The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but 2.8.3 was found instead

Question

I starting getting this error on my Angular app:

The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but 2.8.3 was found instead

Answer 1

This is just because in your projects package.json file has

eg."devDependencies": {"typescript": "~2.8.3" }

and in your machine where angular cli installed has "typescript": "2.7.2" version.

You can check this by ng -v or ng v.

So, just open package.json update your typescript version and run npm install and you are done.