<details>
<summary class="balloon">🎈</summary>
  popped💥    
</details>

<button class="balloon" popovertarget="pop1">🎈</button>

<div id="pop1" popover>popped💥<div>

.balloon {
  display: block;
  font-size: 4em;
  border: none;
  background-color: transparent;
  padding: 0;
  margin: 0;
  height: 1em;
  width: 1em;
  list-style-type: none;
  cursor: pointer;
  -webkit-user-select: none;
	user-select: none;
  text-align: center;
}
details summary::-webkit-details-marker {
  display:none;
}