Function length

src/drivers/localstorage.js:208–216

(callback)

// Supply the number of keys in the datastore to the callback function.
function length(callback) {
    var self = this;
    var promise = self.keys().then(function(keys) {
        return keys.length;
    });

    executeCallback(promise, callback);
    return promise;
}

// Remove an item from the store, nice and simple.
function removeItem(key, callback) {