tsconfig.json

{
    "compilerOptions": {
      "target": "es6",                         
      "module": "commonjs",
      "jsx": "react",
      "checkJs": false,                       
      "allowJs": true,                    
      "sourceMap": true,                     /* Generates corresponding '.map' file. */
      "removeComments": true,                /* Do not emit comments to output. */
     
      /* Strict Type-Checking Options */
      "strict": true,                          
      "noImplicitAny": false,                 
      "strictNullChecks": true,           
      "strictFunctionTypes": true,           
      "strictPropertyInitialization": true,  
      "noImplicitThis": true,                
  
      "noUnusedLocals": true,                
      "noUnusedParameters": true,            
      "noImplicitReturns": true,             
      "noFallthroughCasesInSwitch": true,    

      "esModuleInterop": true
    },
    "include": [
        "./app/**/*"
    ]
  }