Breaking News: Grepper is joining You.com. Read the official announcement!

prototype chain in javascript

Add Answer

Relieved Rook answered on March 26, 2020 Popularity 10/10 Helpfulness 1/10

answer prototype chain in javascript

related chaining prototype methods

related prototype chain in javascript

prototype chain in javascript

Comment

var o = {
  a: 2,
  m: function() {
    return this.a + 1;
  }
};

console.log(o.m()); // 3
// When calling o.m in this case, 'this' refers to o

var p = Object.create(o);
// p is an object that inherits from o

p.a = 4; // creates a property 'a' on p
console.log(p.m()); // 5
// when p.m is called, 'this' refers to p.
// So when p inherits the function m of o, 
// 'this.a' means p.a, the property 'a' of p

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: developer.mozilla.org

Tags: javascript prototype-chain

Link to this answer
Share Copy Link

Contributed on Mar 26 2020

Relieved Rook

0 Answers Avg Quality 2/10

Closely Related Answers

chaining prototype methods

Comment

function Shape(){//from  ww  w.j a  v a  2  s .  co  m
   this.isDrawable = true;
}
Shape.prototype.getDrawable = function(){
   return this.isDrawable;
};

function Rectangle(){
   this.hasFourEdges = false;
}

//inherit from Shape
Rectangle.prototype = new Shape();

Rectangle.prototype.getFourEdges = function (){
   return this.hasFourEdges;
};

var instance = new Rectangle();
console.log(instance.getDrawable());   //true

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: www.java2s.com

Tags: chaining chainin

Link to this answer
Share Copy Link

Contributed on Aug 16 2022

Courageous Cow

0 Answers Avg Quality 2/10

prototype chain in javascript

Comment

{
    prop: "some value",
    __proto__: {
        foo: "bar",
        constructor: ƒ doSomething(),
        __proto__: {
            constructor: ƒ Object(),
            hasOwnProperty: ƒ hasOwnProperty(),
            isPrototypeOf: ƒ isPrototypeOf(),
            propertyIsEnumerable: ƒ propertyIsEnumerable(),
            toLocaleString: ƒ toLocaleString(),
            toString: ƒ toString(),
            valueOf: ƒ valueOf()
        }
    }
}

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Mar 26 2020

Relieved Rook

0 Answers Avg Quality 2/10

prototype chain in javascript

Contents

More Related Answers

prototype chain in javascript

Closely Related Answers

chaining prototype methods

prototype chain in javascript

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.