fix: replace deprecated Babel plugin-proposal-* with plugin-transform-* #17195
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Replaces 6 deprecated Babel plugins with their maintained equivalents: - @babel/plugin-proposal-class-properties → @babel/plugin-transform-class-properties - @babel/plugin-proposal-numeric-separator → @babel/plugin-transform-numeric-separator - @babel/plugin-proposal-nullish-coalescing-operator → @babel/plugin-transform-nullish-coalescing-operator - @babel/plugin-proposal-optional-chaining → @babel/plugin-transform-optional-chaining - @babel/plugin-proposal-private-methods → @babel/plugin-transform-private-methods - @babel/plugin-proposal-private-property-in-object → @babel/plugin-transform-private-property-in-object These proposals have been merged to the ECMAScript standard and the proposal plugins are no longer maintained. Resolves facebook#13651
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Summary
Replaces 6 deprecated Babel plugins with their maintained equivalents in babel-preset-react-app.
Motivation
These proposal plugins have been merged to the ECMAScript standard and are no longer maintained, causing deprecation warnings during npm install.
Changes
@babel/plugin-proposal-class-properties→@babel/plugin-transform-class-properties@babel/plugin-proposal-numeric-separator→@babel/plugin-transform-numeric-separator@babel/plugin-proposal-nullish-coalescing-operator→@babel/plugin-transform-nullish-coalescing-operator@babel/plugin-proposal-optional-chaining→@babel/plugin-transform-optional-chaining@babel/plugin-proposal-private-methods→@babel/plugin-transform-private-methods@babel/plugin-proposal-private-property-in-object→@babel/plugin-transform-private-property-in-objectAll configuration options (loose mode) remain the same.
Testing
Resolves
Closes #13651