Sveltejs Academy · Lesson

Layout Files: +layout.svelte

Share navigation and shell UI across multiple pages with layout components.

Lesson 4 of 413 steps

Layout Files: +layout.svelte is a free Sveltejs Academy lesson on CoddyKit. This is lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Sveltejs Academy learning path, and your progress syncs across the web and the CoddyKit app. The Sveltejs Academy course includes 4 lessons in total.

Layouts Wrap Pages

A +layout.svelte file wraps all pages in the same folder and its subfolders.

Root Layout

src/routes/+layout.svelte wraps every page in the app. Common place for nav and shell.

<!-- +layout.svelte -->
<nav>...</nav>
<main>
  <slot />
</main>

The slot

The current page is injected where <slot /> appears.

Nested Layouts

Add +layout.svelte in any subfolder for section-specific layouts.

src/routes/admin/+layout.svelte  // wraps all /admin/* pages

Layout Inheritance

Pages inherit all parent layouts from root down. Stack them for shared UI.

Layout Data Loading

Pair with +layout.js to load data needed in the layout.

Conditional UI

Layouts can read $page to adjust based on the current URL.

Reset Layout

Use +page@ notation to break out of a layout for a specific page.

Layout Groups

Use folders like (marketing) for layouts that do not add URL segments.

Error Pages

Place +error.svelte in any layout folder to catch errors for that section.

Reusing Layouts

Layouts make consistent UI easy. No prop drilling required.

Quick Check

Where does the page render inside a layout?

Answer it in the interactive lesson

Recap

Layouts wrap pages via +layout.svelte with a <slot />. They nest by folder depth.

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Frequently Asked Questions

Is the “Layout Files: +layout.svelte” lesson free?

Yes — the full text of “Layout Files: +layout.svelte” is free to read here on the web. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Sveltejs Academy course, upgrade to CoddyKit PRO. The Sveltejs Academy course includes 4 lessons in total.

What will I learn in “Layout Files: +layout.svelte”?

Share navigation and shell UI across multiple pages with layout components. You practise Sveltejs Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Sveltejs Academy?

No prior experience is required. Sveltejs Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 4 of 4.

How long does the “Layout Files: +layout.svelte” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Sveltejs Academy lesson?

Yes. Every Sveltejs Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

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