如何对 Vue 3 上的路由更改做出反应,"script setup" 组合 API?
How to react to route changes on Vue 3, "script setup" composition API?
这是我的应用程序中的路由示例:
{
path: "/something",
name: "SomeRoute",
component: SomeComponent,
meta: {showExtra: true},
},
{
path: "/somethingElse",
name: "SomeOtherRoute",
component: SomeOtherComponent,
},
然后我有以下组件,您会注意到它有两个 script
标签,一个有组成 API,一个没有:
<template>
<div>
This will always be visible. Also here's a number: {{ number }}
</div>
<div v-if="showExtra">
This will be hidden in some routes.
</div>
</template>
<script setup lang="ts">
import type { RouteLocationNormalized } from "vue-router"
import { ref } from "vue"
const number = 5
const showExtra = ref(true)
const onRouteChange = (to: RouteLocationNormalized) => {
showExtra.value = !!to.meta?.showExtra
}
</script>
<script lang="ts">
import { defineComponent } from "vue"
export default defineComponent({
watch: {
$route: {
handler: "onRouteChange",
flush: "pre",
immediate: true,
deep: true,
},
},
})
</script>
这工作正常:当我输入带有 meta: {showExtra: false}
的路线时,它会隐藏额外的 div,否则会显示它。
然而,我想做的是仅使用组合 API 来实现相同的目的,换句话说,完全删除第二个 <script>
标记。我试过这个:
<script setup lang="ts">
import type { RouteLocationNormalized } from "vue-router"
import { ref } from "vue"
import { onBeforeRouteUpdate } from "vue-router"
// ...
// same as before
// ...
onBeforeRouteUpdate(onRouteChange)
</script>
但是当我切换路由时,这并没有像预期的那样生效。我知道我可以导入 watch
函数,但我不确定如何获取有关路由的元信息以及如何安抚类型检查器。
您可以通过从 vue
导入 watch
方法将观察者转换为组合 api
<script lang="ts">
import { defineComponent, vue } from "vue"
import { useRoute } from "vuex"
export default defineComponent({
setup() {
const route = useRoute()
watch(route, (to) => {
showExtra.value = !!to.meta?.showExtra
}, {flush: 'pre', immediate: true, deep: true})
},
})
</script>
这是我的应用程序中的路由示例:
{
path: "/something",
name: "SomeRoute",
component: SomeComponent,
meta: {showExtra: true},
},
{
path: "/somethingElse",
name: "SomeOtherRoute",
component: SomeOtherComponent,
},
然后我有以下组件,您会注意到它有两个 script
标签,一个有组成 API,一个没有:
<template>
<div>
This will always be visible. Also here's a number: {{ number }}
</div>
<div v-if="showExtra">
This will be hidden in some routes.
</div>
</template>
<script setup lang="ts">
import type { RouteLocationNormalized } from "vue-router"
import { ref } from "vue"
const number = 5
const showExtra = ref(true)
const onRouteChange = (to: RouteLocationNormalized) => {
showExtra.value = !!to.meta?.showExtra
}
</script>
<script lang="ts">
import { defineComponent } from "vue"
export default defineComponent({
watch: {
$route: {
handler: "onRouteChange",
flush: "pre",
immediate: true,
deep: true,
},
},
})
</script>
这工作正常:当我输入带有 meta: {showExtra: false}
的路线时,它会隐藏额外的 div,否则会显示它。
然而,我想做的是仅使用组合 API 来实现相同的目的,换句话说,完全删除第二个 <script>
标记。我试过这个:
<script setup lang="ts">
import type { RouteLocationNormalized } from "vue-router"
import { ref } from "vue"
import { onBeforeRouteUpdate } from "vue-router"
// ...
// same as before
// ...
onBeforeRouteUpdate(onRouteChange)
</script>
但是当我切换路由时,这并没有像预期的那样生效。我知道我可以导入 watch
函数,但我不确定如何获取有关路由的元信息以及如何安抚类型检查器。
您可以通过从 vue
导入watch
方法将观察者转换为组合 api
<script lang="ts">
import { defineComponent, vue } from "vue"
import { useRoute } from "vuex"
export default defineComponent({
setup() {
const route = useRoute()
watch(route, (to) => {
showExtra.value = !!to.meta?.showExtra
}, {flush: 'pre', immediate: true, deep: true})
},
})
</script>