Problem with Visual Studio Code using "react-jsx" as jsx value with create-react-app

Question

I'm struggling with following "error" in VSCode :

Argument for '--jsx' option must be: 'preserve', 'react-native', 'react' 

Hence, react-scripts (create-react-app) automatically sets the jsx key to react-jsx value, when react value seems to work.

Actually, the code works perfectly and displays the page I want, but the IDE is underlining kinda everything as errors, saying :

Cannot use JSX unless the '--jsx' flag is provided. 

Here is my tsconfig.json :

{   "compilerOptions": {     "target": "es5",     "lib": [       "dom",       "dom.iterable",       "esnext"     ],     "allowJs": true,     "skipLibCheck": true,     "esModuleInterop": true,     "allowSyntheticDefaultImports": true,     "strict": true,     "forceConsistentCasingInFileNames": true,     "noFallthroughCasesInSwitch": true,     "module": "esnext",     "moduleResolution": "node",     "resolveJsonModule": true,     "isolatedModules": true,     "noEmit": true,     "jsx": "react-jsx"   },   "include": [     "src"   ] }  

, and my package.json (default one provided by create-react-app + packages updated) :

{   "name": "front-office",   "version": "0.1.0",   "private": true,   "dependencies": {     "@testing-library/jest-dom": "^5.11.6",     "@testing-library/react": "^11.2.2",     "@testing-library/user-event": "^12.2.2",     "@types/jest": "^26.0.15",     "@types/node": "^14.14.9",     "@types/react": "^17.0.0",     "@types/react-dom": "^17.0.0",     "bootstrap": "^4.5.3",     "react": "^17.0.1",     "react-bootstrap": "^1.4.0",     "react-dom": "^17.0.1",     "react-scripts": "4.0.1",     "typescript": "^4.1.2",     "web-vitals": "^1.0.1"   },   "scripts": {     "start": "react-scripts start",     "build": "react-scripts build",     "test": "react-scripts test",     "eject": "react-scripts eject"   },   "eslintConfig": {     "extends": [       "react-app",       "react-app/jest"     ]   },   "browserslist": {     "production": [       ">0.2%",       "not dead",       "not op_mini all"     ],     "development": [       "last 1 chrome version",       "last 1 firefox version",       "last 1 safari version"     ]   } }  

I'm using the latest version of Typescript, and I updated all my packages with ncu, closed/opened VSCode (works sometimes with tsconfig !) and nothing seems to resolve that.

I'm pretty sure it's a VSCode problem, but I'm running out of ideas about how to resolve that.

Any of you guys got ideas ?

Edit:

If you followed the above steps and VSCode still shows the "-jsx" error, make sure you have disabled the 'TypeScript God' extension (and any other TS extension until the issue no longer appears).

Answer 1

This is because VSCode's Typescript version is not using the newest babel features that create-react-app uses by default.

You can change VS Code to use the workspace's version of Typescript instead, which will fix this issue.

Open a TypeScript or JavaScript file and click on the TypeScript version number in the Status Bar. A message box will appear asking you which version of TypeScript VS Code should use

Select "Use Workspace Version" to use the newer Create React App typescript version.

Answer 2

In PhpStorm (and the same is probably true for WebStorm) I got it to not complain about "react-jsx" as the value by ticking "Always download the most recent version of schemas" in Remote JSON Schemas.