JavaScript Set has() Method (original) (raw)

Last Updated : 12 Jul, 2024

The **Set.has() method in JavaScript is used to check whether an element with a specified value exists in a Set or not. It returns a boolean value indicating the presence or absence of an element with a specified value in a Set.

**Syntax:

mySet.has(value);

**Parameters:

**Example 1: In this example, we have used **sethas() method.

JavaScript `

// Create a new set using Set() constructor let myset = new Set();

// Append new elements to the // set using add() method myset.add(23); myset.add(12);

// As 23 exists 23, it will return true console.log(myset.has(23));

`

**Example 2: In this example, we have used **sethas() method.

JavaScript `

// Create a new set using Set() constructor let myset = new Set();

// Append new elements to the // set using add() method myset.add("Chicago"); myset.add("California"); myset.add("London");

// As London exists in the set,
// it will return true console.log(myset.has("London"));

// As Manchester does not exist in the // set, it will return false console.log(myset.has("Manchester"));

`

**Supported Browsers:

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