Tooltip web component CSS

tooltip-web-component.css

@keyframes tooltipFadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

body {
  padding: 16px;
}

.tooltip {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  color: blue;
  border-bottom: 1px dotted;
  position: relative;
}

.tooltip__label {
  &:before { // for the help cursor
    content: '';
    display: flex;
    cursor: help;
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 3;
  }
}

.tooltip-dropdown {
  display: none;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  padding-top: 32px;
}

.tooltip-dropdown__content {
  color: white;
  background-color: black;
  border-radius: 4px;
  padding: 8px 12px;
  width: 300px;
  text-align: left;
}

.tooltip--open {
  .tooltip-dropdown {
    animation: tooltipFadeIn 0.15s;
    display: block;
  }
}

@media (hover: hover) {
  .tooltip:hover {
    .tooltip-dropdown {
      animation: tooltipFadeIn 0.15s;
      display: block;
    }
  }
}