Default Slots for Content Projection
Place a element inside a component to accept arbitrary child content.
Default Slots for Content Projection is a free Sveltejs Academy lesson on CoddyKit. This is lesson 1 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.
What Slots Are
Slots let parent components inject markup into specific places in a child component.
The slot Element
Inside a child, place a <slot /> tag where content should appear.
<!-- Card.svelte -->
<div class="card">
<slot />
</div>Use From Parent
Wrap children inside the component tag. They appear where the slot is.
<Card>
<p>Hello inside the card!</p>
</Card>Composition Power
This pattern lets you build reusable layout shells like cards, modals, and pages.
Multiple Children
Any number of elements can fill the default slot.
<Card>
<h1>Title</h1>
<p>Body</p>
</Card>Plain Strings
You can also pass plain text as the slot content.
<Button>Click me</Button>Conditional Content
Use {#if} inside the parent to choose what to slot in.
Component Slots
Slot content can include other components freely.
<Card>
<Avatar />
<Username />
</Card>Styling
Slotted content keeps the styles of the parent that wrote it, not the child.
Layout vs Logic
Slots are a layout/composition tool, not a data-passing mechanism. Use props for data.
Slot Outlets
You can have multiple slot positions in a component (default + named).
Quick Check
Where does slotted content appear?
Recap
Use <slot /> in a child and pass children between the parent tags to inject content.
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Frequently Asked Questions
Is the “Default Slots for Content Projection” lesson free?
Yes — the full text of “Default Slots for Content Projection” 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 “Default Slots for Content Projection”?
Place a element inside a component to accept arbitrary child content. 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 1 of 4.
How long does the “Default Slots for Content Projection” 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.
All lessons in this course
- Default Slots for Content Projection
- Named Slots with slot="name"
- Slot Fallback Content
- Checking Slot Content with $$slots