#28411
- facebook/react#28520
- facebook/react#28518
- facebook/react#28493
- facebook/react#28504
- facebook/react#28499
- facebook/react#28501
- facebook/react#28496
- facebook/react#28471
- facebook/react#28351
- facebook/react#28486
- facebook/react#28490
- facebook/react#28488
- facebook/react#28468
- facebook/react#28321
- facebook/react#28477
- facebook/react#28479
- facebook/react#28480
- facebook/react#28478
- facebook/react#28464
- facebook/react#28475
- facebook/react#28456
- facebook/react#28319
- facebook/react#28345
- facebook/react#28337
- facebook/react#28335
- facebook/react#28466
- facebook/react#28462
- facebook/react#28322
- facebook/react#28444
- facebook/react#28448
- facebook/react#28449
- facebook/react#28446
- facebook/react#28447
- facebook/react#24580
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