• An FPS limiter
• Ability to add and enable/disable event callbacks
• Short-circuiting subsequent callbacks, by returning true from them, e.g. to capture input to UI
• Maintains one copy of the module only, preventing errors should multiple libraries include their own copy

• pre_quit() - An event that runs before quit, and can be used to stop the program from terminating
• dispatch(event, ...) - A dispatch event, to which all events are sent
• pre_update(dt) - An event that runs before love.update()
• post_update(dt) - An event that runs after love.update()
• postprocess(draw_dt) - A second draw event, called after draw, can be used to draw overlay, profiling info, etc.

• modrun.setup() - Sets modrun up, replacing the original love.run
• modrun.registerEventType(event, fail_if_exists) - Registers a new event, issues a warning, or optionally an error, if the event already exists
• modrun.addCallback(event, callback, self_obj, on_error) - Registers a new callback for an event, optionally includes an error handler, and an object to be passed as "self"
• modrun.removeCallback(event, callback) - Removes a previously registered callback
• modrun.enableCallback(event, callback) - Enables a callback
• modrun.disableCallback(event, callback) - Disables a callback, preventing it from being processed
• modrun.setFramerateLimit(fps) - Set maximum FPS to the given value. Pass 0 or false to disable the limit. Only applies if vsync is disabled
• modrun.push(event, ...) - Push an event to the queue. Essentially same as love.event.push()

For detailed documentation, check source