HTMLDocument.registerElement is deprecated.

Use customElements.define instead of document.registerElement see https://javascript.info/custom-elements

HTMLDocument.registerElement (file:///usr/lib/atom/resources/app.asar/static/index.js:160:12)
registerElement (/home/panda/.atom/packages/recent-projects/node_modules/space-pen/lib/space-pen.js:66:88)
Builder.openTag (/home/panda/.atom/packages/recent-projects/node_modules/space-pen/lib/space-pen.js:297:27)
Builder.tag (/home/panda/.atom/packages/recent-projects/node_modules/space-pen/lib/space-pen.js:274:12)
Function.div (/home/panda/.atom/packages/recent-projects/node_modules/space-pen/lib/space-pen.js:83:49)
Function.content (/home/panda/.atom/packages/recent-projects/lib/recent-projects-view.js:526:16)

[GuilhemN]

Thanks for the report!
As you can see, this repository has not been updated in a while, and I am no longer using Atom.

If you're interest in maintaining it I can give you write rights on this repository.

I really only posted this issue because it popped up in Atom and I thought others might want to know about it. But I figured this wasn't being maintained anymore and don't expect it to get fixed. I found another, similar plugin today that I'm trying instead, so I'll see how that goes before I consider contributing here...