Browser event delegation.
Delegator is a mini library (1.3k minified & gzip) that provides Event Delegation. This works with click, mousedown, mouseup, mousemove, mouseover, mouseout, keydown, keypress, keyup, blur, focus, submit (does not work with "change" or "reset"). A CSS like selector with limited features is used to target nodes. It supports tag, id and class name based rules using the CSS syntax. Multiple rules may be provided by using the comma separator. There are some examples which also serve as unit tests. It tries to be small, dumb and fast.