Question

This code is throwing the following error in IE, but not in any other browser:

'undefined' is null or not an object

Does anyone know why? I can’t find what’s wrong with the code.

jQuery(document).ready(
    function() {
        jQuery("ul.sf-menu").supersubs({
            minWidth: 12,
            maxWidth: 27,
            extraWidth: 1,
        }).superfish({
            delay: 100,
            animation: { opacity: 'show' },
            speed: 'fast'
        });
    }
);

Answer 1

Try removing the extra comma after extraWidth: 1.

Note: I do not have IE on this computer so I can’t test this, but your syntax is completely correct otherwise. My guess is that IE sees the extra comma, fails, and passes undefined to supersubs instead.