I thought this would be as easy as:
if(typeof(Array.push) == 'undefined'){
//not defined, prototype a version of the push method
// Firefox never gets here, but IE/Safari/Chrome/etc. do, even though
// the Array object has a push method!
}
And it does work fine in Firefox, but not in IE, Chrome, Safari, Opera, they return all properties/methods of the native Array object as 'undefined' using this test.
The .hasOwnProperty( prop ) method only works on instances... so it doesn't work, but by trial and error I noticed that this works.
//this works in Firefox/IE(6,7,8)/Chrome/Safari/Opera
if(typeof(Array().push) == 'undefined'){
//not defined, prototype a version of the push method
}
Is there anything wrong with using this syntax to determine if a property/method exists on a Native Object / ~"JavaScript Class"~, or is there a better way to do this?
The proper way to check if a property exists:
if ('property' in objectVar)