无法将 typescript 添加到反应项目

Question

I'm trying to add typescript to a existing react project but I'm getting an error when re-starting the server with npm start.

I'm following the steps from this documentation but I'm getting an error message:

The only thing I might not have right is the react.scripts versions. Here is a copy of the results thrown by npm outdated:

Also, I checked my dependencies and everything seems to be normal.

Things I have done:

• run npm update to update all react related packages
• I have deleted the node files and re install them with npm install
• I have renamed other files to.tsx including the index.js file but I get another error:

Really keen to move this project to the next level with typescript but I have been stack trying to get it to work. By the way, here are my dependencies too:

{
  "name": "world-budget-react-v",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@fortawesome/fontawesome-svg-core": "^1.2.34",
    "@fortawesome/free-brands-svg-icons": "^5.15.2",
    "@fortawesome/free-solid-svg-icons": "^5.15.2",
    "@fortawesome/react-fontawesome": "^0.1.14",
    "@types/jest": "^26.0.23",
    "@types/node": "^15.0.2",
    "@types/react": "^17.0.5",
    "@types/react-dom": "^17.0.3",
    "@types/react-redux": "^7.1.16",
    "autoprefixer": "7.1.6",
    "axios": "^0.21.1",
    "babel-core": "6.26.0",
    "babel-eslint": "7.2.3",
    "babel-jest": "20.0.3",
    "babel-loader": "7.1.2",
    "babel-preset-react-app": "^3.1.2",
    "babel-runtime": "6.26.0",
    "case-sensitive-paths-webpack-plugin": "2.1.1",
    "chalk": "1.1.3",
    "css-loader": "0.28.7",
    "dotenv": "4.0.0",
    "dotenv-expand": "4.2.0",
    "enzyme": "^3.11.0",
    "enzyme-adapter-react-16": "^1.15.6",
    "eslint": "4.10.0",
    "eslint-config-react-app": "^2.1.0",
    "eslint-loader": "1.9.0",
    "eslint-plugin-flowtype": "2.39.1",
    "eslint-plugin-import": "2.8.0",
    "eslint-plugin-jsx-a11y": "5.1.1",
    "eslint-plugin-react": "7.4.0",
    "extract-text-webpack-plugin": "3.0.2",
    "file-loader": "1.1.5",
    "firebase": "^8.2.6",
    "firebase-admin": "^9.4.2",
    "firebase-functions": "^3.13.1",
    "fs-extra": "3.0.1",
    "html-webpack-plugin": "2.29.0",
    "jest": "20.0.4",
    "object-assign": "4.1.1",
    "postcss-flexbugs-fixes": "3.2.0",
    "postcss-loader": "2.0.8",
    "promise": "8.0.1",
    "raf": "3.4.0",
    "react": "^17.0.2",
    "react-dev-utils": "^5.0.2",
    "react-dom": "^17.0.2",
    "react-gtm-module": "^2.0.11",
    "react-redux": "^7.2.2",
    "react-router": "^5.2.0",
    "react-router-dom": "^5.2.0",
    "react-scroll-restoration": "^1.0.6",
    "react-test-renderer": "^17.0.1",
    "redux": "^4.1.0",
    "redux-thunk": "^2.3.0",
    "resolve": "1.6.0",
    "style-loader": "0.19.0",
    "sw-precache-webpack-plugin": "0.11.4",
    "typescript": "^4.2.4",
    "url-loader": "0.6.2",
    "webpack": "3.8.1",
    "webpack-dev-server": "2.11.3",
    "webpack-manifest-plugin": "1.3.2",
    "whatwg-fetch": "2.0.3"
  },
  "scripts": {
    "start": "node scripts/start.js",
    "build": "node scripts/build.js",
    "test": "node scripts/test.js --env=jsdom"
  },
  "jest": {
    "collectCoverageFrom": [
      "src/**/*.{js,jsx,mjs}"
    ],
    "setupFiles": [
      "<rootDir>/config/polyfills.js"
    ],
    "testMatch": [
      "<rootDir>/src/**/__tests__/**/*.{js,jsx,mjs}",
      "<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs}"
    ],
    "testEnvironment": "node",
    "testURL": "http://localhost",
    "transform": {
      "^.+\\.(js|jsx|mjs)$": "<rootDir>/node_modules/babel-jest",
      "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
      "^(?!.*\\.(js|jsx|mjs|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
    },
    "transformIgnorePatterns": [
      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs)$"
    ],
    "moduleNameMapper": {
      "^react-native$": "react-native-web"
    },
    "moduleFileExtensions": [
      "web.js",
      "js",
      "json",
      "web.jsx",
      "jsx",
      "node",
      "mjs"
    ]
  },
  "babel": {
    "presets": [
      "react-app"
    ]
  },
  "eslintConfig": {
    "extends": "react-app"
  }
}

Any recommendations? I hope I provided as much info as possible!

Lastly, I found this answer but not sure what they mean. Anyone keen to explain maybe Could not find a required file. - Adding TypeScript to React project

Answer 1

As per the react-scripts 2.10 you can add TypeScript to an existing project.

yarn add typescript @types/node @types/react @types/react-dom @types/jest --dev

Answer 2

Create a react-native app using: npx react-native init AwesomeProject

Once its up and running, follow this link to add typescript the right way.