front-cli / fw-h5app-template

.loading-progress {
  width: 120px;
  height: 22px;
  border-radius: 20px;
  color: var(--color-loading-bar, #514b82);
  border: 2px solid;
  position: relative;
}
.loading-progress::before {
  content: '';
  position: absolute;
  margin: 2px;
  inset: 0 100% 0 0;
  border-radius: inherit;
  background: var(--color-loading-bar, #514b82);
  animation: p6 2s infinite;
}

@keyframes p6 {
  100% {
    inset: 0;
  }
}