Page scroll position not reset to top on navigation (regression) in sveltejs kit

Explanation of the problem

A bug was observed while navigating to a new page using the SvelteKit demo project. The current scroll position is maintained and the page does not automatically scroll back to the top when a new page is loaded, if the user is already scrolled partway down the page. This behavior is not present in version next-192, as navigation to a new page in this version always scrolls to the top.

Reproduction Steps:

1. Initialize the SvelteKit demo project.
2. Add the following code in the about.svelte file after the last paragraph:

<p>Go <a href="/">home</a></p>

3. Resize the browser window to a smaller size so that the page scrolls and scroll to the bottom of the page.
4. Click the Home link.
5. Observe that the Home page loads, but does not scroll to the top.

System Information:

• OS: Linux 4.19 Ubuntu 20.04.1 LTS (Focal Fossa)
• CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (64-bit)
• Memory: 7.79 GB / 12.40 GB
• Container: Yes
• Shell: 5.0.17 – /bin/bash
• Node: 14.17.0
• Yarn: 1.22.5
• npm: 8.1.1
• Browsers tested: Chrome (89.0.4389.90) and Firefox on Windows 10
• npm packages:
  • @sveltejs/kit: 1.0.0-next.193
  • svelte: 3.44.1

Severity: Serious but can be worked around.

Logs and additional information: No response.

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Problem solution for Page scroll position not reset to top on navigation (regression) in sveltejs kit

The problem at hand is related to the scroll position of the content in a web page. When a user navigates to a new page, it is expected that the content will be displayed from the top, but in some cases, the content remains scrolled down the page, which can create a confusing user experience. This issue is caused by the fact that the scroll position of the content is not being reset when navigating to a new page.

The solution to this issue is to reset the scroll position of the content through code. One approach is to use the afterNavigate hook, which is a hook provided by the navigation system of the web application. The hook can be added to the layout file, which is responsible for defining the structure and appearance of the web page. The hook will execute whenever a user navigates to a new page and will reset the scroll position of the content by setting its scrollTop property to 0.

Here is an example of how the solution could be implemented using Svelte:

<script>
  import { afterNavigate } from "$app/navigation";
  import Sidebar from "./_sidebar.svelte";

  afterNavigate(() => {
    document.getElementById("main").scrollTop = 0;
  });
</script>

Other popular problems with sveltejs kit

A brief introduction to sveltejs kit

Svelte is a front-end JavaScript framework that is focused on providing a fast and efficient user experience for web applications. Unlike other frameworks, Svelte operates at compile-time, rather than runtime, which results in faster load times and improved performance for the user. By moving the bulk of the processing to the build stage, Svelte avoids the need for virtual DOM manipulation and other performance-intensive operations, resulting in faster and more efficient code.

In addition to its performance benefits, Svelte offers a simple and intuitive syntax for developers. Components in Svelte are written as self-contained units, making it easy to manage the state of the application and maintain modularity. Svelte also provides a rich set of tools for working with reactive data, allowing developers to easily build dynamic and responsive user interfaces. With its focus on simplicity and performance, Svelte is an ideal choice for building fast, lightweight web applications.

Most popular use cases for sveltejs kit

1. Building User Interfaces (UI) for Web Applications: Svelte is a JavaScript framework that can be used to build UIs for web applications. It provides a way to define UI components using a declarative syntax and offers built-in reactivity, which allows for seamless updating of the UI whenever the underlying data changes. This makes it easier to build complex and dynamic UIs, compared to using vanilla JavaScript or other frameworks that require explicit management of the UI state.

<script>
  let name = "John";

  function handleClick() {
    name = "Jane";
  }
</script>

<h1>Hello, {name}!</h1>

<button on:click={handleClick}>
  Change Name
</button>