25.1 When attaching data payloads to events (whether DOM events or something more proprietary like Backbone events), pass a hash instead of a raw value. This allows a subsequent contributor to add more data to the event payload without finding and updating every handler for the event. For example, instead of:
// bad
$(this).trigger('listingUpdated', listing.id);
// ...
$(this).on('listingUpdated', (e, listingId) => {
// do something with listingId
});
prefer:
// good
$(this).trigger('listingUpdated', { listingId: listing.id });
// ...
$(this).on('listingUpdated', (e, data) => {
// do something with data.listingId
});