JSFiddle - React, Tailwind, and code Playground

CSS

#a{
background-color: red;
}
#b{
background-color: green;
}

JavaScript

var a = $('<canvas/>',{'id':'a', 'width':100, 'height':100});
var b = $('<canvas/>',{'id':'b', 'Width':100, 'Height':100});
$('body').append(a,b);