Underscore.js _.isError() Function

Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. _.isError() function is used to check whether the given object is javascript Error Object or not.

Note: It is very necessary to link the underscore CDN before going and using underscore functions in the browser. When linking the underscore.js CDN The "_" is attached to the browser as a global variable.

Syntax:

_.isError(object);

Parameters: It takes only one parameter i.e object.

Returns: It returns the boolean value. If the object is a inherit from Error object 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 error is created from error object

Output:

Example 2: When try catch is used to throw error.

Output:

Example 3: When given error is string type.

Output: