CRA with typescript stopped type checking

[AJLoveChina]

This is a cloned question, original link @jakeboone02

There is no anwser in original question, but I happend to the same issue. I want to create a comment but not allowed.

After struggling for hours, I finally find the root cause.
I hope my answer can help others who have the same issue.

What's the issue?
I have a TypeScript/React application that I bootstrapped with create-react-app. It used to do type checking when I ran yarn start, but recently it stopped

What's the root cause?
In my project, I use @svgr/cli to convert svg to react components, it will also automatically create a index.js which export all svg comps, but there could be some js syntax errors because of some reasons. Then this file makes typescript type checking broken. The console will no longer print type errors

What's the solution?

• delete the js file which has syntax errors
• or fix syntax errors in your js files

PPS: in my project, the syntax error is like this

export {HighlightOutlineSVG} from "Highlight+Outline+svg"

[AJLoveChina]

But I don't know why tslint is broken, does someone know?