element.hasAttribute

The Element.hasAttribute() method returns a Boolean value indicating whether the specified element has the specified attribute or not.

Syntax

var result = element.hasAttribute(name);

result

holds the return value true or false.

name

is a string representing the name of the attribute.

Example

var foo = document.getElementById("foo"); 
if (foo.hasAttribute("bar")) { 
    // do something
}

Polyfill

;(function(prototype) {
    prototype.hasAttribute = prototype.hasAttribute || function(name) {
        return !!(this.attributes[name] && 
                  this.attributes[name].specified);
    }
})(Element.prototype);

Notes

DOM methods dealing with element's attributes:

Specifications

Browser compatibilityUpdate compatibility data on GitHub