How to check if type is Boolean

How can I check if a variable's type is of type Boolean?

I mean, there are some alternatives such as:

if(jQuery.type(new Boolean()) === jQuery.type(variable))
      //Do something..

But that doesn't seem pretty to me.

Is there a cleaner way to achieve this?

That's what typeof is there for. The parentheses are optional since it is an operator.

if (typeof variable == "boolean") {
    // variable is a boolean
}