this-keyword-examples.js

var a = function() {
  console.log(this);
};

// unwrapped
console.log(this); // window

// free function invocation
a(); // window

var dianne = {
  greet: function() {
    console.log('i\'m awesome');
  }
}

var person = {
  name: 'kan',
  walk: function() {
    console.log(this.name + ' is walking');
    return dianne;
  },
  greet: function() {
    // assuming we do person.greet():
    // this = person
    // person.name => 'kan'
    console.log(this.name + ' is my name');
  }
}

person.walk().greet();

var Human = function(name, age) {

  this.name = name;
  this.age = age;
  this.walk = function() {
    return this.name + ' is walking';
  }

}

var me = new Human('kan', 24);
var oliver = new Human('oliver', 24);

console.log(me === oliver);

function a() {};
console.log(me.walk === oliver.walk);