Cant seem to get it working, always producing error

[mikeerickson]

In short, I have a simple <textarea>

....
<textarea id="editor-content"></textarea>
....

let HyperMD = require('hypermd')
let myTextarea = document.getElementById('editor-content')
let editor = HyperMD.fromTextArea(myTextarea)

Debugger error

Does a dead simple example exist which I can try? The documentation would lead to believe this to be a simple example? Should the element being targeted be a <textarea> or something else?