JavaScript Passion

I found this definition here : https://medium.com/javascript-scene/10-interview-questions-every-jav… Read more Difference Between Classical Inheritance And Prototype Inheritance

I've been initializing my reusable classes like this (constructor is usually a copy-constructor… Read more Javascript Json.stringify Doesn't Handle Prototype Correctly?

var foo = { bar : 5 } Why is foo.hasOwnProperty('__proto__') equal to false? It can'… Read more Why Is Foo.hasownproperty('__proto__') Equal To False?

I just learned about prototype in Javascript (not the framework, the native feature). I perfectly g… Read more Javascript: Object Or Object.prototype?

Consider this short code: let obj1 = { name: 'obj1', } const obj2 = Object.create(obj1);… Read more How Could This Be True??? Obj2.__proto__.isprototypeof(obj2) //true

In Google Chrom's javascript, objects have a property named __proto__ that points to their prot… Read more What Is In Object.__proto__?

I've got a particularly tricky problem using AJAX, which works fine in IE7 and Firefox, but not… Read more How Can I Add Properties To An Object In Ie6?

This seems inconsistent, but probably is due to the fact that I'm new to javascript's proto… Read more Javascript Prototype Inheritance

Can anyone enlighten me, what is the difference between hasOwnProperty and propertyIsEnumerable: C… Read more Hasownproperty Vs Propertyisenumerable

function NamedRoundedBlock(){ var name = this.makeFeild('name'); name.className = &… Read more Javascript Oop: Objects Change Their Prototype (for All Other Objects Using The Same Prototype)

I'm trying to concat an array of arrays using reduce and I figured that I could use the Array.p… Read more Using Prototype Functions In Higher Order Functions In Javascript

I want to add a new method to Number type, and then use it to change its own value. I write below c… Read more Node.js Change Number Object Value Inside Prototype

Given a very simple js object constructor and its prototype... function MyTest(name) { … Read more Oop Javascript - Is "get Property" Method Necessary?

i have read articles that say: using the prototype will be fastest since functions declared are sh… Read more Javascript Benchmarks In Testing Different Emulations Of A "class"

In the following code: function User(name) { this.name = name; } var user = new User('Jaso… Read more Call/bind/apply Vs Prototype

I am using the Typed.React library which includes a method to extend one prototype definition with … Read more How To Clone A Prototype With Property Methods?

Rather than a question, I just wanted it to be a challenge but couldn't find an answer yet. For… Read more Why Doesn't Any Object Prototype Work As A Foreach Callback?

Folks! I am trying to list down what happens behind the scenes when new keyword is used to create a… Read more "value Below Was Evaluated Just Now", What Does It Mean?

The following works fine in firefox/safari/chrome, in IE, 'this' appears to be losing conte… Read more Javascript "this" Losing Context In Ie

For some reason I can't use String.prototype.trim.call as a callback for array methods, such as… Read more Can't Use String#trim As A Callback For Array#map