Underscore.js _.isFunction() Function
The _.isFunction() function is used to check whether the given object is function or not. It returns a Boolean value True if the given object is a function and returns False otherwise.
Syntax:
_.isFunction( object )
Parameters: This function accepts single parameter as mentioned above and described below:
- object: It contains the value of object that need to be check whether the object is function or not.
Return Value: It returns True if the given object is function and False otherwise.
Example 1:
<!DOCTYPE html> < html > < head > < script type = "text/javascript" src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" > </ script > </ head > < body > < script type = "text/javascript" > console.log(_.isFunction(function (element) { return element % 2 != 0; })); console.log(_.isFunction(function (n) { return n < 2 ? n : fib(n - 1) + fib(n - 2); })); </script> </ body > </ html > |
Output:
Example 2:
<!DOCTYPE html> < html > < head > < script type = "text/javascript" src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" > </ script > </ head > < body > < script type = "text/javascript" > console.log(_.isFunction(alert)); console.log(_.isFunction(console.log)); console.log(_.isFunction('BeginnergorBeginner')); </ script > </ body > </ html > |
Output:
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