Why is 'this' undefined

Asked Dec 09 '20 at 13:25

Active Dec 09 '20 at 13:25

Viewed 30 times

var person = {
  name: "John",
  message: function () {    
    console.log("Hello, " + this.name)
  }
}

var messageFunc = person.message
messageFunc();

why am i getting "Hello, undefined" when the method here is declared to a variable? why cant it read this?

asked Dec 09 '20 at 13:25

Büşra Şirin

Because your person is not a class – mplungjan Dec 09 '20 at 13:27
In JS, `this` in a method refers to the object called the method, not the object originally defined the method. You've to bind the context: `var messageFunc = person.message.bind(person);`. – Teemu Dec 09 '20 at 13:27
`this` in the context is pointing to global and it can find any variable with name so its undefined – Shushanth Pallegar Dec 09 '20 at 13:28

Why is 'this' undefined

0 Answers0