HTMLDocument.registerElement is deprecated.

[szrce]

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

HTMLDocument.registerElement (file:///usr/lib/atom/static/index.js:166:12)
registerElement (/home/rookie/.atom/packages/ftp-remote-edit-plus/node_modules/space-pen/lib/space-pen.js:66:88)
Builder.openTag (/home/rookie/.atom/packages/ftp-remote-edit-plus/node_modules/space-pen/lib/space-pen.js:297:27)
Builder.tag (/home/rookie/.atom/packages/ftp-remote-edit-plus/node_modules/space-pen/lib/space-pen.js:274:12)
Function.div (/home/rookie/.atom/packages/ftp-remote-edit-plus/node_modules/space-pen/lib/space-pen.js:83:49)
Function.content (/home/rookie/.atom/packages/ftp-remote-edit-plus/lib/views/tree-view.js:649:19)