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The old one is not supported on newer OpenJDK.

@sebmarkbage sebmarkbage requested a review from eps1lon December 5, 2025 20:59
@meta-cla meta-cla bot added the CLA Signed label Dec 5, 2025
@github-actions github-actions bot added the React Core Team Opened by a member of the React Core Team label Dec 5, 2025
rewrite_polyfills: false,
inject_libraries: false,
allow_dynamic_import: true,
dynamic_import_alias: 'import',
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This option is now required for dynamic import support. We just alias it back to import.

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Oh no. The new one is not compatible with old version and vice versa.

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Nice! I think this means we can remove our custom Java install step too: https://github.com/facebook/react/blob/main/.github/workflows/runtime_build_and_test.yml#L332-L335

Only reason we had it was to support that old version of Closure Compiler.

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poteto commented Dec 5, 2025

I think you might need to add this to runtime_build_and_test.yml, right at the top:

env:
    JAVA_HOME: ${{ env.JAVA_HOME_21_X64 }}

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react-sizebot commented Dec 5, 2025

Comparing: 2cb08e6...96ba6c4

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 = 6.84 kB 6.84 kB +0.64% 1.88 kB 1.89 kB
oss-stable/react-dom/cjs/react-dom-client.production.js +0.24% 608.36 kB 609.81 kB = 107.68 kB 107.12 kB
oss-experimental/react-dom/cjs/react-dom.production.js = 6.84 kB 6.84 kB +0.64% 1.88 kB 1.90 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js +0.21% 667.47 kB 668.88 kB = 117.57 kB 117.04 kB
facebook-www/ReactDOM-prod.classic.js +0.18% 693.67 kB 694.91 kB = 122.06 kB 121.39 kB
facebook-www/ReactDOM-prod.modern.js +0.17% 684.10 kB 685.28 kB = 120.45 kB 119.80 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
oss-experimental/react-server/cjs/react-server.production.js +0.55% 148.76 kB 149.58 kB = 26.28 kB 26.14 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.46% 259.82 kB 261.02 kB +0.11% 46.54 kB 46.60 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.node.production.js +0.45% 265.32 kB 266.50 kB +0.10% 48.64 kB 48.69 kB
oss-stable-semver/react-server/cjs/react-server.production.js +0.40% 145.28 kB 145.86 kB = 25.49 kB 25.34 kB
oss-stable/react-server/cjs/react-server.production.js +0.40% 145.28 kB 145.86 kB = 25.49 kB 25.34 kB
facebook-www/ReactDOMServer-prod.modern.js +0.39% 256.79 kB 257.79 kB +0.03% 45.95 kB 45.96 kB
facebook-www/ReactDOMServer-prod.classic.js +0.39% 259.12 kB 260.13 kB +0.04% 46.30 kB 46.32 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.35% 250.03 kB 250.90 kB = 45.12 kB 45.10 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.browser.production.js +0.35% 250.06 kB 250.93 kB = 45.14 kB 45.13 kB
oss-experimental/react-dom/cjs/react-dom-server.bun.production.js +0.34% 289.51 kB 290.50 kB = 50.85 kB 50.82 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.node.production.js +0.34% 254.95 kB 255.81 kB = 46.99 kB 46.96 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.node.production.js +0.34% 254.98 kB 255.84 kB = 47.01 kB 46.99 kB
oss-experimental/react-dom/cjs/react-dom-server.node.production.js +0.33% 302.78 kB 303.78 kB = 53.25 kB 53.19 kB
oss-experimental/react-dom/cjs/react-dom-server.browser.production.js +0.32% 288.76 kB 289.67 kB = 51.06 kB 51.00 kB
oss-experimental/react-dom/cjs/react-dom-server.edge.production.js +0.31% 295.06 kB 295.96 kB = 53.40 kB 53.34 kB
oss-experimental/react-markup/cjs/react-markup.production.js +0.29% 246.87 kB 247.59 kB = 45.79 kB 45.76 kB
oss-experimental/react-markup/cjs/react-markup.react-server.production.js +0.27% 356.38 kB 357.35 kB = 66.30 kB 66.10 kB
oss-stable-semver/react-dom/cjs/react-dom-client.production.js +0.24% 608.24 kB 609.69 kB = 107.66 kB 107.10 kB
oss-stable/react-dom/cjs/react-dom-client.production.js +0.24% 608.36 kB 609.81 kB = 107.68 kB 107.12 kB
facebook-www/ReactDOMServerStreaming-prod.modern.js +0.22% 266.61 kB 267.21 kB = 48.76 kB 48.71 kB
oss-stable-semver/react-server/cjs/react-server-flight.production.js +0.22% 66.18 kB 66.32 kB = 13.08 kB 13.06 kB
oss-stable/react-server/cjs/react-server-flight.production.js +0.22% 66.18 kB 66.32 kB = 13.08 kB 13.06 kB
oss-experimental/react-server/cjs/react-server-flight.production.js +0.21% 68.13 kB 68.28 kB = 13.50 kB 13.46 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js +0.21% 667.47 kB 668.88 kB = 117.57 kB 117.04 kB
oss-experimental/react-dom/cjs/react-dom-unstable_testing.production.js +0.21% 681.88 kB 683.30 kB = 121.12 kB 120.60 kB
oss-experimental/react-reconciler/cjs/react-reconciler-reflection.production.js = 11.36 kB 11.33 kB = 2.65 kB 2.64 kB
oss-stable-semver/react-reconciler/cjs/react-reconciler-reflection.production.js = 11.36 kB 11.33 kB = 2.65 kB 2.64 kB
oss-stable/react-reconciler/cjs/react-reconciler-reflection.production.js = 11.36 kB 11.33 kB = 2.65 kB 2.64 kB
oss-experimental/scheduler/cjs/scheduler.native.development.js = 12.14 kB 11.95 kB = 2.51 kB 2.50 kB
oss-stable-semver/scheduler/cjs/scheduler.native.development.js = 12.33 kB 12.14 kB = 2.55 kB 2.54 kB
oss-stable/scheduler/cjs/scheduler.native.development.js = 12.33 kB 12.14 kB = 2.55 kB 2.54 kB
oss-experimental/scheduler/cjs/scheduler.development.js = 11.95 kB 11.76 kB = 2.64 kB 2.63 kB
oss-stable-semver/scheduler/cjs/scheduler.development.js = 12.14 kB 11.95 kB = 2.68 kB 2.68 kB
oss-stable/scheduler/cjs/scheduler.development.js = 12.14 kB 11.95 kB = 2.68 kB 2.68 kB
oss-experimental/scheduler/cjs/scheduler.native.production.js = 10.79 kB 10.62 kB = 2.43 kB 2.42 kB
oss-experimental/scheduler/cjs/scheduler.production.js = 10.05 kB 9.88 kB = 2.46 kB 2.45 kB
oss-stable-semver/scheduler/cjs/scheduler.native.production.js = 10.87 kB 10.67 kB = 2.45 kB 2.44 kB
oss-stable/scheduler/cjs/scheduler.native.production.js = 10.87 kB 10.67 kB = 2.45 kB 2.44 kB
facebook-www/Scheduler-profiling.classic.js = 10.79 kB 10.59 kB = 2.67 kB 2.65 kB
facebook-www/Scheduler-profiling.modern.js = 10.79 kB 10.59 kB = 2.67 kB 2.65 kB
facebook-react-native/scheduler/cjs/Scheduler-profiling.js = 10.61 kB 10.41 kB = 2.61 kB 2.59 kB
facebook-www/Scheduler-prod.classic.js = 10.36 kB 10.16 kB = 2.57 kB 2.55 kB
facebook-www/Scheduler-prod.modern.js = 10.36 kB 10.16 kB = 2.57 kB 2.55 kB
oss-stable-semver/scheduler/cjs/scheduler.production.js = 10.18 kB 9.98 kB = 2.51 kB 2.49 kB
oss-stable/scheduler/cjs/scheduler.production.js = 10.18 kB 9.98 kB = 2.51 kB 2.49 kB
facebook-react-native/scheduler/cjs/Scheduler-prod.js = 10.18 kB 9.98 kB = 2.51 kB 2.49 kB

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