Explore Library
React NativeData Persistence & Local Storage

73 items

1

AsyncStorage APIs Are Asynchronous

Code Quiz
2

Persisting State on Change

Code Quiz
3

Secure Storage with Keychain & Keystore

Slides / Video
4

Realm and WatermelonDB Databases

Slides / Video
5

SQLite for Relational Local Databases

Slides / Video
6

AsyncStorage Is Unencrypted

Quiz
7

Storing User Preferences

Quiz
8

Offline Storage and Sync

Quiz
9

Clearing Data on Logout

Quiz
10

AsyncStorage Basic API

Quiz
11

Storing Objects in AsyncStorage

Quiz
12

Async/Await and Errors

Quiz
13

Batch Operations

Quiz
14

Clearing and Listing Keys

Quiz
15

Choosing a Storage Solution

Quiz
16

MMKV Key-Value Storage

Quiz
17

SQLite for Relational Data

Quiz
18

Secure Storage for Secrets

Quiz
19

AsyncStorage Performance Limits

Quiz
20

Rehydrating on App Startup

Quiz
21

Handling Data Migrations

Quiz
22

Debouncing Persistence Writes

Quiz
23

MMKV for Fast Synchronous Storage

Slides / Video
24

AsyncStorage Limitations Explained

Slides / Video
25

AsyncStorage Is Promise-Based

Slides / Video
26

AsyncStorage Batch Operations

Slides / Video
27

Removing and Clearing AsyncStorage Data

Slides / Video
28

Serializing Objects for Storage

Slides / Video
29

Storing and Retrieving Data with AsyncStorage

Slides / Video
30

AsyncStorage for Key-Value Storage

Slides / Video
31

Storing Files with FileSystem

Slides / Video
32

SecureStore for Sensitive Tokens

Code Quiz
33

MMKV Synchronous Reads

Code Quiz
34

Custom AsyncStorage Hook

Code Quiz
35

SQLite Query Placeholders

Code Quiz
36

Migrating Persisted Schema

Code Quiz
37

Cache Expiry Check

Code Quiz
38

Wiping Storage with clear

Code Quiz
39

Enumerating Keys with getAllKeys

Code Quiz
40

Batch Writes with multiSet

Code Quiz
41

Partial Updates with mergeItem

Code Quiz
42

Loading State on Mount

Code Quiz
43

Catching AsyncStorage Errors

Code Quiz
44

Importing AsyncStorage Correctly

Code Quiz
45

Versioning Your Stored Data Schemas

Slides / Video
46

Serializing Objects Before Storage

Code Quiz
47

Persisting Data with setItem

Code Quiz
48

Reading Data with getItem

Code Quiz
49

Deleting Keys with removeItem

Code Quiz
50

Parsing Stored Strings on Retrieval

Code Quiz
51

getItem Returns null for Missing Keys

Code Quiz
52

AsyncStorage Stores Only Strings

Code Quiz
53

Caching Fetched Data for Offline Access

Slides / Video
54

Handling Storage Errors Gracefully

Slides / Video
55

Building a Storage Wrapper

Slides / Video
56

Realm and WatermelonDB

Flashcard
57

MMKV High-Performance Storage

Flashcard
58

File System Persistence

Flashcard
59

Typed Storage Abstraction Layer

Flashcard
60

Choosing a Persistence Solution

Flashcard
61

Size Limits and Performance

Flashcard
62

Schema Migration and Versioning

Flashcard
63

Clearing Storage and Listing Keys

Flashcard
64

AsyncStorage Basic API

Flashcard
65

AsyncStorage Stores Strings Only

Flashcard
66

Batch Operations

Flashcard
67

Async and Unencrypted

Flashcard
68

Community AsyncStorage Package

Flashcard
69

Secure Storage for Secrets

Flashcard
70

SQLite for Relational Data

Flashcard
71

Handling Read/Write Errors

Flashcard
72

Choosing the Right Storage Solution

Slides / Video
73

Expo SecureStore for Sensitive Data

Slides / Video
Code QuizIntermediate

Catching AsyncStorage Errors

See why this try/catch never actually catches the failure.

Codejavascript
const loadToken = async () => {
  try {
    const token = AsyncStorage.getItem('token');
    console.log(token);
  } catch (e) {
    console.error('Failed:', e);
  }
};

What is the bug in this code?