How do I create reusable components in Vue 3 with TypeScript?

How do I create reusable components in Vue 3 with TypeScript?

To create reusable components in Vue 3 with TypeScript, you can define a component using the defineComponent function. Here's a simple example:

import { defineComponent } from 'vue';

export default defineComponent({
  name: 'MyComponent',
  props: {
    message: {
      type: String,
      required: true
    }
  },
  setup(props) {
    return () => <div>{props.message}</div>;
  }
});

What are the benefits of using TypeScript with Vue 3?

Using TypeScript with Vue 3 provides several benefits, including type safety, better tooling support, and improved code readability. It helps catch errors at compile time and enhances the development experience with features like autocompletion and refactoring.

Can you show me an example of a component with props and events?

Sure! Here's an example of a Vue 3 component with props and an event:

import { defineComponent } from 'vue';

export default defineComponent({
  name: 'Counter',
  props: {
    initialCount: {
      type: Number,
      default: 0
    }
  },
  setup(props, { emit }) {
    const count = ref(props.initialCount);
    const increment = () => {
      count.value++;
      emit('update:count', count.value);
    };
    return { count, increment };
  },
  template: `<div><button @click="increment">Count: {{ count }}</button></div>`
});

How do I manage state in a Vue 3 application with TypeScript?

You can manage state in a Vue 3 application using the Composition API and reactive variables. For larger applications, consider using Vuex with TypeScript for state management.