Why Do My `` onclick Event Handlers Fail in IE8, and How Can I Fix Them?

IE8 "Onclick" Event Listener Issues with

Tags

When using the provided JavaScript code in IE8, the "onclick" event handler for

elements may not function as expected. This issue stems from the lack of support for the "addEventListener" method in IE8 and earlier versions of the browser.

Solution:

To resolve this issue, a workaround involving the non-standard predecessor to "addEventListener" in IE8, namely "attachEvent," can be employed. Here's a modified version of the JavaScript code that uses this method:

hookEvent(document.getElementById("hd_vertical"), "click", function(e) {
        if(e.target.nodeName == "LI") { 
            var _anchor = e.target.id;
            changeLocation(_anchor);
        } else if(e.target.nodeName == "SPAN") {
            var span = e.target;
            var li = span.parentNode;
            var _anchor = li.id;   
            changeLocation(_anchor);
    }
});

Here's how this code works:

• hookEvent: This function checks for the availability of "addEventListener" or "attachEvent" and uses the appropriate version for the respective browser.
• OldIEHookEvent: This function attaches event handlers to elements using "attachEvent" in IE8 and earlier browsers. It also polyfills missing functions like "preventDefault" and "stopPropagation."

Note: IE8 also lacks support for "getElementsByClassName." Consider using "querySelector" or "querySelectorAll" instead:

var _url = document.querySelector("." + id).getAttribute('href');

By implementing these changes, "onclick" event handlers for

elements should now function properly in IE8.

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