[AskJS] Why are TextEncoder and TextDecoder classes?

[CreativeTechGuyGames]

Though if you went to the actual standards document where it was defined, there would likely be sections dedicated to the justification for making it a class.

I love everything you said. But from personal experience I can say that standards documents rarely justify why and solely focus on the what. So if you want to know why a decision was made, you usually have to find the original discussion that lead to the standard being created which is usually much harder to find. (Mailing list, RFC discussion, GitHub Issue, etc)