fix: remove warning about multiMerge not being implemented (#827)

src/AsyncStorage.native.ts

@@ -118,8 +118,6 @@ const AsyncStorage = ((): AsyncStorageStatic => {
      * Merges an existing `key` value with an input value, assuming both values
      * are stringified JSON.
      *
-     * **NOTE:** This is not supported by all native implementations.
-     *
      * See https://react-native-async-storage.github.io/async-storage/docs/api#mergeitem
      */
     mergeItem: (key, value, callback) => {
@@ -337,8 +335,6 @@ const AsyncStorage = ((): AsyncStorageStatic => {
      * Batch operation to merge in existing and new values for a given set of
      * keys. This assumes that the values are stringified JSON.
      *
-     * **NOTE**: This is not supported by all native implementations.
-     *
      * See https://react-native-async-storage.github.io/async-storage/docs/api#multimerge
      */
     multiMerge: (keyValuePairs, callback) => {
@@ -357,10 +353,4 @@ const AsyncStorage = ((): AsyncStorageStatic => {
   };
 })();
 
-// Not all native implementations support merge.
-if (!RCTAsyncStorage.multiMerge) {
-  delete AsyncStorage.mergeItem;
-  delete AsyncStorage.multiMerge;
-}
-
 export default AsyncStorage;

src/AsyncStorage.ts

@@ -163,10 +163,8 @@ const AsyncStorage: AsyncStorageStatic = {
    *   multiMerge([['k1', 'val1'], ['k2', 'val2']])
    */
   multiMerge: (keyValuePairs, callback) => {
-    const promises = keyValuePairs.map(
-      (item) =>
-        AsyncStorage.mergeItem?.(item[0], item[1]) ??
-        Promise.reject('Not implemented')
+    const promises = keyValuePairs.map((item) =>
+      AsyncStorage.mergeItem(item[0], item[1])
     );
     return createPromiseAll(promises, callback);
   },

src/hooks.ts

@@ -5,9 +5,7 @@ export function useAsyncStorage(key: string): AsyncStorageHook {
   return {
     getItem: (...args) => AsyncStorage.getItem(key, ...args),
     setItem: (...args) => AsyncStorage.setItem(key, ...args),
-    mergeItem: (...args) =>
-      AsyncStorage.mergeItem?.(key, ...args) ??
-      Promise.reject('Not implemented'),
+    mergeItem: (...args) => AsyncStorage.mergeItem(key, ...args),
     removeItem: (...args) => AsyncStorage.removeItem(key, ...args),
   };
 }

src/types.ts

@@ -70,15 +70,9 @@ export type AsyncStorageStatic = {
    * Merges an existing `key` value with an input value, assuming both values
    * are stringified JSON.
    *
-   * **NOTE:** This is not supported by all native implementations.
-   *
    * See https://react-native-async-storage.github.io/async-storage/docs/api#mergeitem
    */
-  mergeItem?: (
-    key: string,
-    value: string,
-    callback?: Callback
-  ) => Promise<void>;
+  mergeItem: (key: string, value: string, callback?: Callback) => Promise<void>;
 
   /**
    * Erases *all* `AsyncStorage` for all clients, libraries, etc. You probably
@@ -152,11 +146,9 @@ export type AsyncStorageStatic = {
    * Batch operation to merge in existing and new values for a given set of
    * keys. This assumes that the values are stringified JSON.
    *
-   * **NOTE**: This is not supported by all native implementations.
-   *
    * See https://react-native-async-storage.github.io/async-storage/docs/api#multimerge
    */
-  multiMerge?: (
+  multiMerge: (
     keyValuePairs: [string, string][],
     callback?: MultiCallback
   ) => Promise<void>;

website/docs/API.md

@@ -30,7 +30,6 @@ static getItem(key: string, [callback]: ?(error: ?Error, result: ?string) => voi
 **Example**:
 
 ```js
-
 getMyStringValue = async () => {
   try {
     return await AsyncStorage.getItem('@key')
@@ -39,12 +38,10 @@ getMyStringValue = async () => {
   }
 
   console.log('Done.')
-
 }
 ```
 
 ```js
-
 getMyObject = async () => {
   try {
     const jsonValue = await AsyncStorage.getItem('@key')
@@ -54,7 +51,6 @@ getMyObject = async () => {
   }
 
   console.log('Done.')
-
 }
 ```
 
@@ -66,7 +62,7 @@ getMyObject = async () => {
 
 ## `setItem`
 
-Sets a string `value` for given `key`. This operation can either modify an existing entry, if it did exist for given `key`, or add new one otherwise. 
+Sets a string `value` for given `key`. This operation can either modify an existing entry, if it did exist for given `key`, or add new one otherwise.
 
 In order to store object value, you need to serialize it, e.g. using `JSON.stringify()`.
 
@@ -87,7 +83,6 @@ static setItem(key: string, value: string, [callback]: ?(error: ?Error) => void)
 **Example**:
 
 ```js
-
 setStringValue = async (value) => {
   try {
     await AsyncStorage.setItem('key', value)
@@ -100,7 +95,6 @@ setStringValue = async (value) => {
 ```
 
 ```js
-
 setObjectValue = async (value) => {
   try {
     const jsonValue = JSON.stringify(value)
@@ -121,7 +115,6 @@ setObjectValue = async (value) => {
 ## `mergeItem`
 
 Merges an existing value stored under `key`, with new `value`, assuming both values are **stringified JSON**.
-**NOTE**: This is not supported by all native implementations.
 
 **Signature**:
 
@@ -180,7 +173,6 @@ mergeUsers = async () => {
     // }
   }
 }
-
 ```
 
 <br />
@@ -242,7 +234,6 @@ static getAllKeys([callback]: ?(error: ?Error, keys: ?Array<string>) => void): P
 **Example**:
 
 ```js
-
 getAllKeys = async () => {
   let keys = []
   try {
@@ -255,7 +246,6 @@ getAllKeys = async () => {
   // example console.log result:
   // ['@MyApp_user', '@MyApp_key']
 }
-
 ```
 
 <br />
@@ -281,7 +271,6 @@ static multiGet(keys: Array<string>, [callback]: ?(errors: ?Array<Error>, result
 **Example**:
 
 ```js
-
 getMultiple = async () => {
 
   let values
@@ -295,7 +284,6 @@ getMultiple = async () => {
   // example console.log output:
   // [ ['@MyApp_user', 'myUserValue'], ['@MyApp_key', 'myKeyValue'] ]
 }
-
 ```
 
 <br />
@@ -321,7 +309,6 @@ static multiSet(keyValuePairs: Array<Array<string>>, [callback]: ?(errors: ?Arra
 **Example**:
 
 ```js
-
 multiSet = async () => {
   const firstPair = ["@MyApp_user", "value_1"]
   const secondPair = ["@MyApp_key", "value_2"]
@@ -333,7 +320,6 @@ multiSet = async () => {
 
   console.log("Done.")
 }
-
 ```
 
 <br />
@@ -344,7 +330,6 @@ multiSet = async () => {
 ## `multiMerge`
 
 Multiple merging of existing and new values in a batch. Assumes that values are *stringified JSON*. Once completed, invokes `callback` with errors (if any).
-**NOTE**: This is not supported by all native implementations.
 
 **Signature**:
 
@@ -430,7 +415,6 @@ mergeMultiple = async () => {
   //   ]
   // ]
 }
-
 ```
 
 
@@ -501,7 +485,6 @@ clearAll = async () => {
 
   console.log('Done.')
 }
-
 ```
 
 <!-- ------------------------ HOOKS ------------------------ -->