- ES6 Tutorial
- ES6 - Home
- ES6 - Overview
- ES6 - Environment
- ES6 - Syntax
- ES6 - Variables
- ES6 - Operators
- ES6 - Decision Making
- ES6 - Loops
- ES6 - Functions
- ES6 - Events
- ES6 - Cookies
- ES6 - Page Redirect
- ES6 - Dialog Boxes
- ES6 - Void Keyword
- ES6 - Page Printing
- ES6 - Objects
- ES6 - Number
- ES6 - Boolean
- ES6 - Strings
- ES6 - Symbol
- ES6 - New String Methods
- ES6 - Arrays
- ES6 - Date
- ES6 - Math
- ES6 - RegExp
- ES6 - HTML DOM
- ES6 - Iterator
- ES6 - Collections
- ES6 - Classes
- ES6 - Maps And Sets
- ES6 - Promises
- ES6 - Modules
- ES6 - Error Handling
- ES6 - Object Extensions
- ES6 - Reflect API
- ES6 - Proxy API
- ES6 - Validations
- ES6 - Animation
- ES6 - Multimedia
- ES6 - Debugging
- ES6 - Image Map
- ES6 - Browsers
- ES7 - New Features
- ES8 - New Features
- ES9 - New Features
- ES6 Useful Resources
- ES6 - Quick Guide
- ES6 - Useful Resources
- ES6 - Discussion
ES6 - Collections Set Method has()
Returns a boolean indicating whether an element with the specified value exists in a Set object or not.
Syntax
mySet.has(value);
Parameters
Value − The value for which existence check should be done.
Return Value
Returns true if an element with the specified value exists in the Set object; otherwise false.
Example
var mySet = new Set();
mySet.add("Jim");
console.log(mySet.has("Jim"));
console.log(mySet.has("Tom"));
Output
true false
Advertisements