thisConfusion.js

// Object literals

let myObjectLiteral = {
  variableKey: "variableValue",
  functionKey: function (params) {
    // magic goes in here
  },
};

// module defined with object literal
var myModule = {
  myProperty: "someValue",
  //object literals can contain properties and methods.
  //here, anothere object is defined for configuration purposes
  myConfig: {
    useCaching: true,
    language: "en",
  },
  //a very basic method
  myMethod: function () {
    console.log("I can have something?");
  },
  //output a value based on current configuration
  myMethod2: () => {
    console.log(
      "Caching is" + (this.myConfig.useCaching) ? "enabled" : "disabled"
    );
  },
  //override the current configuration
  myMethod3: (newConfig) => {
    if (typeof newConfig === "object") {
      this.myConfig = newConfig;
      console.log(this.myConfig.language);
    }
  },
};

myModule.myMethod();
myModule.myMethod2();// undefined.
myModule.myMethod3({
    language: "fr",
    useCaching: false
})