DOM Event Usage Dumper (and friends)

dumpEvents.js

/**
 * Handy for checking for event spamming
 * @returns {Object} A map of event name to number of occurances.
 */
function getEventCounts() {

    var eventCounts = {};

    function incrementEventCounter( eventName ) {
        eventCounts[eventName] || ( eventCounts[eventName] = 0 );
        eventCounts[eventName] += 1;
    }

    $('*').each( function(idx, item) {

        var events = $._data(item, 'events');

        if (!events) return;

        for (var i in events) {
            if ( events.hasOwnProperty(i) ) {
                incrementEventCounter( i );
            }
        }

    });

    return eventCounts;

}