function.name not supported in IE.

You can use Object.defineProperty to add support for it on IE9+

// Fix Function#name on browsers that do not support it (IE):
if (!(function f() {}).name) {
    Object.defineProperty(Function.prototype, 'name', {
        get: function() {
            var name = (this.toString().match(/^function\s*([^\s(]+)/) || [])[1];
            // For better performance only parse once, and then cache the
            // result through a new accessor for repeated access.
            Object.defineProperty(this, 'name', { value: name });
            return name;
        }
    });
}