Visual Studio Code:[js] types can only be used in a .ts file

Question

Is it possible to use .js files in a typescript project in vs code? I have clone a react-native project from a github repository and opened it in visual studio code. When I add a tsconfig.json in order to start using typescript, I get a long list of errors. For example here is a drawer.js file (with es6 features):

Here is my tsconfig.json file (If I remove this file then every thing works fine, no error reported) :

Answer 1

I restarted VS code and the error was gone, just in case it helps

Answer 2

Has that change the "Select Language Mode" for "TypeScript React" in list. it worked for me.