How would you build a reusable Svelte validation action?
Tests Svelte action lifecycles versus inline logic. Strong answers describe a node function that attaches input or blur listeners, toggles classes or ARIA directly, returns update and destroy, and cite reusability.
Tests whether you treat Svelte actions as element lifecycles, not component logic. A strong answer describes a function receiving the DOM node and parameters, attaching input or blur listeners, toggling classes or ARIA directly, and returning update and destroy hooks. Advantages: reuse across components, declarative components, co-located DOM effects, and automatic teardown. Red flag: confusing actions with stores, mutating Svelte state instead of the DOM, or omitting cleanup and leaking memory.
Read the original → svelte.dev
- #svelte
- #actions
- #dom
- #validation
- #reusability
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