Nuxt•4w ago

not rerendering when changing ref value in async watcher

Hello! as you can see in the code I have a ref called "dashboard" which would change upon tap changes and get different results, however it doesn't re-render until I refreshh the page. how to fix it?

message.txt

18 Replies

kapa.ai•4w ago

Hi @Kyoko. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To address the issue of a ref not re-rendering when its value changes in an async watcher, there are a few potential solutions and considerations: 1. Ensure proper reactivity: Make sure you're modifying the ref correctly. When working with refs, you should always use .value to access or modify their values. For example:

dashboard.value = newValue

dashboard.value = newValue

2. Use watchEffect or watch correctly: If you're using a watcher, ensure it's set up properly. Here's an example of how to use watch with a ref:

watch(dashboard, (newValue, oldValue) => {
  // Your logic here
}, { deep: true })

watch(dashboard, (newValue, oldValue) => {
  // Your logic here
}, { deep: true })

The deep: true option ensures that nested changes are also detected Nuxt 3: Avoid losing Reactivity in your Vue Application (https://www.youtube.com/watch?v=sccsXulqMX8). 3. Consider using useAsyncData or useFetch: If you're fetching data asynchronously, Nuxt provides composables like useAsyncData and useFetch that handle reactivity and re-fetching automatically. For example:

const { data: dashboard } = await useAsyncData('dashboard', () => $fetch('/api/dashboard', {
  params: {
    tab: currentTab.value
  }
}), {
  watch: [currentTab]
})

const { data: dashboard } = await useAsyncData('dashboard', () => $fetch('/api/dashboard', {
  params: {
    tab: currentTab.value
  }
}), {
  watch: [currentTab]
})

This setup will automatically re-fetch the data when currentTab changes Docs > Getting-started > Data fetching > Watch (https://nuxt.com/docs/getting-started/data-fetching#watch). 4. Ensure SSR compatibility: If you're using SSR, make sure your state management is SSR-friendly. Nuxt provides useState for creating reactive and SSR-friendly shared state Docs > Getting-started > State Management (https://nuxt.com/docs/getting-started/state-management). 5. Check for reactivity loss: Sometimes, reactivity can be lost when passing data between components or composables. Make sure you're not breaking the reactivity chain Nuxt 3: Avoid losing Reactivity in your Vue Application (https://www.youtube.com/watch?v=sccsXulqMX8). Without seeing your specific code, it's difficult to pinpoint the exact issue. If you're still facing problems after trying these solutions, you might want to create a minimal reproduction of your issue and share it for further assistance. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

<@322468991115198464> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

KyokoOP•4w ago

any help

DesiredName•4w ago

1. what is state, how is it changed inside serviceStore? 2. watch is not deep by default, so if the state is an object or an array, your watch handler won't be triggered

KyokoOP•4w ago

watch is getting triggerd each time and dashboard is changed but its not reflected

kiri•4w ago

What is not reflected @Kyoko Umm if possible can you share a gif ?? Or screenshot?

KyokoOP•4w ago

the dashboard

KyokoOP•4w ago

Using nuxtlink

KyokoOP•4w ago

As you can see second pic its not reflecting dashboard change

KyokoOP•4w ago

When I refresh is working

KyokoOP•4w ago

        <NuxtLink v-for="(item, index) in menuItems" :key="index" :to="item.to" @click="setChangedMenu(item.name)"
          class="text-muted-400 hover:text-muted-500 dark:text-muted-500 dark:hover:text-muted-400 flex items-center justify-center border-b-2 border-transparent p-3 text-center transition-colors duration-300"
          exact-active-class="!border-primary-500 !text-muted-800 dark:!text-muted-100">
          <BaseText size="sm">
            {{ item.name }}
          </BaseText>
        </NuxtLink>

        <NuxtLink v-for="(item, index) in menuItems" :key="index" :to="item.to" @click="setChangedMenu(item.name)"
          class="text-muted-400 hover:text-muted-500 dark:text-muted-500 dark:hover:text-muted-400 flex items-center justify-center border-b-2 border-transparent p-3 text-center transition-colors duration-300"
          exact-active-class="!border-primary-500 !text-muted-800 dark:!text-muted-100">
          <BaseText size="sm">
            {{ item.name }}
          </BaseText>
        </NuxtLink>

nuxtLink @kiri

kiri•4w ago

@Kyoko can you change immediate to true and try ??

KyokoOP•4w ago

same problem Watch is triggered when navigating dashboard is changed but not reflected

kiri•3w ago

Can you do {{ dashboard}} On template and see if it is updating @Kyoko @kapa.ai the dashboard.value is updated ,it's not rendered in the ui untill refresh

kapa.ai•3w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Based on your additional information, it seems the issue is not with updating the ref value itself, but with the UI not reflecting the changes immediately. This could be due to a few reasons: 1. Reactivity loss: Sometimes, reactivity can be lost when passing data between components or when using certain operations. Make sure you're not accidentally breaking the reactivity chain Nuxt 3: Avoid losing Reactivity in your Vue Application (https://www.youtube.com/watch?v=sccsXulqMX8). 2. Computed properties: If you're using computed properties that depend on dashboard.value, ensure they are set up correctly to react to changes. 3. Deep reactivity: If dashboard contains nested objects or arrays, you might need to use deep reactivity. You can force this by creating a new reference:

dashboard.value = { ...dashboard.value, newProperty: newValue }

dashboard.value = { ...dashboard.value, newProperty: newValue }

4. Asynchronous updates: If the update is happening in an asynchronous context, you might need to wrap it in nextTick:

import { nextTick } from 'vue'

// Your update logic
dashboard.value = newValue

nextTick(() => {
  // This will run after the DOM has updated
})

import { nextTick } from 'vue'

// Your update logic
dashboard.value = newValue

nextTick(() => {
  // This will run after the DOM has updated
})

5. Key attribute for v-for: If you're rendering a list based on dashboard, ensure you're using a proper key attribute in your v-for directive. An incorrect key can cause rendering issues Stack Overflow: Nuxt 3/Vue 3 Reactivity issue, while rendering component in v-for loop (https://stackoverflow.com/questions/77337404). 6. Watchers: If you're using watchers, make sure they're set up correctly. For example:

watch(() => dashboard.value, (newValue, oldValue) => {
  // Your logic here
}, { deep: true })

watch(() => dashboard.value, (newValue, oldValue) => {
  // Your logic here
}, { deep: true })

7. Composables: If you're using custom composables, ensure they're returning reactive references correctly. Without seeing your specific implementation, it's challenging to pinpoint the exact cause. If you're still facing issues after trying these solutions, consider creating a minimal reproduction of your problem in a sandbox environment for further assistance. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

<@1077914005206736946> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

kiri•3w ago

@Kyoko please try all the above and see if that fixes it ..😊

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not rerendering when changing ref value in async watcher