Tooltip

<div className={styles.copyIconContainer}>
  <span className={styles.tooltipText}>
    {isCopied ? "Copied" : "Copy on clipboard"}
  </span>
</div>

.tooltipText {
  visibility: hidden;
  width: 120px;
  background-color: #2d3469;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  top: 100%;
  left: 50%;
  margin-left: -60px;
  font-size: 1rem;
}

.tooltipText::after {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent #2d3469 transparent;
}

.copyIconContainer:hover .tooltipText {
  visibility: visible;
  cursor: pointer;
}

This results in something like the following: