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:Â
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
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