jQuery / Javascript code check, if not undefined

Question

Is this code good?

var wlocation = $(this).closest('.myclass').find('li a').attr('href');
if (wlocation.prop !== undefined) { window.location = wlocation; }

or should I do

var wlocation = $(this).closest('.myclass').find('li a').attr('href');
if (wlocation.prop !== "undefined") { window.location = wlocation; }

question from:https://stackoverflow.com/questions/13607712/jquery-javascript-code-check-if-not-undefined

Answer 1

I like this:

if (wlocation !== undefined)

But if you prefer the second way wouldn't be as you posted. It would be:

if (typeof wlocation  !== "undefined")