Public class properties

[damianobarbati]

Caniuse does not support class fields! :)

https://developers.google.com/web/updates/2018/12/class-fields
https://www.chromestatus.com/feature/6001727933251584

[Ugoku]

Available since MDN info was integrated: https://caniuse.com/#feat=mdn-javascript_classes_public_class_fields