Lodash _.isMap() Method

The Lodash _.isMap() Method checks whether the given value is a map object or not and returns the corresponding boolean value.

Syntax:

_.isMap( value )

Parameters: This method accepts single parameter as mentioned above and described below:

• value: This parameter holds the value that need to be check for a map object.

Return Value: This method returns a Boolean value(Returns true if the given value is a map object, else false).

Example 1: 

Javascript

// Defining Lodash variable
const _ = require('lodash');

var testMap = new Map;

// Checking for Map
console.log("The Value is Map : "
        + _.isMap(testMap));

Output:

The Value is Map : true

Example 2: For a WeakMap object, this method returns false.

Javascript

// Defining Lodash variable
const _ = require('lodash');

var testMap = new WeakMap;

// Checking for Map
console.log("The Value is Map : "
        + _.isMap(testMap));

Output:

The Value is Map : false

Example 3: For strings, it returns false.

Javascript

// Defining Lodash variable
const _ = require('lodash');

// Checking for Map
console.log("The Value is Map : "
        + _.isMap("map"));

Output:

The Value is Map : false