extjs-capture.js

// to capture ALL events use:
Ext.util.Observable.prototype.fireEvent = 
    Ext.util.Observable.prototype.fireEvent.createInterceptor(function() {
        console.log(this.name);
        console.log(arguments);
        return true;
});
 
// to capture events for a particular component:
Ext.util.Observable.capture(
    Ext.getCmp('my-comp'),
    function(e) {
        console.info(e);
    }
);