next/dist/esm/build/get-babel-loader-config.js

The React Framework

import path from 'path';
function getReactCompiler() {
    try {
        // It's in peerDependencies, so it should be available
        // eslint-disable-next-line import/no-extraneous-dependencies
        return require.resolve('babel-plugin-react-compiler');
    } catch  {
        throw Object.defineProperty(new Error('Failed to load the `babel-plugin-react-compiler`. It is required to use the React Compiler. Please install it.'), "__NEXT_ERROR_CODE", {
            value: "E78",
            enumerable: false,
            configurable: true
        });
    }
}
const getReactCompilerPlugins = (options, isDev, isServer)=>{
    if (!options || isServer) {
        return undefined;
    }
    const compilerOptions = typeof options === 'boolean' ? {} : options;
    if (options) {
        return [
            [
                getReactCompiler(),
                {
                    panicThreshold: isDev ? undefined : 'NONE',
                    ...compilerOptions
                }
            ]
        ];
    }
    return undefined;
};
const getBabelLoader = (useSWCLoader, babelConfigFile, isServer, distDir, pagesDir, cwd, srcDir, dev, isClient, reactCompilerOptions, reactCompilerExclude)=>{
    if (!useSWCLoader) {
        return {
            loader: require.resolve('./babel/loader/index'),
            options: {
                transformMode: 'default',
                configFile: babelConfigFile,
                isServer,
                distDir,
                pagesDir,
                cwd,
                srcDir: path.dirname(srcDir),
                development: dev,
                hasReactRefresh: dev && isClient,
                hasJsxRuntime: true,
                reactCompilerPlugins: getReactCompilerPlugins(reactCompilerOptions, dev, isServer),
                reactCompilerExclude
            }
        };
    }
    return undefined;
};
/**
 * Get a separate babel loader for the react compiler, only used if Babel is not
 * configured through e.g. .babelrc. If user have babel config, this should be configured in the babel loader itself.
 * Note from react compiler:
 * > For best results, compiler must run as the first plugin in your Babel pipeline so it receives input as close to the original source as possible.
 */ const getReactCompilerLoader = (options, cwd, isDev, isServer, reactCompilerExclude)=>{
    const reactCompilerPlugins = getReactCompilerPlugins(options, isDev, isServer);
    if (!reactCompilerPlugins) {
        return undefined;
    }
    const config = {
        loader: require.resolve('./babel/loader/index'),
        options: {
            transformMode: 'standalone',
            cwd,
            reactCompilerPlugins
        }
    };
    if (reactCompilerExclude) {
        config.options.reactCompilerExclude = reactCompilerExclude;
    }
    return config;
};
export { getBabelLoader, getReactCompilerLoader };

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