Detect DOM object vs. jQuery Object

Question

I have a function that I want to be able to allow passing in either a regular javascript DOM element object or a jQuery object. If its not yet a jQuery object I will then make i

Answer 1

The easiest way is to simply pass it into the jQuery function either way. If it's already a jQuery object, it will return it unchanged:

function(elem){
   elem = $(elem);
   ...
}

From the jQuery source code, this is what's happening:

if (selector.selector !== undefined) {
    this.selector = selector.selector;
    this.context = selector.context;
}

return jQuery.makeArray( selector, this );

Where makeArray is merging the new (default) jQuery object with the passed in one.