JavaScript: Map.prototype

By Xah Lee. Date: . Last updated: .

New in JS2015.

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

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

Type

Type of Map.prototype is Object .

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

console.log(
  Reflect.apply(Object.prototype.toString, Map.prototype, []) ===
    "[object Map]",
);

Parent

Parent of Map.prototype is Object.prototype .

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

Purpose

Purpose of Map.prototype object is to provide methods and properties useful for all map instances.

Map.prototype is the parent of all map instances.

console.log( Reflect.getPrototypeOf ( new Map() ) === Map.prototype );

[see the Map Object Tutorial]

Properties

Value Properties

Function Properties

get/set

loop

JavaScript Map Object

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