The functionality of getAttribute has changed in Firefox 3.5 and IE8, no longer behaving as it did before

Creating a JavaScript function to locate an anchor in a page (specifically with, not an id) and then going through its parent elements until finding one that contains a specified class. The code below works perfectly in Firefox 3.0 but encounters issues with getAttribute in Firefox 3.5 and Internet Explorer 8.

var tab = document.getElementsByName(headerName).item(0);

while (tab.getAttribute('class') != 'card') {
    tab = tab.parentNode;
}

While it would be simpler with jQuery, I am limited in my options. How has getAttribute been modified in these newer browsers and how can this issue be resolved?

javascriptinternet-explorerfirefox

Answer №1

Give tab.className a shot?

Answer №2

My initial assumption is that the variable 'tab' might be undefined if .className doesn't return anything.

I suspect there may be an issue with

document.getElementsByName(headerName).item(0);

To troubleshoot, I recommend setting a breakpoint on the while loop using Firebug. Then, type "tab" in the console and press Enter. If Firebug isn't available for FF 3.5, try exploring alternative methods to access the desired elements.

Answer №3

When it comes to Internet Explorer, document.getElementsByName() is known for not functioning properly.

According to web standards, this function should return elements with a matching "name" attribute value or just input elements of a form.

http://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-71555259

http://www.w3.org/TR/xhtml1/#h-4.10

One workaround could be assigning names to the "class" attributes and using document.getElementsByTagName() to target specific elements in the document. However, this method can be slow when scanning through all tags of that kind.

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