Escape bootstrapScriptContent for javascript embedding into HTML #24385
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Comparing: 726ba80...b8e4253 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
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gnoff
commented
Apr 15, 2022
sebmarkbage
approved these changes
Apr 15, 2022
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| const scriptRegex = /(<\/|<)(s)(cript)/gi; | ||
| const scriptReplacer = (match, prefix, s, suffix) => | ||
| `${prefix}${substitutions[s]}${suffix}`; |
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Let's make this an inline condition instead of going through a whole hidden class check and fake-map look up.
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I meant s === 's' ? '\\u0073' : '\\u0053'
packages/react-dom/src/__tests__/escapeScriptForBrowser-test.js
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packages/react-dom/src/__tests__/escapeScriptForBrowser-test.js
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The previous escape was for Text into HTML and breaks script contents. The new escaping ensures that the script contents cannot prematurely close the host script tag by escaping script open and close string sequences using a unicode escape substitution.
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the escaping of this function does is tailored to the specific use case of how bootstrapScriptContent is currently set up and having it be a module suggests it is meant for a more general than it has been considered for. Additionally the tests were redone to focus on practical implications for what is and is not escaped
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sebmarkbage
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Apr 16, 2022
| const scriptReplacer = (match, prefix, s, suffix) => | ||
| `${prefix}${s === 's' ? '\\u0073' : '\\u0053'}${suffix}`; | ||
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| function escapeBootstrapScriptContent(scriptText) { |
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Maybe a leave a comment with the rationale and clarifying that this only works if the whole content is encoded and if it's an actual JS script tag, and doesn't work for attributes or CSS.
This was referenced Mar 4, 2023
This was referenced Nov 8, 2024
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The previous escape was for Text into HTML and breaks script contents. The new escaping ensures that the script contents cannot prematurely close the host script tag by escaping script open and close string sequences using a unicode escape substitution.
closes: #23063