While building an Angular 6 app i get a compile error in @angular/core/src/render3/interfaces on line 35. The line is:
[ACTIVE_INDEX]: number | null;
and the error is:
error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
I an using @angular/core@6.1.6. Am I doing something wrong or is this an Angular bug?
Verify that Visual Studio is targeting the correct version of Typescript (as seen in your package.json), then try deleting your node_modules folder, and rerunning npm install.
I believe that this is caused by running Angular 6 with an earlier, incompatible version of typescript (<2.7), because it looks like the ability used by the container.d.ts file (referenced in your error) to use Constant-Named Properties was added in Typescript 2.7. Of course, if it were that simple then ng serve would tell you about the Typescript incompatibility, so I assume that I'm either wrong, or that your environment is playing tricks on you.