react-native-mmkv/lib/createMMKV/createMMKV.js

⚡️ The fastest key/value storage for React Native.

import { Platform } from 'react-native';
import { addMemoryWarningListener } from '../addMemoryWarningListener/addMemoryWarningListener';
import { isTest } from '../isTest';
import { createMockMMKV } from './createMockMMKV';
import { getMMKVFactory, getPlatformContext } from '../getMMKVFactory';
export function createMMKV(configuration) {
    if (isTest()) {
        // In a test environment, we mock the MMKV instance.
        return createMockMMKV(configuration);
    }
    const factory = getMMKVFactory();
    // Pre-parse the config
    let config = configuration ?? { id: factory.defaultMMKVInstanceId };
    if (Platform.OS === 'ios') {
        if (config.path == null) {
            // If the user set an App Group directory in Info.plist, let's use
            // the App Group as a MMKV path:
            const platformContext = getPlatformContext();
            const appGroupDirectory = platformContext.getAppGroupDirectory();
            if (appGroupDirectory != null) {
                config.path = appGroupDirectory;
            }
        }
    }
    // Creates the C++ MMKV HybridObject
    const mmkv = factory.createMMKV(config);
    // Add a hook that trims the storage when we get a memory warning
    addMemoryWarningListener(mmkv);
    return mmkv;
}