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Better NEXT_MAJOR support for RN flags #28583

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merged 3 commits into from
Mar 22, 2024

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rickhanlonii
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The __NEXT_MAJOR__ value in the RN flags doesn't make sense because:

a) The flags are for the next RN major, since it only impacts the renderers
b) The flags are off, so they're not currently in the next major, they need enabled
c) the flag script didn't support it

This PR adds two aliases to the RN file:

  • __TODO_NEXT_RN_MAJOR__: flags that need enabled before the next RN major.
  • __NEXT_RN_MAJOR__: flags that have been enabled since the last RN major.

These values will need to be manually kept up to date when we cut a RN version, but once RN switches to the canary build and aligns all the flags, this entire file can be deleted.

Script screen

Notably, I added a TODO value and a legend that prints at the end of the script:

Screenshot 2024-03-18 at 8 11 27 PM

@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Mar 19, 2024
export const enableBinaryFlight = __NEXT_RN_MAJOR__; // DOM-only
export const enableCustomElementPropertySupport = __NEXT_RN_MAJOR__; // DOM-only
export const enableServerComponentKeys = __NEXT_RN_MAJOR__;
export const enableServerComponentLogs = __NEXT_RN_MAJOR__;
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@yungsters @rubennorte some of these likely went out in 0.74 right?

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I know that enableCustomElementPropertySupport was enabled after the branch cut for 0.74, but I'm not sure about the other three.

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fwiw there are 10 others in case you only saw the main page snippet

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react-sizebot commented Mar 19, 2024

Comparing: fa0efa1...7813b32

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 = 176.84 kB 176.84 kB = 54.91 kB 54.91 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js = 173.27 kB 173.27 kB = 54.04 kB 54.04 kB
facebook-www/ReactDOM-prod.classic.js = 594.30 kB 594.30 kB = 104.45 kB 104.45 kB
facebook-www/ReactDOM-prod.modern.js = 577.56 kB 577.56 kB = 101.48 kB 101.48 kB
test_utils/ReactAllWarnings.js Deleted 65.49 kB 0.00 kB Deleted 16.16 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 65.49 kB 0.00 kB Deleted 16.16 kB 0.00 kB

Generated by 🚫 dangerJS against 7813b32

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So good. ❤️

@rickhanlonii rickhanlonii merged commit fabd6d3 into facebook:main Mar 22, 2024
38 checks passed
@rickhanlonii rickhanlonii deleted the rh/rn-next-major branch March 22, 2024 17:02
gnoff added a commit to gnoff/next.js that referenced this pull request Mar 25, 2024
- 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
gnoff added a commit to gnoff/next.js that referenced this pull request Mar 25, 2024
- 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
EdisonVan pushed a commit to EdisonVan/react that referenced this pull request Apr 15, 2024
The `__NEXT_MAJOR__` value in the RN flags doesn't make sense because:

a) The flags are for the next RN major, since it only impacts the
renderers
b) The flags are off, so they're not currently in the next major, they
need enabled
c) the flag script didn't support it

This PR adds two aliases to the RN file:
- `__TODO_NEXT_RN_MAJOR__`: flags that need enabled before the next RN
major.
- `__NEXT_RN_MAJOR__`: flags that have been enabled since the last RN
major.

These values will need to be manually kept up to date when we cut a RN
version, but once RN switches to the canary build and aligns all the
flags, this entire file can be deleted.

## Script screen
Notably, I added a TODO value and a legend that prints at the end of the
script:

<img width="1078" alt="Screenshot 2024-03-18 at 8 11 27 PM"
src="https://github.com/facebook/react/assets/2440089/14da9066-f77d-437f-8188-830a31a843c5">
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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