[7.x backport] Add developmentSourceSelf to JSX transform#17866
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rootvector2 wants to merge 1 commit intobabel:7.xfrom
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[7.x backport] Add developmentSourceSelf to JSX transform#17866rootvector2 wants to merge 1 commit intobabel:7.xfrom
developmentSourceSelf to JSX transform#17866rootvector2 wants to merge 1 commit intobabel:7.xfrom
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Backport of babel#17845 to the 7.x branch, as requested by nicolo-ribaudo. Adds a `developmentSourceSelf` option to `@babel/preset-react` (and `sourceSelf` to the underlying JSX development plugin) that controls whether `__source` and `__self` attributes are injected in jsxDEV calls. React 19.2+ generates these from the callsite, making Babel injection unnecessary and sometimes harmful (duplicated props warnings). Default on 7.x: `true` (preserves backward compatibility). Default on 8.x: `false` (React 19.2+ is the common target). Users on React 19.2+ can opt out with: { "runtime": "automatic", "developmentSourceSelf": false }
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developmentSourceSelf option
developmentSourceSelf optiondevelopmentSourceSelf to JSX transform
nicolo-ribaudo
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Mar 12, 2026
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Thank you! Will merge this if/when we have a minor release for Babel 7.
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Summary
Backport of #17845 to the
7.xbranch, as requested by @nicolo-ribaudo.Adds a
developmentSourceSelfoption to@babel/preset-react(andsourceSelfto the underlying JSX development plugin) that controls whether__sourceand__selfattributes are injected injsxDEVcalls.React 19.2+ generates these from the callsite, making Babel injection unnecessary and sometimes harmful (duplicated props warnings).
Defaults
truefalseUsage
Users on React 19.2+ can opt out:
{ "presets": [["@babel/preset-react", { "runtime": "automatic", "developmentSourceSelf": false }]] }Changes
create-plugin.ts: AddedsourceSelfoption to development plugin; gates__source/__selfinjection behind itnormalize-options.ts: AddeddevelopmentSourceSelfvalidation/normalization with appropriate defaultspreset index.ts: PassesdevelopmentSourceSelfthrough assourceSelfto pluginsourceSelf: true/developmentSourceSelf: truewhere neededsourceSelf: false/developmentSourceSelf: falsebehaviorAll tests pass in both Babel 7 and Babel 8 modes.