Set.prototype.size

The size accessor property returns the number of (unique) elements in a Set object.

Description

The value of size is an integer representing how many entries the Set object has. A set accessor function for size is undefined; you cannot change this property.

Examples

Using size

var mySet = new Set();
mySet.add(1);
mySet.add(5);
mySet.add('some text')

mySet.size; // 3

Specifications

Specification
ECMAScript Language Specification (ECMAScript)
# sec-get-set.prototype.size

Browser compatibility

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See also