Moves js exercises files to TS - so now you can do the examples in TS

move-exercises-to-ts.sh

#!/bin/sh

npm install -D typescript @types/node @types/react @types/react-dom @types/jest

echo "{
  "compilerOptions": {
    "target": "ESNext",
    "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", "./src/typings.d.ts"]
} " > tsconfig.json


for f in src/exercise/*.js; do sed -i '' '1s/^/\/\/ @ts-nocheck\'$'\n/g' "$f";  mv -- "$f" "${f%.js}.tsx"; done