Nuxt•4w ago

Template within conditional appeared briefly

How to fix template within conditional appeared briefly before finally disappearing when the page was first rendered. - Template Code

              <!-- For Regular Login -->
              <div class="text-center" v-if="stateScan == false">
                <FormKit
                  type="submit"
                  label="Login"
                />
              </div>

              <!-- For Regular Login -->
              <div class="text-center" v-if="stateScan == false">
                <FormKit
                  type="submit"
                  label="Login"
                />
              </div>

- Script Code

let stateScan = ref(false);

const toggleScan = async () => {
  isProcessing.value = true;
  if (stateScan.value) {
    stopFaceDetection()
    stopVideoFeed()
    stateScan.value = false
  } else {
    await startVideoFeed()
    brightnessCheckInterval = setInterval(checkBrightness, 1000);
    await startFaceDetection()
    stateScan.value = true
  }
  isProcessing.value = false;
}

let stateScan = ref(false);

const toggleScan = async () => {
  isProcessing.value = true;
  if (stateScan.value) {
    stopFaceDetection()
    stopVideoFeed()
    stateScan.value = false
  } else {
    await startVideoFeed()
    brightnessCheckInterval = setInterval(checkBrightness, 1000);
    await startFaceDetection()
    stateScan.value = true
  }
  isProcessing.value = false;
}

2 Replies

kapa.ai•4w ago

Hi @Adnan Erlansyah. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- This issue you're experiencing is related to hydration mismatch in Nuxt, which can occur when the server-side rendered content doesn't match the client-side rendered content. Let's look at how we can address this problem. The brief appearance of the template before disappearing is likely due to the initial server-side rendering showing the content, and then the client-side JavaScript taking over and hiding it based on the stateScan value. Here are a few approaches to fix this: 1. Use client-side rendering for this component: You can wrap the conditional content in a <ClientOnly> component to ensure it only renders on the client side:

   <ClientOnly>
     <div class="text-center" v-if="stateScan == false">
       <FormKit
         type="submit"
         label="Login"
       />
     </div>
   </ClientOnly>

   <ClientOnly>
     <div class="text-center" v-if="stateScan == false">
       <FormKit
         type="submit"
         label="Login"
       />
     </div>
   </ClientOnly>

This approach is mentioned in the Nuxt documentation on client-side rendering (https://nuxt.com/docs/guide/concepts/rendering#client-side-rendering). 2. Use v-show instead of v-if: If the content doesn't need to be completely removed from the DOM, you can use v-show:

   <div class="text-center" v-show="!stateScan">
     <FormKit
       type="submit"
       label="Login"
     />
   </div>

   <div class="text-center" v-show="!stateScan">
     <FormKit
       type="submit"
       label="Login"
     />
   </div>

This will keep the element in the DOM but hide it with CSS, which can prevent the flash of content. 3. Initialize stateScan with useState: If you need to maintain the state across server and client, you can use useState:

   const stateScan = useState('stateScan', () => false)

   const stateScan = useState('stateScan', () => false)

This ensures that the state is consistent between server and client rendering. 4. Use a loading state: You can introduce a loading state to prevent rendering until the initial state is determined:

   <template>
     <div v-if="!isLoading">
       <div class="text-center" v-if="!stateScan">
         <FormKit
           type="submit"
           label="Login"
         />
       </div>
     </div>
   </template>

   <script setup>
   const isLoading = ref(true)
   const stateScan = ref(false)

   onMounted(() => {
     // Perform any necessary initialization here
     isLoading.value = false
   })
   </script>

   <template>
     <div v-if="!isLoading">
       <div class="text-center" v-if="!stateScan">
         <FormKit
           type="submit"
           label="Login"
         />
       </div>
     </div>
   </template>

   <script setup>
   const isLoading = ref(true)
   const stateScan = ref(false)

   onMounted(() => {
     // Perform any necessary initialization here
     isLoading.value = false
   })
   </script>

This approach is similar to the one described in the Stack Overflow post about handling hydration mismatches (https://stackoverflow.com/questions/77590022). By implementing one of these solutions, you should be able to prevent the brief appearance of the conditional content during initial rendering. Choose the approach that best fits your specific use case and overall application architecture. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

<@1079709612078534676> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Template within conditional appeared briefly