纯css悬停下划线效果

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html

css

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html

css

* {
  color: white;
}

.container {
  background-color: black;
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-flow: row wrap;
}

li {
  padding: 1rem 2rem;
}

a {
  text-decoration: none;
  position: relative;
  color: black;
  font-size: 2rem;
  font-weight: 900;
  padding: 8px 0;
}

.underline::after {
  content: "";
  border-bottom: solid 4px white;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  -webkit-transform: scaleX(0);
          transform: scaleX(0);
  -webkit-transform-origin: right;
          transform-origin: right;
  transition: -webkit-transform 0.25s;
  transition: transform 0.25s;
  transition: transform 0.25s, -webkit-transform 0.25s;
}
.underline:hover::after {
  -webkit-transform-origin: left;
          transform-origin: left;
  -webkit-transform: scaleX(1);
          transform: scaleX(1);
}
@-webkit-keyframes underline {
  from {
    -webkit-transform: scaleX(0);
            transform: scaleX(0);
  }
  to {
    -webkit-transform: scaleX(1);
            transform: scaleX(1);
  }
}
@keyframes underline {
  from {
    -webkit-transform: scaleX(0);
            transform: scaleX(0);
  }
  to {
    -webkit-transform: scaleX(1);
            transform: scaleX(1);
  }
}
@media only screen and (max-width: 992px) {
  li {
    width: 100%;
    text-align: center;
    margin-bottom: 1rem;
  }
}

JavaScript

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