Set.prototype.size

The size accessor property of Set instances returns the number of (unique) elements in this set.

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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

js
const mySet = new Set();
mySet.add(1);
mySet.add(5);
mySet.add("some text");

console.log(mySet.size); // 3

Specifications

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

Browser compatibility

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See also