Based on the provided documentation context, I don't see any specific information about integrating tRPC with Svelte classes. The context provided focuses primarily on Svelte's built-in features like {#await} blocks, onMount, and basic component patterns.

However, I can provide a general explanation of how you might approach this, combining general Svelte knowledge with tRPC concepts:

1. Understanding tRPC in Svelte Context: tRPC is a TypeScript-first RPC framework that lets you call backend functions directly from your frontend. In Svelte, you'd typically use it within components or stores.

2. Basic Pattern: While the documentation doesn't show tRPC specifically, the pattern would be similar to making any async call in Svelte. Here's a basic example:

<script>
  import { trpc } from '$lib/trpc'; // Your tRPC client setup
  import { onMount } from 'svelte';

  let data;
  let error;

  onMount(async () => {
    try {
      // Assuming you have a 'getUser' procedure in your tRPC router
      data = await trpc.user.getUser.query({ userId: 123 });
    } catch (err) {
      error = err;
    }
  });
</script>

{#if error}
  <p>Error: {error.message}</p>
{:else if data}
  <p>User: {data.name}</p>
{:else}
  <p>Loading...</p>
{/if}

3. Using with Classes: If you're using Svelte classes (likely meaning Svelte components), you can follow the same pattern. The key points are:

   • Initialize your tRPC client (usually in a separate file)
   • Use lifecycle functions like onMount for data fetching
   • Handle loading and error states

4. Best Practices:

   • Consider using Svelte stores to manage tRPC state
   • Use Svelte's {#await} blocks for better loading state handling
   • Type your tRPC calls properly for TypeScript support

Since the documentation context doesn't specifically cover tRPC, I recommend checking the official tRPC documentation for Svelte integration details. The general patterns shown in the context for handling async operations (like the {#await} blocks) would apply similarly to tRPC calls.

If you need more specific guidance on tRPC setup or advanced patterns, I'd need to see the relevant documentation context about tRPC integration with Svelte.