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Warn if calling setState outside of render but before commit #18838

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merged 2 commits into from
May 6, 2020
Merged

Warn if calling setState outside of render but before commit #18838

merged 2 commits into from
May 6, 2020

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sebmarkbage
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@sebmarkbage sebmarkbage commented May 6, 2020 •
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This indicates that there's a side-effect spawned during render, that then asynchronously tries to set state when the response comes back. E.g. kick off a request and then setState with the result. It's a common mistake when implementing Suspense.

This should be done in useEffect.

@facebook-github-bot facebook-github-bot added React Core Team Opened by a member of the React Core Team CLA Signed labels May 6, 2020
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Details of bundled changes.

Comparing: 33c3af2...2e018a9

react-dom

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
react-dom-test-utils.development.js 0.0% 0.0% 75.29 KB 75.29 KB 20.19 KB 20.19 KB UMD_DEV
react-dom-unstable-fizz.browser.development.js 0.0% +0.1% 5.36 KB 5.36 KB 1.8 KB 1.81 KB UMD_DEV
ReactDOMTesting-dev.js +0.2% +0.1% 928.65 KB 930.9 KB 207.8 KB 208.11 KB FB_WWW_DEV
react-dom.development.js +0.2% +0.2% 942.77 KB 944.97 KB 206.49 KB 206.84 KB UMD_DEV
react-dom.production.min.js 0.0% 0.0% 124.63 KB 124.63 KB 39.91 KB 39.91 KB UMD_PROD
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react-dom.profiling.min.js 0.0% -0.0% 128.51 KB 128.51 KB 41.07 KB 41.07 KB UMD_PROFILING
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react-dom-server.browser.development.js 0.0% -0.0% 152.74 KB 152.74 KB 40.52 KB 40.52 KB NODE_DEV
react-dom.production.min.js 0.0% 0.0% 124.81 KB 124.81 KB 39.01 KB 39.01 KB NODE_PROD
react-dom-server.browser.production.min.js 0.0% 0.0% 23.32 KB 23.32 KB 8.6 KB 8.6 KB NODE_PROD
react-dom.profiling.min.js 0.0% 0.0% 128.84 KB 128.85 KB 40.3 KB 40.31 KB NODE_PROFILING
ReactDOM-dev.js +0.2% +0.1% 1015.36 KB 1017.61 KB 226.43 KB 226.76 KB FB_WWW_DEV
ReactDOMServer-dev.js 0.0% 0.0% 160.35 KB 160.35 KB 40.85 KB 40.85 KB FB_WWW_DEV
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react-art

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
react-art.development.js +0.3% +0.3% 660.89 KB 663.09 KB 139.46 KB 139.81 KB UMD_DEV
react-art.production.min.js 0.0% 0.0% 110.89 KB 110.9 KB 33.59 KB 33.6 KB UMD_PROD
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File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
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react-reconciler

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
react-reconciler.development.js +0.3% +0.3% 620.42 KB 622.53 KB 131.71 KB 132.07 KB NODE_DEV
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react-native-renderer

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
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Size changes (experimental)

Generated by 🚫 dangerJS against 2e018a9

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sizebot commented May 6, 2020 •
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Details of bundled changes.

Comparing: 33c3af2...2e018a9

react-native-renderer

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
ReactFabric-dev.js +0.4% +0.3% 638.96 KB 641.2 KB 137.19 KB 137.54 KB RN_OSS_DEV
ReactNativeRenderer-dev.js +0.3% +0.2% 657.92 KB 660.16 KB 141.75 KB 142.08 KB RN_OSS_DEV
ReactNativeRenderer-profiling.js 0.0% -0.0% 283.63 KB 283.63 KB 49.21 KB 49.21 KB RN_OSS_PROFILING
ReactFabric-prod.js 0.0% -0.0% 264.07 KB 264.07 KB 45.46 KB 45.46 KB RN_OSS_PROD

react-dom

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
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react-dom-server.browser.development.js 0.0% -0.0% 154.95 KB 154.95 KB 39.49 KB 39.49 KB UMD_DEV
react-dom-unstable-fizz.node.production.min.js 0.0% 🔺+0.2% 1.16 KB 1.16 KB 659 B 660 B NODE_PROD
react-dom-server.browser.production.min.js 0.0% 0.0% 22.97 KB 22.97 KB 8.53 KB 8.54 KB UMD_PROD
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ReactDOMForked-prod.js 0.0% 0.0% 430.03 KB 430.06 KB 77.46 KB 77.46 KB FB_WWW_PROD
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ReactDOMForked-profiling.js 0.0% 0.0% 439.79 KB 439.82 KB 79.1 KB 79.1 KB FB_WWW_PROFILING
react-dom.profiling.min.js 0.0% -0.0% 123.61 KB 123.61 KB 39.63 KB 39.63 KB UMD_PROFILING
ReactDOMTesting-dev.js +0.2% +0.1% 954.44 KB 956.69 KB 213.32 KB 213.63 KB FB_WWW_DEV
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react-art

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
ReactART-dev.js +0.4% +0.2% 609.77 KB 612.02 KB 128.49 KB 128.81 KB FB_WWW_DEV
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react-test-renderer

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
ReactTestRenderer-dev.js +0.4% +0.3% 574.17 KB 576.42 KB 121.75 KB 122.09 KB FB_WWW_DEV
react-test-renderer-shallow.production.min.js 0.0% 0.0% 12.73 KB 12.73 KB 3.96 KB 3.97 KB UMD_PROD
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react-reconciler

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
react-reconciler.development.js +0.4% +0.3% 594.66 KB 596.76 KB 126.27 KB 126.64 KB NODE_DEV

ReactDOM: size: 0.0%, gzip: 0.0%

Size changes (stable)

Generated by 🚫 dangerJS against 2e018a9

@sebmarkbage
Don't attempt to render the children of a dehydrated Suspense boundary
69c0952 
The DehydratedFragment tag doesn't exist so doing so throws.

This can happen if we schedule childExpirationTime on the boundary and
bail out.
@sebmarkbage
Warn if scheduling work on a component before it is committed
2e018a9
@sebmarkbage sebmarkbage merged commit 96f3b7d into facebook:master May 6, 2020
@bbenezech bbenezech mentioned this pull request Jul 1, 2020
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@ermanzohre ermanzohre ermanzohre approved these changes

@gaearon gaearon gaearon approved these changes

@bvaughn bvaughn Awaiting requested review from bvaughn

@acdlite acdlite Awaiting requested review from acdlite

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