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Svelte · 10 Changing Row Presentation with Snippets
Series contents · Technology map
Stage: Component Contracts and Effects · External example · preview instructions · Storage ID: svelte-step-10
Goals and learning outcomes
- The card id order is the same in both presentations.
- Only the detailed presentation adds a completion description.
Prerequisites
Unit 10 continues with the work and experiment records from Unit 9.
Key concepts and explanations
snippet
A snippet defines a reusable markup fragment. It receives data through parameters and is displayed with {@render}.
Composition Boundary
Separating list calculations from row presentation lets you show the same data in different forms. Keep presentation fragments from changing the original data.
Practice setup
First check the execution scope guidance on the example screen. The following environment is for extending the assignment in a separate project. Compile and run .svelte files in a separate Svelte 5 Vite project. Record package versions and the lockfile. Frontory’s Svelte preview uses actual writable stores and an explicit DOM adapter; it is not a .svelte compiler or a runes runner.
The linked example is a starting point. It does not implement every task below. Complete work beyond its supported scope in a separate project.
Practice tasks
- In src/CardList.svelte, create a structure that accepts a row snippet prop.
- Define compact and detailed snippets in the parent.
- Apply both snippets to the same filter results, and check that ids and counts agree.
Variables to observe
| Variable | Baseline | Change | Expected change / hypothesis |
|---|---|---|---|
| Row Presentation | compact | detailed | The card count and order stay the same; only the displayed information changes. |
Predictions in this table are not measured results. Change one condition at a time and record why the actual result differs.
Completion criteria
- The card id order is the same in both presentations.
- Only the detailed presentation adds a completion description.
Self-check
- How do the values returned by a snippet and an ordinary function differ?
- Why pass responsibility for row presentation to the parent?
Official references
Linked example and execution scope
Example source · Runtime environments and limits
The preview is a Svelte writable/DOM contract experiment. To run runes, snippets, and compiled output, run the actual App.svelte in a Svelte 5 project.
Source code and records are not overwritten automatically. Resetting an existing example also preserves your notes.
Next learning
Previous: $bindable and the Editor Contract · Next: DOM References and tick