1# Scope
2
3## `Scope.extend` → `Scope.provide`
4
5`Scope.extend` has been renamed to `Scope.provide` in v4. The behavior is
6identical: it provides a `Scope` to an effect that requires one, removing
7`Scope` from the effect's requirements without closing the scope when the
8effect completes.
9
10The new name better reflects the operation — you are providing a service (the
11`Scope`) to an effect, consistent with how other services are provided in
12Effect.
13
14**v3**
15
17import { Effect, Scope } from "effect"
18
19const program = Effect.gen(function*() {
20 const scope = yield* Scope.make()
21 yield* Scope.extend(myEffect, scope)
22})
24
25**v4**
26
28import { Effect, Scope } from "effect"
29
30const program = Effect.gen(function*() {
31 const scope = yield* Scope.make()
32 yield* Scope.provide(scope)(myEffect)
33})
35
36Both data-first and data-last (curried) forms are supported:
37
39// data-first
40Scope.provide(myEffect, scope)
41
42// data-last (curried)
43myEffect.pipe(Scope.provide(scope))
45
46## Quick Reference
47
48| v3 | v4 |
49| -------------- | --------------- |
50| `Scope.extend` | `Scope.provide` |