JavaScript: Object.prototype

Object.prototype is the value of the property key "prototype" of the function Object. [see Object Object]

console.log( Object.hasOwnProperty ( "prototype" ) );

Type

Type of Object.prototype is Object .

console.log( typeof Object.prototype === "object" );

Parent

Parent of Object.prototype is null.

console.log( Reflect.getPrototypeOf ( Object.prototype ) === null );

Purpose

Object.prototype is the root parent of all standard objects.

So, for any property key k of Object.prototype, you can access it by obj.k where obj is any object. If the object obj has k as its own property, the own property is used.

Properties

Function Properties

• hasOwnProperty
• isPrototypeOf
• propertyIsEnumerable
• toString
• toLocaleString
• valueOf

Data Property

• constructor

Getter/Setter Property

• __proto__