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[do not merge]Retain documentElement when appending/removing from Document #24524

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@gnoff gnoff commented May 9, 2022

creating a root or hydrating into a root with a Document container could error in surprising ways because the document root element was not removed when clearing the container and then a new html element was attempting to be appended to the document. Browsers do not allow more than one root element and this errored leading to a cascading failure where all content was unmounted from the tree breaking the application.

This change changes the behavior of clearContainer, appendChildToContainer, and removeChildFromContainer

clearContainer on a Document container will now remove all children of the documentElement (usually )

appendChildToContainer on a Document container will now 'adopt' the existing documentElement, transferring all stateNode properties and children over to it rather than dirctly appending the child

removeChildFromContainer on a Document container will now remove all children of the documentElement but leave the documentElement in place

Summary

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creating a root or hydrating into a root with a Document container could error in surprising ways because the document root element was not removed when clearing the container and then a new html element was attempting to be appended to the document. Browsers do not allow more than one root element and this errored leading to a cascading failure where all content was unmounted from the tree breaking the application.

This change changes the behavior of clearContainer, appendChildToContainer, and removeChildFromContainer

clearContainer on a Document container will now remove all children of the documentElement (usually <html>)

appendChildToContainer on a Document container will now 'adopt' the existing documentElement, transferring all stateNode properties and children over to it rather than dirctly appending the child

removeChildFromContainer on a Document container will now remove all children of the documentElement but leave the documentElement in place
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sizebot commented May 9, 2022

Comparing: 99eef9e...1818f29

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 +0.64% 131.58 kB 132.42 kB +0.89% 42.17 kB 42.55 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js +0.61% 136.82 kB 137.65 kB +0.87% 43.68 kB 44.06 kB
facebook-www/ReactDOM-prod.classic.js +0.46% 440.68 kB 442.71 kB +0.58% 80.33 kB 80.79 kB
facebook-www/ReactDOM-prod.modern.js +0.48% 425.89 kB 427.92 kB +0.61% 78.17 kB 78.64 kB
facebook-www/ReactDOMForked-prod.classic.js +0.46% 440.68 kB 442.71 kB +0.58% 80.33 kB 80.80 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show
Name +/- Base Current +/- gzip Base gzip Current gzip
oss-stable-semver/react-dom/cjs/react-dom.production.min.js +0.64% 131.56 kB 132.39 kB +0.89% 42.17 kB 42.55 kB
oss-stable/react-dom/cjs/react-dom.production.min.js +0.64% 131.58 kB 132.42 kB +0.89% 42.17 kB 42.55 kB
oss-stable-semver/react-dom/umd/react-dom.production.min.js +0.63% 131.68 kB 132.51 kB +0.87% 42.80 kB 43.17 kB
oss-stable/react-dom/umd/react-dom.production.min.js +0.63% 131.70 kB 132.54 kB +0.88% 42.79 kB 43.17 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js +0.61% 136.82 kB 137.65 kB +0.87% 43.68 kB 44.06 kB
oss-experimental/react-dom/umd/react-dom.production.min.js +0.61% 136.86 kB 137.70 kB +0.91% 44.31 kB 44.72 kB
oss-experimental/react-dom/cjs/react-dom-unstable_testing.production.min.js +0.60% 140.37 kB 141.21 kB +0.83% 45.25 kB 45.63 kB
oss-stable-semver/react-dom/umd/react-dom.profiling.min.js +0.60% 140.41 kB 141.25 kB +0.92% 45.08 kB 45.49 kB
oss-stable/react-dom/umd/react-dom.profiling.min.js +0.60% 140.44 kB 141.27 kB +0.92% 45.08 kB 45.49 kB
oss-stable-semver/react-dom/cjs/react-dom.profiling.min.js +0.59% 140.98 kB 141.82 kB +0.85% 44.64 kB 45.02 kB
oss-stable/react-dom/cjs/react-dom.profiling.min.js +0.59% 141.01 kB 141.85 kB +0.85% 44.64 kB 45.02 kB
oss-experimental/react-dom/umd/react-dom.profiling.min.js +0.58% 145.60 kB 146.44 kB +0.94% 46.62 kB 47.06 kB
oss-experimental/react-dom/cjs/react-dom.profiling.min.js +0.57% 146.25 kB 147.08 kB +0.87% 46.15 kB 46.55 kB
facebook-www/ReactDOMTesting-prod.modern.js +0.49% 416.84 kB 418.87 kB +0.58% 78.07 kB 78.52 kB
facebook-www/ReactDOM-prod.modern.js +0.48% 425.89 kB 427.92 kB +0.61% 78.17 kB 78.64 kB
facebook-www/ReactDOMForked-prod.modern.js +0.48% 425.89 kB 427.92 kB +0.61% 78.17 kB 78.64 kB
facebook-www/ReactDOMTesting-prod.classic.js +0.47% 432.95 kB 434.98 kB +0.57% 80.52 kB 80.98 kB
facebook-www/ReactDOM-prod.classic.js +0.46% 440.68 kB 442.71 kB +0.58% 80.33 kB 80.79 kB
facebook-www/ReactDOMForked-prod.classic.js +0.46% 440.68 kB 442.71 kB +0.58% 80.33 kB 80.80 kB
facebook-www/ReactDOM-profiling.modern.js +0.45% 456.44 kB 458.47 kB +0.57% 82.69 kB 83.16 kB
facebook-www/ReactDOMForked-profiling.modern.js +0.45% 456.44 kB 458.47 kB +0.57% 82.69 kB 83.16 kB
facebook-www/ReactDOM-profiling.classic.js +0.43% 471.29 kB 473.32 kB +0.55% 84.91 kB 85.38 kB
facebook-www/ReactDOMForked-profiling.classic.js +0.43% 471.29 kB 473.32 kB +0.55% 84.91 kB 85.38 kB
oss-stable-semver/react-dom/umd/react-dom.development.js +0.24% 1,074.16 kB 1,076.75 kB +0.21% 231.98 kB 232.47 kB
oss-stable/react-dom/umd/react-dom.development.js +0.24% 1,074.19 kB 1,076.77 kB +0.21% 232.00 kB 232.49 kB
oss-stable-semver/react-dom/cjs/react-dom.development.js +0.24% 1,023.81 kB 1,026.28 kB +0.22% 229.42 kB 229.92 kB
oss-stable/react-dom/cjs/react-dom.development.js +0.24% 1,023.84 kB 1,026.30 kB +0.22% 229.44 kB 229.95 kB
oss-experimental/react-dom/cjs/react-dom-unstable_testing.development.js +0.24% 1,035.79 kB 1,038.25 kB +0.21% 233.24 kB 233.74 kB
oss-experimental/react-dom/umd/react-dom.development.js +0.23% 1,104.71 kB 1,107.30 kB +0.21% 238.28 kB 238.78 kB
oss-experimental/react-dom/cjs/react-dom.development.js +0.23% 1,052.95 kB 1,055.41 kB +0.22% 235.68 kB 236.19 kB
facebook-www/ReactDOMTesting-dev.modern.js +0.23% 1,035.12 kB 1,037.50 kB +0.21% 232.86 kB 233.34 kB
facebook-www/ReactDOMTesting-dev.classic.js +0.22% 1,063.75 kB 1,066.12 kB +0.20% 238.52 kB 238.99 kB
facebook-www/ReactDOMForked-dev.modern.js +0.21% 1,130.26 kB 1,132.64 kB +0.19% 249.76 kB 250.24 kB
facebook-www/ReactDOM-dev.modern.js +0.21% 1,130.26 kB 1,132.64 kB +0.19% 249.77 kB 250.25 kB
facebook-www/ReactDOMForked-dev.classic.js +0.21% 1,154.24 kB 1,156.62 kB +0.20% 254.11 kB 254.61 kB
facebook-www/ReactDOM-dev.classic.js +0.21% 1,154.24 kB 1,156.62 kB +0.20% 254.11 kB 254.62 kB

Generated by 🚫 dangerJS against 1818f29

@gnoff
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gnoff commented May 10, 2022

closing in favor of #24523 which is less code and more semantically correct

@gnoff gnoff closed this May 10, 2022
@gnoff gnoff deleted the retain-document-element branch May 10, 2022 17:26
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