Map.prototype.size
The size
accessor property returns the number of elements in a
Map
object.
Description
The value of size
is an integer representing how many entries the Map
object
has. A set accessor function for size
is undefined
; you can not change this
property.
Examples
Using size
var myMap = new Map();
myMap.set('a', 'alpha');
myMap.set('b', 'beta');
myMap.set('g', 'gamma');
myMap.size // 3
Specifications
Specification |
---|
ECMAScript Language Specification # sec-get-map.prototype.size |
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