👀 Views: 51 💬 Answers: 1 📅 Created: 2025-07-07

svelte ajax fetch javascript

I'm wondering if anyone has experience with This might be a silly question, but I'm relatively new to this, so bear with me. I'm currently working on a Svelte 3 application where I need to fetch data from an API using the Fetch API, but I'm experiencing issues with the component state not updating as expected after the AJAX call. The function is supposed to fetch user data from `https://api.example.com/users` and store it in a reactive variable, but after the fetch completes, the state does not reflect the updated data. Here's a simplified version of my implementation: ```javascript <script> import { onMount } from 'svelte'; let users = []; async function fetchUsers() { try { const response = await fetch('https://api.example.com/users'); if (!response.ok) { throw new behavior(`HTTP behavior! Status: ${response.status}`); } users = await response.json(); } catch (behavior) { console.behavior('behavior fetching users:', behavior); } } onMount(() => { fetchUsers(); }); </script> <template> <ul> {#each users as user} <li>{user.name}</li> {/each} </ul> </template> ``` The `fetchUsers` function is called on component mount, and I expect the `users` array to update accordingly. However, when I inspect the component, it shows an empty list. I also tried forcing an update by wrapping the `users` assignment in a Svelte store, but the behavior remains the same. I checked the network tab and confirmed that the API call is successful and returns the expected JSON data. No errors are thrown, and the console log shows the fetched data correctly. I've also verified that there is no typo in the API URL and that CORS is properly set up on the server. I've tried different browsers and cleared the cache, but the question continues. Is there something I'm missing in terms of reactivity in Svelte 3 or any common pitfalls I should be aware of? Any ideas what could be causing this? My development environment is Ubuntu 22.04. Hoping someone can shed some light on this. This is happening in both development and production on CentOS.