Question

Say for instance I was writing a function that was designed to accept multiple argument types:

var overloaded = function (arg) {     if (is_dom_element(arg)) {         // Code for DOM Element argument...     } }; 

What’s the best way to implement is_dom_element so that it works in a cross-browser, fairly accurate way?

Answer 1

jQuery checks the nodeType property. So you would have:

var overloaded = function (arg) {     if (arg.nodeType) {         // Code for DOM Element argument...     } }; 

Although this would detect all DOM objects, not just elements. If you want elements alone, that would be:

var overloaded = function (arg) {     if (arg.nodeType && arg.nodeType == 1) {         // Code for DOM Element argument...     } };