How to Dynamically Change Layout in SvelteKit Using Button Clicks

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How to Dynamically Change Layout in SvelteKit Using Button Clicks

When building applications with SvelteKit, you might encounter the need to manage state or properties that affect your entire layout. One common scenario is wanting to change a theme (e.g., light or dark) in response to a user's action, like clicking a button. If you've ever tried to implement this and faced issues, you're not alone.

The Problem

Consider the following setup:

However, you find that although the console logs show the toggle function is triggered, the UI does not reflect the changes. This is likely due to the way SvelteKit loads data for layouts and pages separately, thereby preventing dynamic updates.

The Solution

To solve this issue, we'll use Svelte's context API combined with writable stores. This approach allows us to share a reactive store between your layout and page components without duplicate data or function calls.

Step 1: Set Up the Writable Store in the Layout

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Access the Theme Store in the Page

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Implement a Toggle Function (Optional)

If you want to allow the user to toggle between themes, you can also pass a function to the context instead of directly modifying the store's value.

In your layout:

[[See Video to Reveal this Text or Code Snippet]]

And in your page:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By leveraging the context API and writable stores, we can effectively manage layout properties like themes in SvelteKit applications. This approach ensures that the state is maintained and changes are reflected in both the layout and the page seamlessly.

Now, whenever the button is clicked, your layout will update accordingly, showcasing a responsive UI that aligns with user interactions.

Try implementing this solution in your own SvelteKit project and see how effortlessly you can manage layout properties dynamically!