The way to create a Vue 3 TypeScript project using Vite is to execute the command npm create vite@latest my-vue-ts-app -- --template vue-ts, then install the dependency and run the project. 1. After creating the project, use
The combination of TypeScript and Vue has become very mature, especially in Vue 3, and the official support for TypeScript is more friendly. If you are already familiar with Vue, want to introduce TypeScript into your project, or plan to build a Vue project with TypeScript from scratch, it is actually not complicated.
Create TypeScript Projects with Vue 3 Vite
The easiest way is to create a Vue TypeScript project through Vite. Vite provides templates that are out of the box, and the configuration has been handled for you.
Execute the command:
npm create vite@latest my-vue-ts-app -- --template vue-ts
This creates a Vue and TypeScript-based project. After entering the directory, install the dependencies and run:
cd my-vue-ts-app npm install npm run dev
This way you have a Vue project that supports TypeScript. Vite will automatically process the compilation of .ts and .vue files.
Using TypeScript in Components
Vue 3 supports the use of <script setup> syntax, and it is very natural to combine TypeScript. You can use type annotations directly in defineProps :
<script setup lang="ts">
interface Props {
title: string
count?: number
}
const props = defineProps<Props>()
</script>If you are using the option API, you can also write it like this:
export default {
props: {
title: String as PropType<string>,
count: Number
}
} Remember to introduce PropType to provide type information for complex types:
import type { PropType } from 'vue'Type-safe responsive data
Type annotations can also be added when using ref and reactive :
import { ref } from 'vue'
const count = ref<number>(0)Or automatic derivation:
const name = ref('Alice') // The type is automatically deduced to string
If you are storing objects or arrays, it is recommended to declare the type explicitly, which can avoid the problem of inaccurate type derivation.
Type support for routing and state management
- Vue Router : When defining routing configuration, you can use the TypeScript interface to define the types of fields such as meta, params, etc.
- Pinia : Pinia officially fully supports TypeScript. When defining a store, you can directly use generics or interfaces to constrain the type of state.
For example:
import { defineStore } from 'pinia'
interface User {
id: number
name: string
}
export const useUserStore = defineStore('user', {
state: (): { user: User | null } => ({
user: null
})
})This method allows you to get full type prompts and checks when calling the store.
Basically that's it. TypeScript integration in Vue projects is already very smooth, and can get good type support whether it is component communication, state management or routing configuration. You just need to select a template when creating a project and then use type annotations reasonably in the code to enjoy the benefits of type safety.
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