eslint报错：Missing file extension "ts" for "./App"

一、问题

error Missing file extension "ts" for "./App"

二、解决

// .eslintrc.js
rules: {
  "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never"
      }
   ]
},