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0.2.0 #5

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Thilawyn merged 59 commits from next into master 2026-05-30 06:10:54 +02:00
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packages/effect-lens/README.md
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@@ -28,7 +28,7 @@ Lens<
A, // Type of the value the lens is focused on A, // Type of the value the lens is focused on
ER, // Errors that can happen when reading ER, // Errors that can happen when reading
EW, // Errors that can happen when writing EW, // Errors that can happen when writing
RE, // Requirements for reading RR, // Requirements for reading
RW // Requirements for writing RW // Requirements for writing
> >
``` ```
@@ -55,11 +55,16 @@ yield* Lens.update(lens, Array.replace(1, 1664))
Currently available: Currently available:
- `fromSubscriptionRef` - `fromSubscriptionRef`
- `fromSynchronizedRef` (note: since `SynchronizedRef` is not reactive (does not produce a stream of value changes), the resulting Lens' `changes` stream will only emit the current value of the lens when evaluated, and nothing else) - `fromSynchronizedRef` (note: since `SynchronizedRef` is not reactive (does not produce a stream of value changes), the resulting Lens' `changes` stream will only emit the current value of the lens when evaluated, and nothing else)
- `fromRef` (returns an effect because it creates an internal lock)
More to come! More to come!
#### Manually #### Manually
You can also create Lenses manually using `make` by providing a getter, a stream of changes and either a `set` or `modify` function depending on your needs. You can also create Lenses manually using `make` by providing:
- `get`: an effect that reads the current value,
- `changes`: a stream of value changes,
- `commit`: an effectful write primitive,
- `lock`: an effect that produces the lock used to serialize writes.
You can get pretty creative! Here's an example of a Lens that points to a specific key of the browser `LocalStorage`: You can get pretty creative! Here's an example of a Lens that points to a specific key of the browser `LocalStorage`:
```typescript ```typescript
@@ -83,9 +88,11 @@ const lens = Effect.all([
Stream.unwrap, Stream.unwrap,
), ),
set: a => Option.isSome(a) commit: a => Option.isSome(a)
? kv.set(key, a.value) ? kv.set(key, a.value)
: kv.remove(key), : kv.remove(key),
lock: Effect.succeed(effect => effect),
})), })),
Effect.provide(BrowserKeyValueStore.layerLocalStorage), Effect.provide(BrowserKeyValueStore.layerLocalStorage),