遇到未定义的提供者！ 通常，这意味着您有说谎感。 这可能是由于使用“桶” index.ts文件引起的

Question

this is the error which i get in production build

by using Layout Module.ts file as child where all the inner pages are included and ,app module.ts as parent including only the app component.ts file ,whenever I use (ng build --prod)

it show : /error message as/

circular dependencies (might be caused by using 'barrel' index.ts files.

Answer 1

I know it's hard to post the whole project because this issue more or less relates to the circular dependencies injection. This usually happens like, for example, you have 3 files a.ts , b.ts , c.ts and a import b, b import c and c import a . Or even more.

So my suggestion to debug this case is to check if your ts files to find out the circular loop.