Underscore.js _.isWeakMap() Function (original) (raw)

Last Updated : 25 Nov, 2021

Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. _.isWeakMap() function is used to check whether the given object is javascript weakmap or not. When linking the underscore.js CDN The "_" is attached to the browser as global variable.

Syntax:

_.isWeakMap(object);

Parameters :

• object: It is any javascript object such as array, string, maps, set etc.

Returns: It returns the boolean value. If the object is a weak map of javascript it returns true otherwise false is returned by the function.

Few Examples are given below for a better understanding of the function.

Example 1: When an array is given the output is false.

javascript ``

``

Output:

Example 2:

When a weak set is given it returns true.

javascript ``

``

Output:

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