Knowledge 16 ECMAScript Session Ok, so it may not be official yet and I know this is a weird thing to get worked up about. Besides, ECMAScript 5 is so 2011, you say. Weren’t we still talking about DVD’s in 2011? Shouldn’t we be talking about ES 6 / ECMAScript 2015? Aren’t we already using polyfills for that? I hear you. I’m with you. But let’s not forget that a lot of code runs on top of ServiceNow’s modified Rhino engine, including yours and mine.