Adding Shift+Click Multi-Select Capability to the SuperBoxSelect Plugin

When I began using the SuperBoxSelect plugin at work, things went from good to awesome pretty damn quick. SuperBoxSelect offers a lot of great features that standard combo boxes don’t as well as directly integrating with the rest of ExtJS so you can do cool things like tie them to a JsonStore and write custom event handlers. Unfortunately, this plugin does support a commonly used feature among standard combo boxes: Shift+Click Selection. Read more