TypeScript snapshot.retain

Summary: see title Reviewed By: drarmstr Differential Revision: D28489327 fbshipit-source-id: 73949e38084fe01f260f6d8de7c0f19d80a95c55
facebookexperimental · May 18, 2021 · badfabb · badfabb
1 parent f5dae49
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diff --git a/typescript/index.d.ts b/typescript/index.d.ts
@@ -55,6 +55,7 @@ export class Snapshot {
   getInfo_UNSTABLE<T>(recoilValue: RecoilValue<T>): AtomInfo<T>;
   map(cb: (mutableSnapshot: MutableSnapshot) => void): Snapshot;
   asyncMap(cb: (mutableSnapshot: MutableSnapshot) => Promise<void>): Promise<Snapshot>;
+  retain(): () => void;
 }
 
 export class MutableSnapshot extends Snapshot {

diff --git a/typescript/tests.ts b/typescript/tests.ts
@@ -214,6 +214,9 @@ useRecoilCallback(({ snapshot, set, reset, gotoSnapshot }) => async () => {
   set(myAtom, 5);
   set(myAtom, 'hello'); // $ExpectError
   reset(myAtom);
+
+  const release = snapshot.retain();
+  release();
 });
 
 /**