jQuery is() Method
Example
If the parent of <p> is a <div> element, alert some text:
  
    if ($("p").parent().is("div")) {
    alert("Parent of p is div"); 
}
Try it Yourself »
Definition and Usage
The is() method checks if one of the selected elements matches the selectorElement.
Syntax
$(selector).is(selectorElement,function(index,element))
| Parameter | Description | 
|---|---|
| selectorElement | Required. Specifies a selector expression, element or a jQuery object to match the current set of elements against. Returns true if there is at least one match from the given argument, and false if not. | 
| function(index,element) | Optional. Specifies a function to run for the group of selected elements. 
 | 

