QuotaExceededError: Dom exception 22: An attempt was made to add something to storage that exceeded the quota

Question

Using LocalStorage on iPhone with iOS 7 throws this error. I\'ve been looking around for a resolvant, but considering I\'m not even browsing in private, nothing is relevant.

Answer 1

Here is an expanded solution based on DrewT's answer above that uses cookies if localStorage is not available. It uses Mozilla's docCookies library:

function localStorageGet( pKey ) {
    if( localStorageSupported() ) {
        return localStorage[pKey];
    } else {
        return docCookies.getItem( 'localstorage.'+pKey );
    }
}

function localStorageSet( pKey, pValue ) {
    if( localStorageSupported() ) {
        localStorage[pKey] = pValue;
    } else {
        docCookies.setItem( 'localstorage.'+pKey, pValue );
    }
}

// global to cache value
var gStorageSupported = undefined;
function localStorageSupported() {
    var testKey = 'test', storage = window.sessionStorage;
    if( gStorageSupported === undefined ) {
        try {
            storage.setItem(testKey, '1');
            storage.removeItem(testKey);
            gStorageSupported = true;
        } catch (error) {
            gStorageSupported = false;
        }
    }
    return gStorageSupported;
}

In your source, just use:

localStorageSet( 'foobar', 'yes' );
...
var foo = localStorageGet( 'foobar' );
...