blog/frontend/app/components/LanguageSwitcher.vue

<script setup lang="ts">
const { locale, locales, t } = useI18n()
const switchLocalePath = useSwitchLocalePath()
const router = useRouter()

/**
 * A native select: it gets keyboard support, the platform picker on mobile and
 * correct labelling for free, which a hand-built dropdown would have to rebuild.
 */
function onChange(event: Event) {
  const code = (event.target as HTMLSelectElement).value as typeof locale.value
  const path = switchLocalePath(code)
  if (path) router.push(path)
}
</script>

<template>
  <div class="switcher">
    <label class="visually-hidden" for="locale-select">{{ t('site.languageLabel') }}</label>
    <select id="locale-select" :value="locale" @change="onChange">
      <option v-for="option in locales" :key="option.code" :value="option.code">
        {{ option.name }}
      </option>
    </select>
    <span class="arrow" aria-hidden="true">▾</span>
  </div>
</template>

<style scoped>
.switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
}

select {
  appearance: none;
  padding: 0.4rem 1.7rem 0.4rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 0;
  background: transparent;
  color: var(--color-body);
  font: inherit;
  /* Safari on iOS zooms the page when a control smaller than 16px is tapped,
     so the picker stays at 1rem on phones and shrinks only from tablet up. */
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
}

@media (min-width: 48rem) {
  select {
    padding: 0.35rem 1.6rem 0.35rem 0.7rem;
    font-size: 0.75rem;
  }
}

select:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.arrow {
  position: absolute;
  right: 0.6rem;
  font-size: 0.65rem;
  pointer-events: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
</style>