JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div { position:relative; background-color:#333;
      padding:20px; margin:20px; float:left; 
}

div span { content:""; display:block; 
    padding:5px; background-color:#f60; border:2px solid white; 
    position: absolute; top:-2px; right:-2px; border-bottom-left-radius: 10px; 
}

JavaScript

var item = $('<span />');
item.click(function() { alert('click'); }); 
$('div').append(item);