The _.isInstanceOf() method checks whether the given value is the instance of a given constructor or not and returns the corresponding boolean value.
Syntax:
_.isInstanceOf(value, constructor);
Parameters:
- value: Given value to be checked for instance.
- constructor: Given constructor.
Return Value: This method returns a Boolean value(Returns true if the given value is instance, else false).
Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed. Underscore.js contrib library can be installed using npm install underscore-contrib .
Example 1:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Instance Of constructor : " + _.isInstanceOf(new Date(),Date));
|
Output:
The Value is Instance Of constructor : true
Example 2:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Instance Of constructor : " + _.isInstanceOf("abc",Date));
|
Output:
The Value is Instance Of constructor : false