84 lines
1.6 KiB
Markdown
84 lines
1.6 KiB
Markdown
1
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## 问 & 答
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问： 为什么vue项目要抛弃SFC写法而尝试jsx/tsx方式来编码？
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答：https://juejin.cn/post/6911175470255964174
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问：不会 vue3 jsx 语法，怎么办？
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答：https://juejin.cn/post/7141674726434439176
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问：vue3 jsx defineComponent 语法，实际项目中 setup 代码太长，怎么办？
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答：使用组合式函数 (Composables) - 最推荐
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案例：
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```jsx
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// composables/useUserData.js
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import { ref, onMounted } from 'vue'
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import api from '@/api'
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export function useUserData(userId) {
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const user = ref(null)
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const loading = ref(false)
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const error = ref(null)
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const fetchUser = async () => {
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loading.value = true
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try {
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user.value = await api.getUser(userId)
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} catch (err) {
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error.value = err.message
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} finally {
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loading.value = false
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}
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}
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onMounted(fetchUser)
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return {
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user,
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loading,
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error,
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refetch: fetchUser
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}
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}
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```
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主组件：
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```jsx
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// UserProfile.jsx
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import { defineComponent } from 'vue'
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import { useUserData } from '@/composables/useUserData'
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export default defineComponent({
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name: 'UserProfile',
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props: {
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userId: {
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type: String,
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required: true
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}
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},
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setup(props) {
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const { user, loading, error, refetch } = useUserData(props.userId)
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return () => (
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<div>
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{loading.value && <div>Loading...</div>}
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{error.value && <div>Error: {error.value}</div>}
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{user.value && (
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<div>
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<h2>{user.value.name}</h2>
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<p>{user.value.email}</p>
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</div>
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)}
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</div>
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)
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}
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})
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``` |