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Reference Types

Miscellaneous: Reference Type

Reference Type - Advanced Topic​

Please Read more about reference type here: https://javascript.info/reference-type

View Code Example:
Code Example: Reference Type error and solution

// Problem: Losing this // reference type error
let user = {
  name: 'John',
  hi() {
    console.log(this.name);
  },
  bye() {
    console.log('Bye');
  },
};

user.hi(); // works

// now let's call user.hi or user.bye depending on the name
(user.name == 'John' ? user.hi : user.bye)(); // Error!

////////////////////////////////////////

// Solution: Losing this
let user = {
  name: 'John',
  hi() {
    console.log('Hi, ' + this.name);
  },
  bye() {
    console.log('Bye');
  },
};

let f = user.hi.bind(user)(
  // now let's call user.hi or user.bye depending on the name
  user.name == 'John' ? user.hi : f.bye
); // returns Hi, John