.icon {
  background: #888;
  padding: 15px;
  border-radius: 8px;
  width: 44px;
  height: 44px;
  line-height: 44px;
  text-align: center;
  position: relative;
  font-size: 32px;
  &:hover .tooltip {
    transition-delay: 3s;
    width: auto;
    height: auto;
    clip: initial;
    opacity: 1;
    visibility: visible;
  }
}

.tooltip {
  position: absolute;
  font-size: 16px;
  width: 1px;
  height: 1px;
  padding: 0;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  background: black;
  color: white;
  line-height: normal;
  top: 50%;
  transform: translateY(-50%);
  left: 90%;
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  opacity: 0;
  visibility: hidden;
  transition: 0.2s;
  &::before {
    content: "";
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    position: absolute;
    z-index: 1;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 5px solid transparent;
    border-right: 5px solid black;
  }
}

body {
  height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
}
View Compiled
import React from "https://cdn.skypack.dev/react@17.0.1";
import ReactDOM from "https://cdn.skypack.dev/react-dom@17.0.1";

const App = () => {
  return (
    <div className="icon">
      🤙
      <span className="tooltip">Hang Loose</span>
    </div>
  );
};

ReactDOM.render(<App />, document.body);
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.