JavaScript new Set()

Definition and usage

new Set() The constructor is used to create a Set object.

Instance

Example 1

// Create a Set
const letters = new Set(["a", "b", "c"]);

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Example 2

Create an empty Set and add values:

// Create a Set
const letters = new Set();
// Add values to Set
letters.add("a");
letters.add("b");
letters.add("c");

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Syntax

new Set(iterable)

Parameter

Return value

Browser support

Set is a feature of ECMAScript6 (ES6).

Since June 2017, all modern browsers have supported ES6 (JavaScript 2015):

Internet Explorer does not support Set.