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jQuery isFunction() method

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jQuery isFunction() method

The isFunction() method is used to test whether the passed argument is a function or not. This method returns a Boolean value. If it finds the passed value is a function, it returns true. Otherwise, it returns false.


This method accepts a single parameter, which is defined as follows –

val – It is any value to be tested.

Let’s understand the working of the isFunction() method using an illustration.


In this example, we are using the isFunction() method to determine whether the passed values are function or not. Here, we are passing different values such as null, undefined, etc., as an argument.

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After the execution of the above code, the output will be –

jQuery isFunction() method

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