Date: 2020jul17 Language: javaScript Q. Minimal web component A. A pretty nice one is here https://gist.github.com/rjsteinert/779d94dfc886723c2967a6f5f56beecd Usage:

<script src='js/counter.js'></script> <my-counter/>

More discussion: https://news.ycombinator.com/item?id=23871367