Move makeUniqueId from QueryManager.ts into @apollo/client/utilities.

src/__tests__/__snapshots__/exports.ts.snap

@@ -352,6 +352,7 @@ Array [
   "isReference",
   "iterateObserversSafely",
   "makeReference",
+  "makeUniqueId",
   "maybeDeepFreeze",
   "mergeDeep",
   "mergeDeepArray",

src/core/QueryManager.ts

@@ -19,6 +19,7 @@ import {
   isNonEmptyArray,
   Concast,
   ConcastSourcesIterable,
+  makeUniqueId,
 } from '../utilities';
 import { ApolloError, isApolloError } from '../errors';
 import {
@@ -1414,10 +1415,3 @@ function getQueryIdsForQueryDescriptor<TStore>(
   }
   return queryIds;
 }
-
-const prefixCounts: Record<string, number> = Object.create(null);
-function makeUniqueId(prefix: string) {
-  const count = prefixCounts[prefix] || 1;
-  prefixCounts[prefix] = count + 1;
-  return `${prefix}:${count}:${Math.random().toString(36).slice(2)}`;
-}

src/utilities/common/makeUniqueId.ts

@@ -0,0 +1,9 @@
+const prefixCounts = new Map<string, number>();
+
+// These IDs won't be globally unique, but they will be unique within this
+// process, thanks to the counter, and unguessable thanks to the random suffix.
+export function makeUniqueId(prefix: string) {
+  const count = prefixCounts.get(prefix) || 1;
+  prefixCounts.set(prefix, count + 1);
+  return `${prefix}:${count}:${Math.random().toString(36).slice(2)}`;
+}

src/utilities/index.ts

@@ -86,5 +86,6 @@ export * from './common/arrays';
 export * from './common/errorHandling';
 export * from './common/canUse';
 export * from './common/compact';
+export * from './common/makeUniqueId';
 
 export * from './types/IsStrictlyAny';