如何在 TypeScript 的 Vue Composition API 中反应性地访问当前路由名称？

Question

如何访问当前的路线名称，被动，与Vue的路由器使用Vue公司组成的API在Vue公司3打字稿？

Answer 1

以下是使用Vue 3.0和Vue Router v4.0.0-beta.12和Composition API语法的示例：

<script lang="ts">
import { defineComponent, computed, watch } from 'vue';
import { useRoute } from 'vue-router';

export default defineComponent({
  name: 'MyCoolComponent',
  setup() {
    const route = useRoute();
    
    console.debug(`current route name on component setup init: ${route.name}`);

    // You could use computed property which re-evaluates on route name updates
    // const routeName = computed(() => route.name);

    // You can watch the property for triggering some other action on change
    watch(() => route.name, () => {
      console.debug(`MyCoolComponent - watch route.name changed to ${route.name}`);
      // Do something here...

    // Optionally you can set immediate: true config for the watcher to run on init
    //}, { immediate: true });
    });
    
    return { route };
  },
});
</script>

<template>
  <p>Current route name: {{ route.name }}</p>
</template>

或者通过使用当前实验性的脚本设置语法，SFC Composition API Syntax Sugar，用于Composition API：

<script setup lang="ts">
import { computed, watch } from 'vue';
import { useRoute } from 'vue-router';

export const name = 'MyCoolComponent';

export const route = useRoute();
    
console.debug(`current route name on component setup init: ${route.name}`);

// You could use computed property which re-evaluates on route name updates
//export const routeName = computed(() => route.name);

// You can watch the property for triggering some other action on change
watch(() => route.name, () => {
  console.debug(`MyCoolComponent - watch route.name changed to ${route.name}`);
  // Do something here...

  // Optionally you can set immediate: true config for the watcher to run on init
//}, { immediate: true });
});
</script>

<template>
  <p>Current route name: {{ route.name }}</p>
</template>