SOLVING the issue of page flicker in SVELTE

Within the application below, I am experiencing a peculiar page flicker effect that is often associated with AJAX requests. However, in this scenario, the cause is not AJAX-related but rather a conditional statement that triggers the rendering of different versions of the same page.

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An accompanying gif image has been added for you to visually observe the issue at hand.

You can find the code snippet below for reference.

https://i.sstatic.net/jCsPV.gif

<script>
  // Script details go here...
</script>

{#if $showNav || $animateNav}
  <div class="logo-form-container">
    // Content and layout for triggering show/hide logic go here...
  </div>

{:else}
  <div class="logo-form-container">
    // Additional content and layout when conditions are not met
  </div>
{/if}

<style>
 // Style definitions for various UI components
</style>



  [1]: https://i.sstatic.net/FBSym.gif

Answer №1

The issue is not in the code you pasted for Landing.svelte, but rather in App.svelte as observed on the deployed site.

Within the onMount method of App.svelte, there is a call to getAllClients() which returns a Promise. Upon resolution of this Promise, new values are assigned to animateNav and showNav.

To address this, consider implementing a loading variable to conceal all content until necessary asynchronous calls are fully resolved. I have provided a link where the issue was replicated and resolved: here.

The flickering effect may be due to the rapid resolution of the Promise—try using setTimeout to extend the flicker duration.

Answer №2

There are two possible solutions:

  1. Transition the function showNav.set(true) to be placed within the onMount() function (ensuring the navbar is always visible);

Alternatively, you can

  1. Add the following CSS code:

    .navbar { position: absolute; width: 100%; }

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