JavaScript Set keys()

Definition and usage

keys() The method returns an iterator object containing the values of the Set.

keys() The method does not change the original Set.

Instance

Example 1

// Create a Set
const letters = new Set(["a", "b", "c"]);
// Get values
const myIterator = letters.keys();
// List values
let text = "";
for (const x of myIterator) {
  text += x;
}

Try it yourself

Example 2

Directly traverse set.keys():

// Create a Set
const letters = new Set(["a", "b", "c"]);
// List all elements
let text = "";
for (const x of letters.keys()) {
  text += x;
}

Try it yourself

Syntax

set.keys()

Parameters

None.

Return value

Browser support

set.keys() Is a feature of ECMAScript6 (ES6).

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

Internet Explorer Does Not Support set.keys().