usrrname/vue3-typescript

Vue 3 TypeScript Skill

Build type-safe Vue 3 applications with Composition API.

When to Use

• Creating Vue 3 components
• Using Composition API
• Setting up Vue with TypeScript
• Managing Vue state

Critical Rules

Component Structure

• Use <script setup> syntax
• Define props with defineProps<Props>()
• Use defineEmits<Emits>() for events
• Leverage defineExpose when needed

TypeScript Integration

• Enable strict mode in tsconfig.json
• Use shallowRef for large objects
• Type reactive objects properly
• Use generic components with defineComponent

Composition API

• Use composables for reusable logic
• Prefix composables with 'use'
• Return readonly objects when appropriate
• Type provide/inject with InjectionKey

State Management

• Use Pinia with TypeScript
• Define stores with setup syntax
• Type state, getters, and actions
• Use storeToRefs for reactive destructuring

Examples

Good

<script setup lang="ts">
interface Props {
  title: string;
  count?: number;
}

const props = withDefaults(defineProps<Props>(), {
  count: 0
});

const emit = defineEmits<{
  update: [value: number];
}>();

const doubled = computed(() => props.count * 2);
</script>

Related

• /typescript - TypeScript fundamentals
• /react - Compare with React patterns