A computer can be configured to execute event-driven applications by programming the computer with software that provides an event-driven execution environment including an event dispatcher. The event dispatcher can be used to relay events by receiving and dispatching the events from software components of an event-driven application during execution thereof. While the event-driven application is executing, the event dispatcher can be monitored in order to generate and store a log or other record(s) identifying one or more events that occur during execution. The log can be stored in a computer-readable medium accessible by the computing apparatus and used to provide information about at least some of the one or more events. As an example, the log data may be used to generate a timeline showing the relative order of events and the components that generated and listened to the events.