1. In the company's project, multiple pages reported errors. After development, it was found that it had no effect on the page, and it has not been processed. Later, when it was processed again, the problem was not found. I found the post on CSDN and used the following method to solve it file error
At this time, I found that the component I packaged still indicated that "xxx" could not be used as a JSX component. Later, I checked and found that the reason was that ts did not match the version of @types/react, and the prompt reported an error due to the version problem. You can check the @ in your project. types/react version and ts version to replace,
Query the local ts version
npm view typescript versionQuery the local @types/react version
Check in the package.json file
Reason for error 
https://www.npmjs.com/package/@types/react?activeTab=versions