Is it necessary to compile the ngfactory files during Angular 2 AOT compilation?

I've noticed an interesting behavior when compiling my Angular 2 application with `ngc`. During the first run, it generates the `.ngfactory.ts` files for each component but only compiles the TypeScript to JavaScript for other files. This results in no compiled `ngfactory` JavaScript files being produced initially.

Upon running `ngc` a second time, it does compile the `ngfactory` files as well, likely because they were generated in the same folder as the sources.

This leaves me wondering: Should the ngfactories themselves be compiled or not? And how does this impact the application?

angulartypescriptangular2-aotangular-compiler-cli

Answer №1

ngfactory files have already been compiled, so there is no need to compile them again.

For organization purposes, it is recommended to designate a specific directory for the ngfactory.ts files. Include this in your tsconfig.json file:

"angularCompilerOptions": {
  "genDir": "compiled"
}

By doing this, ngc will save the generated files into a compiled folder.

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