Loader.vue

<template functional>
  <div class="loader">
    <div></div>
    <div></div>
    <div></div>
  </div>
</template>

<style>
@keyframes loader {
  to {
    opacity: 0.25;
    transform: translate3d(0, -1rem, 0);
  }
}
.loader {
  display: flex;
  justify-content: center;
}
.loader > div {
  width: 1rem;
  height: 1rem;
  margin: 3rem 0.2rem;
  background: #8385aa;
  border-radius: 50%;
  animation: loader 0.6s infinite alternate;
}
.loader > div:nth-child(2) {
  animation-delay: 0.2s;
}
.loader > div:nth-child(3) {
  animation-delay: 0.4s;
}
</style>