koel/resources/assets/js/components/layout/main-wrapper/sidebar/SidebarItem.vue

<template>
  <li
    :class="current && 'current'"
    class="relative before:right-0 px-6 before:top-1/4 before:w-[4px] before:h-1/2 before:absolute before:rounded-full
    before:transition-[box-shadow,_background-color] before:ease-in-out before:duration-500"
  >
    <a
      :href="props.href"
      class="flex items-center overflow-x-hidden gap-3 h-11 relative active:pt-0.5 active:pr-0 active:pb-0 active:pl-0.5
      !text-k-text-secondary hover:!text-k-text-primary"
    >
      <span class="opacity-70">
        <slot name="icon" />
      </span>

      <span class="overflow-hidden text-ellipsis whitespace-nowrap">
        <slot />
      </span>
    </a>
  </li>
</template>

<script lang="ts" setup>
import { ref } from 'vue'
import { useRouter } from '@/composables'

const props = withDefaults(defineProps<{ href?: string | undefined; screen?: ScreenName | undefined }>(), {
  href: undefined,
  screen: undefined
})

const current = ref(false)

const { onRouteChanged } = useRouter()

if (screen) {
  onRouteChanged(route => current.value = route.screen === props.screen)
}
</script>

<style lang="postcss" scoped>
li.current {
  a {
    @apply text-k-text-primary !important;
  }

  &::before {
    @apply bg-k-highlight !important;
    box-shadow: 0 0 40px 10px var(--color-highlight);
  }
}
</style>