After upgrade to Ionic 3 - All declarations of 'iterator' must have identical modifiers

[00:19:48]  ionic-app-scripts 1.3.0
[00:19:48]  watch started ...
[00:19:48]  build dev started ...
[00:19:48]  clean started ...
[00:19:48]  clean finished in 1 ms
[00:19:48]  copy started ...
[00:19:48]  transpile started ...
[00:19:52]  typescript: node_modules/@types/core-js/index.d.ts, line: 504
            All declarations of 'iterator' must have identical modifiers.

     L505:        * A function valued property that is the constructor function that is used to create
[00:19:52]  typescript: node_modules/@types/node/index.d.ts, line: 50

            All declarations of 'iterator' must have identical modifiers.

      L49:  declare var console: Console;
      L51:  declare var __filename: string;

[00:19:52]  watch ready in 4.10 s
[00:19:52]  copy finished in 4.09 s
Running live reload server: http://localhost:35729

Resolved by removing node from tsconfig.js, next to core-js.

(Marking posts as “This reply solves the problem” helps other users to know that no more help is needed and they can skip the topic, or look at it to find a solution to a problem. I marked your own answer as the solution. You can also do it yourself by clicking the button after posting it.)