Example of Avoiding global varibales

greet.service.js

"use strict";

/*
 * This will not be hoisted as global variable
 */
function Greet() {
  message = "Hello & Welcome to Ever Blogs"; // It will throw run time error
}

/*
 * This will not become global variable as global functions
 * have their own `this` in strict mode
 */
function Greet() {
  this.message = "Hello & Welcome to Ever Blogs";
}