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JS Getters and Setters

Getters and setters allow you to get and set properties via methods.

This example has a modified setter to secure upper case uppdates of language.

// Create an object:
var person = {
  firstName: "John",
  lastName : "Doe",
  language : "",
  set lang(value) {
     this.language = value.toUpperCase();
  }
};
// Set an object property using a setter:
person.lang = "en";
// Display data from the object:
document.getElementById("demo").innerHTML = person.language;