Question

Which prototypes will be setted into the following objects?

 var obj1 = new Object(); 
 var obj2 = {}; 
 var obj3 = Object.create(null);

Cosmo · Accepted Answer

All objects in JavaScript are descended from Object; all objects inherit methods and properties from Object.prototype, although they may be overridden (except an Object with a null prototype, i.e. Object.create(null))
Declaring obj1 = {} and obj2 = new Object() are the same, because {} used to create new Object.
Object.create(null) doesn't inherit from anywhere and thus has no properties at all.
In other words. a javascript object inherits from Object by default, unless you explicitly create it specifying null as its prototype, as in Object.create(null)

Cosmo · Accepted Answer

Object.prototype
Object.prototype
null

Cosmo · Answer

Object.prototype
Object.prototype
Object.prototype

Cosmo · Answer

null
Object.prototype
null

Cosmo · Answer

new Object
null
Object.prototype

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