CustomEvent is not newable in IE11

[iwate]

Hi,
ripples.js is very good! However an error has occurred in IE11.

the error in line 48

rippleEnd           = new CustomEvent("rippleEnd", {detail: $ripple}),

IE11's CustomEvent is not able to new.
I add some code and use in my project.
It is following code and exec in if browser's CustomEvent is not newable.

rippleEnd = document.createEvent("CustomEvent");
rippleEnd.initCustomEvent("rippleEnd", false, false, { detail: $ripple });

for your information.

I thank you for reading my funny english through.