eruda/eustia/safeStorage.js

/* Safe localStorage and sessionStorage.
 */

_('isUndef memStorage');

function exports(type, memReplacement) {
    if (isUndef(memReplacement)) memReplacement = true;

    var ret;

    switch (type) {
        case 'local':
            ret = window.localStorage;
            break;
        case 'session':
            ret = window.sessionStorage;
            break;
    }

    try {
        // Safari private browsing
        var x = 'test-localStorage-' + Date.now();
        ret.setItem(x, x);
        var y = ret.getItem(x);
        ret.removeItem(x);
        if (y !== x) throw new Error();
    } catch (e) {
        if (memReplacement) return memStorage;
        return;
    }

    return ret;
}