Jon Staab
18 lines
752 B
Markdown
18 lines
752 B
Markdown
# @welshman/store [](https://npmjs.com/package/@welshman/store)
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Utilities for dealing with svelte stores when using welshman.
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```typescript
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import {Repository, NAMED_PEOPLE, NAMED_TOPICS, type TrustedEvent, readUserList, List} from '@welshman/util'
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import {deriveEventsMapped} from '@welshman/store'
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const repository = new Repository()
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// Create a svelte store that performantly maps matching events in the repository to List objects
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const lists = deriveEventsMapped<PublishedUserList>(repository, {
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filters: [{kinds: [NAMED_PEOPLE, NAMED_TOPICS]}],
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eventToItem: (event: TrustedEvent) => (event.tags.length > 1 ? readUserList(event) : null),
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itemToEvent: (list: List) => list.event,
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})
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```
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