Vue version

3.2.45

Link to minimal reproduction

https://codesandbox.io/s/musing-tristan-jjobbr?file=/src/views/components/Page2.vue

Steps to reproduce

首次执行1次onMounted 打印,page1 但点击切换到page2, 再点击page1 会发现执行了多次onMounted

What is expected?

希望只执行当前页面的onMounted,只打印一次

What is actually happening?

执行多次onMouted

System Info

No response

Any additional comments?

No response

Thanks for the report, can you provide a minimal reproduction without dependencies on vue-router and vant?

@daisybaicai

改写一下index.vue :3-16 代码 就不会打印l两次

<router-view v-slot="{ Component }">
        <keep-alive v-if="$route.meta.keepAlive">
          <component :is="Component" :key="$route.name" />
        </keep-alive>
        <component :is="Component" v-else :key="$route.name" />
 </router-view>

In your App.vue, it will preserve one Home component instances. So it will mounted twice when you navigate to page1, because the preserved instances will mount Page1 component one time, and the <component :is="Component" v-if="!$route.meta.keepAlive" :key="$route.fullPath" /> will mount another time.

I tried. In this case,will not cache the page, and page1 and page2 will be remounted every time.

@daisybaicai

改写一下index.vue :3-16 代码 就不会打印l两次

<router-view v-slot="{ Component }">
        <keep-alive v-if="$route.meta.keepAlive">
          <component :is="Component" :key="$route.name" />
        </keep-alive>
        <component :is="Component" v-else :key="$route.name" />
 </router-view>

这样写直接就缓存就失效了

@daisybaicai 改写一下index.vue :3-16 代码 就不会打印l两次

<router-view v-slot="{ Component }">
        <keep-alive v-if="$route.meta.keepAlive">
          <component :is="Component" :key="$route.name" />
        </keep-alive>
        <component :is="Component" v-else :key="$route.name" />
 </router-view>

这样写直接就缓存就失效了

那要改的话怎么改？

@daisybaicai 改写一下index.vue :3-16 代码就不会打印l两次

<router-view v-slot="{ Component }">
        <keep-alive v-if="$route.meta.keepAlive">
          <component :is="Component" :key="$route.name" />
        </keep-alive>
        <component :is="Component" v-else :key="$route.name" />
 </router-view>

这样写直接保存就失效了

那要改的话怎么改？

在App.vue中改为

<RouterView />

就好了

我也遇到这种问题了，基本无解，全网都找不到解决办法！

我也遇到这种问题了，基本无解，全网都找不到解决办法！

我上面那个方法试过是可以的