{
    "compilerOptions": {
        "target": "es5",
        "sourceMap": true,
        "outDir": "app"
    }
}
{
    "compilerOptions": {
        "target": "es2015",
        "module": "commonjs",
        "sourceMap": true,
        "outDir": "./app",
        "strict": true
    }
}
Use TS strict mode. Target ES2015.
Use TS strict mode. Target ES2015.
