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# Effect FC
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Welcome to **Effect FC** – a powerful integration of [Effect-TS](https://effect.website/) with React 19.2+ that enables you to write function components using Effect generators.
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Welcome to **Effect FC** (as in: Effect **F**unction **C**omponent) – a powerful integration of [Effect](https://effect.website/) with React 19.2+ that enables you to write React function components using Effect generators.
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## What is Effect FC?
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@@ -12,37 +12,36 @@ Effect FC allows you to harness the full power of Effect-TS within your React co
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### Key Features
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- **Effect-TS Integration**: Write components using Effect generators for powerful, composable effects
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- **Effect Integration**: Write your function component logic using Effect.
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- **Type Safety**: Full TypeScript support with Effect's comprehensive type system
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- **Resource Management**: Automatic cleanup and finalization of resources
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- **Dependency Injection**: Built-in support for providing dependencies to components
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- **React 19.2+ Compatible**: Leverages the latest React features
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- **Dependency Injection**: Built-in support for providing dependencies to components using Effect services.
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- **Resource Management**: Automatic cleanup and finalization of component resources using the `Scope` API.
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## Quick Example
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Here's what writing an Effect FC component looks like:
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```typescript
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export class Todos extends Component.make("Todos")(function*() {
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export class TodosView extends Component.make("TodosView")(function*() {
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const state = yield* TodosState
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const [todos] = yield* useSubscribables(state.ref)
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const [todos] = yield* Component.useSubscribables([state.subscriptionRef])
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yield* useOnMount(() => Effect.andThen(
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yield* Component.useOnMount(() => Effect.andThen(
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Console.log("Todos mounted"),
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Effect.addFinalizer(() => Console.log("Todos unmounted")),
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))
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const TodoFC = yield* Todo
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const Todo = yield* TodoView.use
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return (
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<Container>
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<Heading align="center">Todos</Heading>
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<Flex direction="column" align="stretch" gap="2" mt="2">
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<TodoFC _tag="new" />
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<Todo _tag="new" />
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{Chunk.map(todos, todo =>
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<TodoFC key={todo.id} _tag="edit" id={todo.id} />
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<Todo key={todo.id} _tag="edit" id={todo.id} />
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)}
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</Flex>
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</Container>
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