Update Module Resolution

Update module to preserve and moduleResolution to bundler in TypeScript configurations

Updates the TypeScript module and moduleResolution compiler options to 'preserve' and 'bundler' respectively for Angular projects. These settings are required for Angular's build system to work correctly with modern module resolution algorithms used by bundlers like Webpack, Vite, and esbuild.

Examples

The migration updates TypeScript configuration files in Angular projects to set both compiler options:

Before

// apps/my-app/tsconfig.app.json
{
  "compilerOptions": {
    "module": "es2020",
    "moduleResolution": "node",
  },
}

After

// apps/my-app/tsconfig.app.json
{
  "compilerOptions": {
    "module": "preserve",
    "moduleResolution": "bundler",
  },
}

If both values are already set correctly and inherited from an extended tsconfig file, the migration will not modify the configuration:

Before

// apps/my-app/tsconfig.json
{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "module": "preserve",
    "moduleResolution": "bundler",
  },
}

// apps/my-app/tsconfig.app.json
{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "types": [],
  },
}

After

// apps/my-app/tsconfig.json
{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "module": "preserve",
    "moduleResolution": "bundler",
  },
}

// apps/my-app/tsconfig.app.json
{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "types": [],
  },
}

The migration only processes TypeScript configuration files that are referenced by Angular project build targets, ensuring that only Angular-specific configurations are updated.