docs: update root option docs#3204
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liuxingbaoyu
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May 23, 2026
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Do you think it's necessary for us to explain that source code maps outside the root directory will be ignored?
JLHwung
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May 26, 2026
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Pull request overview
Updates the Babel root option documentation to reflect its additional role in resolving relative sourceMappingURL references (as part of the config loading / project root concept).
Changes:
- Updates the
rootoption description from “two” to “three” primary use cases. - Adds documentation describing how
rootbounds resolution of relativesourceMappingURLvalues (and that maps outsiderootare ignored).
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| - The base directory when checking for the default [`"configFile"`](#configfile) value | ||
| - The default value for [`"babelrcRoots"`](#babelrcroots). | ||
| - The default value for [`"babelrcRoots"`](#babelrcroots) | ||
| - The base directory which a relative `sourceMappingURL` in the source file can be resolved up to. Source Maps not within `root` will be ignored. |
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Docs PR for babel/babel#17999.