Underscore.JS - isWeakSet method

Syntax

_.isWeakSet(object)

isWeakSet method checks if object is a WeakSet. See the below example −

Example

var _ = require('underscore');

//Example 1: Check if argument passed is a WeakSet
console.log(_.isWeakSet(new WeakSet()));

//Example 2: Check if argument passed is a WeakSet
console.log(_.isWeakSet('Test'));

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

true
false