Just running it!

The start of the docs has " import {EditorState} from "@codemirror/state""

So right off, how can that work in JavaScript?

“@”?

I cloned the repo, I did the steps in the README. Where is the actual huge Javascript file which is the built editor which that build step built?

There is no such huge JavaScript file. This library is distributed as a bunch of npm packages. You’ll have to learn some modern JavaScript to use it.

So…

Any documentation as to really how to use it? Or not?

Mkay. Guess I’ll use GitHub - microsoft/monaco-editor: A browser based code editor then.