When you want to make your PixiJS games interactive, you need to handle user input. PixiJS provides a flexible event system that lets you respond to different types of user actions, such as clicking, tapping, or moving the mouse. The three main categories of events supported by PixiJS are pointer events, mouse events, and touch events.

Pointer events are the most versatile type. They are designed to work across a wide range of devices, including desktops with mice and mobile devices with touchscreens. This means you can use pointer events to handle both mouse clicks and touch taps with a single event handler. Common pointer events include "pointerdown", "pointerup", and "pointermove".

Mouse events are more traditional and only respond to actions from a mouse, such as "mousedown", "mouseup", and "mousemove". These are useful if you are targeting desktop environments where users interact primarily with a mouse.

Touch events are specific to touch-enabled devices. They include events like "touchstart", "touchend", and "touchmove", which respond only to touch input, such as a finger tap or swipe.

In most modern PixiJS projects, you will use pointer events because they offer the broadest compatibility. By handling pointer events, you can ensure that your game responds to both mouse and touch input without writing separate handlers for each device type.