Function tryGetWebStore

dash/dash-renderer/src/persistence.js:222–255

(backEnd, dispatch)

};

function tryGetWebStore(backEnd, dispatch) {
    const store = new WebStore(backEnd);
    const fallbackStore = stores.memory;
    const storeTest = longString();
    const testKey = storePrefix + 'x.x';
    try {
        store._setItem(testKey, storeTest);
        if (store.getItem(testKey) !== storeTest) {
            dispatch(
                err(`${backEnd} init failed set/get, falling back to memory`)
            );
            return fallbackStore;
        }
        store.removeItem(testKey);
        return store;
    } catch (e) {
        dispatch(
            err(`${backEnd} init first try failed; clearing and retrying`)
        );
    }
    try {
        store.clear();
        store._setItem(testKey, storeTest);
        if (store.getItem(testKey) !== storeTest) {
            throw new Error('nope');
        }
        store.removeItem(testKey);
        dispatch(err(`${backEnd} init set/get succeeded after clearing!`));
        return store;
    } catch (e) {
        dispatch(err(`${backEnd} init still failed, falling back to memory`));
        return fallbackStore;
    }
}

function getStore(type, dispatch) {
    if (!stores[type]) {