tsconfig.json

{
    "compilerOptions": {

      //which ecma script to use
      "target": "ES6",
      //the directory the bundle will be packed into
      "outDir":"./build/",
      //use common js modules
      //"module": "commonjs",
      //no unused local variables
      "noUnusedLocals": false,
      //as above for parameters
      "noUnusedParameters": true,
      "noImplicitReturns": true,
      "noFallthroughCasesInSwitch": true,
      //allows compiling of js
      "allowJs": true,
      //allows default importing of modules with no default export
      "allowSyntheticDefaultImports": true,
      //skips type checking of type declaration files at compile time
      "skipLibCheck": false,
      //allows importing common modules using es6 syntax (import vs require)
      "esModuleInterop": true,
      //blanked option for:
      // - Use implicit Any
      // - Strict bind call apply (checks function argument types)
      // - Strict function types (don't fully understand this one)
      // - Strict null checks (defines type for, and effectively ignores, nulls and undefineds)
      // - strict property initialisation (raises error when class property delcared but not initialised)
      "strict": true,
      //forces casing in i.e. import statements to be consistent with file name casing
      "forceConsistentCasingInFileNames": true,
      //specificy module resolution strategy (node or classic)
      "moduleResolution": "node",
      //prohibits any elements from having implicit any type
      "noImplicitAny": true,
      //allows importing of json modules, false by default
      "resolveJsonModule": true,
      //limits typescript to type checking and allows webpack to handle compiling/bundling **IMPORTANT?**
      "noEmit": true,
      //specifies how jsx constructs are dealt with
      "jsx": "react"
    },
    //all files for typescript to check
    "include": ["src"]
  }