Configure JSX Feature Flags as Dynamic (React Native @ Meta)

[yungsters]

Summary

We are almost ready to experiment with enabling enableRefAsProp and disableStringRefs in React Native at Meta. My plan is to enable and validate both at the same time, in order to minimize the time that we introduce these dynamic checks in the hot code path of JSX.

How did you test this change?

$ yarn test
$ yarn flow fabric

[react-sizebot]

Comparing: 95e610d...f69bd7c

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.js	=	6.66 kB	6.66 kB	+0.05%	1.82 kB	1.82 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.67 kB	6.67 kB	+0.05%	1.83 kB	1.83 kB
facebook-www/ReactDOM-prod.classic.js	=	591.11 kB	591.11 kB	=	103.94 kB	103.94 kB
facebook-www/ReactDOM-prod.modern.js	=	567.33 kB	567.33 kB	=	100.34 kB	100.34 kB
facebook-react-native/react/cjs/JSXRuntime-prod.js	+31.32%	2.98 kB	3.92 kB	+13.64%	1.27 kB	1.44 kB
facebook-react-native/react/cjs/JSXRuntime-profiling.js	+31.32%	2.98 kB	3.92 kB	+13.64%	1.27 kB	1.44 kB
facebook-react-native/react/cjs/JSXDEVRuntime-dev.js	+8.22%	48.52 kB	52.51 kB	+7.19%	13.82 kB	14.81 kB
facebook-react-native/react/cjs/JSXRuntime-dev.js	+8.01%	49.75 kB	53.74 kB	+6.97%	14.18 kB	15.17 kB
facebook-react-native/react/cjs/React-prod.js	+7.48%	21.88 kB	23.52 kB	+4.80%	5.74 kB	6.01 kB
facebook-react-native/react/cjs/React-profiling.js	+7.34%	22.32 kB	23.95 kB	+4.71%	5.81 kB	6.09 kB
facebook-react-native/react/cjs/React-dev.js	+4.00%	113.13 kB	117.66 kB	+3.37%	29.43 kB	30.42 kB
test_utils/ReactAllWarnings.js	Deleted	64.26 kB	0.00 kB	Deleted	16.02 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
facebook-react-native/react/cjs/JSXRuntime-prod.js	+31.32%	2.98 kB	3.92 kB	+13.64%	1.27 kB	1.44 kB
facebook-react-native/react/cjs/JSXRuntime-profiling.js	+31.32%	2.98 kB	3.92 kB	+13.64%	1.27 kB	1.44 kB
facebook-react-native/react/cjs/JSXDEVRuntime-dev.js	+8.22%	48.52 kB	52.51 kB	+7.19%	13.82 kB	14.81 kB
facebook-react-native/react/cjs/JSXRuntime-dev.js	+8.01%	49.75 kB	53.74 kB	+6.97%	14.18 kB	15.17 kB
facebook-react-native/react/cjs/React-prod.js	+7.48%	21.88 kB	23.52 kB	+4.80%	5.74 kB	6.01 kB
facebook-react-native/react/cjs/React-profiling.js	+7.34%	22.32 kB	23.95 kB	+4.71%	5.81 kB	6.09 kB
facebook-react-native/react/cjs/React-dev.js	+4.00%	113.13 kB	117.66 kB	+3.37%	29.43 kB	30.42 kB
react-native/implementations/ReactFabric-prod.fb.js	+0.36%	366.41 kB	367.72 kB	+0.56%	64.05 kB	64.41 kB
react-native/implementations/ReactNativeRenderer-prod.fb.js	+0.35%	373.83 kB	375.14 kB	+0.57%	65.39 kB	65.77 kB
react-native/implementations/ReactFabric-profiling.fb.js	+0.33%	393.71 kB	395.01 kB	+0.54%	68.28 kB	68.65 kB
react-native/implementations/ReactNativeRenderer-profiling.fb.js	+0.32%	401.07 kB	402.38 kB	+0.54%	69.62 kB	69.99 kB
test_utils/ReactAllWarnings.js	Deleted	64.26 kB	0.00 kB	Deleted	16.02 kB	0.00 kB

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