getItems() / setItems() methods would be nice

[yuriy-yarosh]

I'm facing a lack of multiple entities fetching possibility, so I have to sync getting the last one manually.
It's not so tricky, but I think it would be a simple improvement.

[thgreasi]

How about:

Promise.all([
    localforage.getItem('item1'),
    localforage.getItem('item2')
]).then(function(results) {
    console.log(results);
});

// OR

var items = ['item1', 'item2', 'item3'];
var promises  = items.map(function(item) { return localforage.getItem(item); });
Promise.all(promises).then(function(results) {
    console.log(results);
});

If getItems() / setItems() are going to be implemented by localforage at some point, then something like the 2nd example might actually have to be used by some drivers.

[yuriy-yarosh]

Well, I do not use promises, but chaining promises is much more simplier than chaining callbacks.

[tofumatt]

This has been brought up in #21. I definitely want this in the future (see the milestone for 1.2 that actually references it).

I've copied @thgreasi's code example to that issue; let's keep the discussion going over there to prevent duplicate issues. 😄