JSFiddle - React, Tailwind, and code Playground

CSS

div{
  border: dashed 1px red;
}

JavaScript

;(function(d){
let c='createElement',k='textContent',f='appendChild',i=0,b,t=d[c]('div');d.body[f](t);
while(++i<7)b=d[c]('button'),b[k]=i,b.onclick=function(){t[k]=this[k]},d.body[f](b)
})(document);