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DorianGrey avatar DorianGrey commented on August 18, 2024

The statement you mentioned isn't an official one, and it's ... wrong.
Just take a look at the webpack configurations ...
E.g.:

create-react-app-typescript/config/webpack.config.dev.js

Lines 160 to 169 in eb34688

test: /\.(js|jsx|mjs)$/,
include: paths.appSrc,
loader: require.resolve('babel-loader'),
options: {
// @remove-on-eject-begin
babelrc: false,
presets: [require.resolve('babel-preset-react-app')],
// @remove-on-eject-end
compact: true,
},

It's still allowed to import and use js files, which might be quite common during migrations. At least there were quite a lot of requests for this. Since require.resolve is used to avoid clunky webpack message when a loader could not be found, it is enforced that these packages are present - they are resolved before the build.
babel-code-frame is used by the type checker to generate a code frame for each reported error.
babel-jest is referenced by jest by default, and thus cannot be omitted.

from create-react-app-typescript.

danielkcz avatar danielkcz commented on August 18, 2024

Isn't TypeScript capable of transforming JavaScript as well? It's just a file without types, so it shouldn't be a problem, right?

That said, if we would remove Babel completely, we would close the path for babel-plugin-macros which is extremely handy and used by more and more projects now and included in CRA2. However, in the and it means that we need to use babel-loader for TypeScript files as well.

from create-react-app-typescript.

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