Webpack 5: Updating the file path for TypeScript declaration files

My project structure includes a crucial src/ts folder:

- dist/
    - js/
    - css/
    - index.html
    - about.html
- src/
    - assets/
        - fonts/
        - images/
    - sass/
    - ts/
        - services/
            - service1.ts
            - service2.ts
        - utils/
            - util1.ts
            - util2.ts
        - index.ts
        - about.ts

The issue at hand:

I am working with Webpack to generate declaration files. I need these files to be output in the directory dist/types. However, my current webpack configuration places the declarations in dist/src/ts/.

My configuration:

tsconfig.json

{
    "compilerOptions": {
        "outDir": "./dist/",
        "sourceMap": true,
        "strict": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "noImplicitAny": true,
        "removeComments": true,
        "declaration": true, // Generates declaration files .d.ts
        "strictNullChecks": true,
        "module": "es6",
        "target": "es5",
        "jsx": "react",
        "allowJs": true,
        "moduleResolution": "node",
    }
}

Utilizing ts-loader in webpack config file.

    module: {
        rules: [
            {
                test: /\.tsx?$/,
                use: 'ts-loader',
                exclude: /node_modules/,
            },
        ],
    },

Answer №1

If you're looking to improve your TypeScript configuration, consider including the DeclarationDir option in your tsconfig file.

// tsconfig.json
{
...
  "declaration": true,
  "declarationDir": "./dist/types"
...
}

Explore more about DeclarationDir here.

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