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add a compat enabled date for fetchIterableTypeSupport #6006

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Merged
vicb merged 5 commits into from
Feb 4, 2026
+9 −3
Merged

add a compat enabled date for fetchIterableTypeSupport #6006

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dc70531
add a compat enabled date for fetchIterableTypeSupport
vicb Feb 3, 2026
08e9953
fix format
vicb Feb 3, 2026
0fd72bb
update types
vicb Feb 3, 2026
64d1b84
Apply suggestion from @vicb
vicb Feb 4, 2026
e3b80b9
Merge branch 'main' into vicb/fetchIterableTypeSupport
vicb Feb 4, 2026
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4 changes: 3 additions & 1 deletion src/workerd/io/compatibility-date.capnp
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Expand Up @@ -1229,7 +1229,8 @@ struct CompatibilityFlags @0x8f8c1b68151b6cef {

fetchIterableTypeSupport @146 :Bool
$compatEnableFlag("fetch_iterable_type_support")
$compatDisableFlag("no_fetch_iterable_type_support");
$compatDisableFlag("no_fetch_iterable_type_support")
$compatEnableDate("2026-02-19");
# Enables passing sync and async iterables as the body of fetch Request or Response.
# Previously, sync iterables like Arrays would be accepted but stringified, and async
# iterables would be treated as regular objects and not iterated over at all. With this
Expand All @@ -1239,6 +1240,7 @@ struct CompatibilityFlags @0x8f8c1b68151b6cef {
# that allows this behavior and allows sync Generator and AsyncGenerator objects to be
# included in kj::OneOf declarations safely with strings and other types. When enabled,
# strings are ignored but Arrays will be treated as iterables and not stringified as before.
# Also see fetchIterableTypeSupportOverrideAdjustment.

envModuleNullableSupport @147 :Bool
$compatEnableFlag("env_module_nullable_support")
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4 changes: 3 additions & 1 deletion types/generated-snapshot/latest/index.d.ts
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Expand Up @@ -1913,7 +1913,9 @@ type BodyInit =
| ArrayBufferView
| Blob
| URLSearchParams
| FormData;
| FormData
| Iterable<ArrayBuffer | ArrayBufferView>
| AsyncIterable<ArrayBuffer | ArrayBufferView>;
declare abstract class Body {
/* [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/body) */
get body(): ReadableStream | null;
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4 changes: 3 additions & 1 deletion types/generated-snapshot/latest/index.ts
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Expand Up @@ -1918,7 +1918,9 @@ export type BodyInit =
| ArrayBufferView
| Blob
| URLSearchParams
| FormData;
| FormData
| Iterable<ArrayBuffer | ArrayBufferView>
| AsyncIterable<ArrayBuffer | ArrayBufferView>;
export declare abstract class Body {
/* [MDN Reference](https://developer.mozilla.org/docs/Web/API/Request/body) */
get body(): ReadableStream | null;
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