A **JavaScript set** is a collection of unique elements that can be traversed in the same order in which they were inserted.

> A set can store primitive or object values​.


# Syntax

# Code

The example below shows how to create a set in JavaScript:

var example_set = new Set(["apple","bannana","mango","kiwi"]); 
console.log(example_set)

# Set class methods and properties

There are various methods and properties implemented in the `Set` class. A few of them are described below.

- **`Set.prototype.size`** returns the number of elements in the set.

- **`Set.prototype.add(val)`** adds the new element `val` at the end of the Set object.

- **`Set.prototype.delete(val)`** deletes the element `val` from the Set object.

- **`Set.prototype.clear()`** removes all the elements from the set.

- **`Set.prototype.has(val)`** returns *true* if `val` is present in the Set object.

- **`Set.prototype.values()`** returns all the values from the Set in the same insertion order.


# Code

The example below shows​ how various set class methods and attributes are used: 

var fruits = new Set(["apple","bannana","mango","kiwi"]); 

// print size of the set
console.log(fruits.size)

// add "orange" to fruits.
fruits.add("orange")
console.log(fruits.values())

// remove "kiwi" from fruits.
fruits.delete("kiwi")
console.log(fruits.values())

// check if fruits contains "apple"
console.log(fruits.has("apple"))

// clear the set
fruits.clear()
console.log(fruits.values())

What is the JavaScript set?

A JavaScript set is a collection of unique elements with methods for adding, deleting, and checking values.