How to fix Cannot find TypeScript compiler for ts-node in TypeScript

# Using npm
npm install --save-dev typescript

# Using yarn
yarn add --dev typescript

# Using pnpm
pnpm add --save-dev typescript

{
  "devDependencies": {
    "typescript": "^5.0.0"
  }
}

ls node_modules/typescript

# Check global TypeScript installation
npm list -g typescript

# Or check if tsc is available
tsc --version

# If not installed globally:
npm install -g typescript

# Check ts-node version
npx ts-node --version

# Try a simple test
npx ts-node -e "console.log('Hello from ts-node')"

# Debug module resolution
node -e "console.log(require.resolve('typescript'))"

# Check if ts-node can find typescript
node -e "console.log(require('ts-node').register().compiler)"

# Clear npm cache and reinstall
npm cache clean --force
rm -rf node_modules package-lock.json
npm install

# For yarn
yarn cache clean
rm -rf node_modules yarn.lock
yarn install

# For pnpm
pnpm store prune
rm -rf node_modules pnpm-lock.yaml
pnpm install

npx ts-node index.ts

{
  "ts-node": {
    "compiler": "typescript",
    "compilerOptions": {
      "module": "commonjs"
    }
  },
  "compilerOptions": {
    "target": "es2020",
    "module": "commonjs"
  }
}

# Specify compiler explicitly
npx ts-node --compiler typescript index.ts

# Or with require flag
npx ts-node --compiler-options '{"module":"commonjs"}' index.ts

# Check versions
npx ts-node --version
npx tsc --version

# Update to compatible versions if needed
npm install --save-dev ts-node@latest typescript@latest

# Or specify compatible versions in package.json