This question already has an answer here:                           Javascript object members that are prototyped as arrays become shared by all class instances                                      3 answers                                     S...

The API Reference Scope page says:     A scope can inherit from a parent scope.   The Developer Guide Scope page says:     A scope (prototypically) inherits properties from its parent scope.   So, does a child scope always prototypically inherit fr...

What's the difference between  var A = function () {     this.x = function () {         //do something     }; };   and  var A = function () { }; A.prototype.x = function () {     //do something };...

This figure again shows that every object has a prototype. Constructor   function Foo also has its own __proto__ which is Function.prototype,   and which in turn also references via its __proto__ property again to   the Object.prototype. Thus, r...

Trying to bend by head around Javascript's take on OO...and, like many others, running into confusion about the constructor property. In particular, the significance of the constructor property, as I can't seem to make it have any effect. E...

Has anyone noticed this behavior before? This really threw me off... I would have expected prototyped arrays to be private to each class instance rather than shared between all class instances.  Can someone verify that this is the correct behavior...

What are the functional differences between the following two Javascript prototypes, and are there any benefits for choosing one over the other?  Option 1:  Person.prototype.sayName = function(name) {    alert(name); }   Option 2:   Person.prototyp...

From the MDN docs for the standard setPrototypeOf function  as well as the non-standard  __proto__ property:     Mutating the [[Prototype]] of an object, no matter how this is accomplished, is strongly discouraged, because it is very slow and unavo...

Google JavaScript Style Guide advises against extending the Array.prototype. However, I used Array.prototype.filter = Array.prototype.filter || function(...) {...} as a way to have it (and similar methods) in browsers where they do not exist. MDN a...

Stylistically, I prefer this structure:  var Filter = function( category, value ){   this.category = category;   this.value = value;    // product is a JSON object   Filter.prototype.checkProduct = function( product ){     // run some checks     re...