getElementByClassName always returns empty array

Question

I´m trying to get elements by class name out of my Google Chrome Extension, but I´m getting always an empty array back.

The classes I´m looking for do definately exist.

enter image description here

var myClasses= document.getElementsByClassName("className");

I´m using the Google Chrome Browser.

Am I missing something?

What className do you want to get? Are you sure you have elements with this className? Where do you make this call? Are you sure that the page is fully loaded before calling this? If you post more code, it will be easier to help you out. — service-paradis, Mar 03 '14 at 14:42
Can't really help you much without some HTML to check it against I'm afraid as your javascript declaration looks fine. — BenM, Mar 03 '14 at 14:42
Just tested here. [Look](http://i.imgur.com/MtX5W8B.png) @putvande Edit: also tested in chromium. I don't have chrome sorry, but I belive you — radubogdan, Mar 03 '14 at 14:47
Sry, I´m developing an google chrome extension, forget to mention that. It doesn´t work with any class — Marian Klühspies, Mar 03 '14 at 14:52

Paul Rad · Answer 1 · 2014-03-03T15:05:52.457

0

Try this and give me the results:

var elements = document.getElementsByTagName('div'); // or other html element
for (var i = 0; i < elements.length; i++) {
 console.log(elements.className);
}

edited Mar 03 '14 at 15:05

answered Mar 03 '14 at 14:43

Paul Rad

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I´m developing a google chrome extension. As I understood, the script does only get called if the document has already loaded. I tried your code, but it doesn´t get called at all – Marian Klühspies Mar 03 '14 at 14:50
1

In this case, look at this solution ;) http://stackoverflow.com/questions/5113318/in-a-chrome-extension-content-script-must-i-wait-for-document-ready-before-proc – Paul Rad Mar 03 '14 at 14:51
Thank you, but it doesn´t change anything :( I´ve checked document.readyState which returns "interactive" – Marian Klühspies Mar 03 '14 at 14:58
try the code in my updated response and say if the desired element exists – Paul Rad Mar 03 '14 at 15:06
1

I´m getting 662 undefined – Marian Klühspies Mar 03 '14 at 15:11

getElementByClassName always returns empty array

1 Answers1