Function for enumerating storage contents.

entries-from-storage.js

/**
 * Turns a storage into an array of key/value tuples.
 * (Same format as the result of {@link Object.entries}.)
 * @param {Storage} storage A storage instance (e.g. {@link Window.localStorage}).
 * @returns {[string, string][]} Key/value tuple array of entries.
 */
function entriesFromStorage(storage) {
    return new Array(storage.length).fill(0)
        .map((e, i) => storage.key(i))
        .map(key => [key, storage.getItem(key)]);
}