Function init

scripts/build.ts:158–201

(targetDir: string, commenjsDir: string, esmDir: string, roots: string[])

}

function init(targetDir: string, commenjsDir: string, esmDir: string, roots: string[]) {
    removeSafeDir(targetDir);
    mkdirSync(commenjsDir, { recursive: true });
    mkdirSync(esmDir, { recursive: true });
    // Read the TypeScript config file.
    const { config } = ts.readConfigFile('tsconfig.json', (fileName) => readFileSync(fileName).toString());

    const sourceDir = join('src');

    const compile = createCompiler(config, sourceDir);

    compile(
        roots,
        esmDir,
        {
            module: ts.ModuleKind.ES2020,
            moduleResolution: ts.ModuleResolutionKind.NodeJs,
            declaration: true,
            declarationDir: './types', // this becomes ./dist/types
            declarationMap: false,
            removeComments: true,
            sourceMap: false,
            importHelpers: false,
            outDir: undefined
        },
        ['.ts']
    );

    compile(
        roots,
        commenjsDir,
        {
            module: ts.ModuleKind.CommonJS,
            moduleResolution: ts.ModuleResolutionKind.NodeJs,
            declaration: false,
            outDir: undefined, // this is a must!
            declarationMap: false,
            removeComments: true,
            sourceMap: false,
            importHelpers: false // commonjs sometimes needs some extra code to create analogs for esm constructs (example export * from 'xyz)
        },
        ['.ts']
    );
}

init('./dist', './dist/commonjs', './dist/esm', ['./src/index.ts']);