Vue 3 Composition API in Practice

Practical patterns for Vue 3 Composition API with TypeScript.

Reactive State

typescript

const count = ref(0)
const doubled = computed(() => count.value * 2)

Extract reusable logic into composables:

typescript

function useCounter(initial = 0) {
  const count = ref(initial)
  const increment = () => count.value++
  return { count, increment }
}

Keep composables focused and small. One composable, one concern.