index.ts

import * as React from 'react'
import * as ReactDOM from 'react-dom'

ReactDOM.render(null, null)

npm.log

index.ts(4,17): error TS2345: Argument of type 'null' is not assignable to parameter of type 'ReactElement<{}>'.

package.json

{
  "name": "tsblow",
  "main": "index.js",
  "scripts": {
    "tsc": "tsc"
  },
  "devDependencies": {
    "@types/react": "^0.14.34",
    "@types/react-dom": "^0.14.16",
    "typescript": "^2.0.2"
  },
  "dependencies": {
    "react": "^15.3.1",
    "react-dom": "^15.3.1"
  }
}

tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es5",
        "strictNullChecks": true,
        "noImplicitAny": true
    }
}