Why did VSCode misdetect .js files?

Question

Visual Studio Code

At some point, VSCode began to define .js files as .ts and accordingly apply typescript linter rules to js code.
I tried to change the keys in settings.json, but something doesn't work. Tell me where to think

Answer 1

Apparently it's the option: "javascript.implicitProjectConfig.checkJs": true , you can check it by turning it off or adding // @ts-check to the beginning of the file

Answer 2

maybe if these files are generated automatically, they want to tell you how dull and poor pure javascript is, that they lack the environment to reveal their full potential?
typescript is just "improved javascript" and you shouldn't worry about it.