PluginBench
Skill
Pass
Audit score 90

pixijs-events

pixijs/pixijs-skills

Handle pointer, mouse, touch, and wheel input in PixiJS v8 with federated events.

What is pixijs-events?

This skill provides comprehensive event handling for PixiJS v8 applications, covering pointer events, mouse input, touch gestures, and wheel interactions. Use it when building interactive UI elements, drag-and-drop functionality, or any scene requiring user input detection and response.

  • Set eventMode (none, passive, auto, static, dynamic) to control which objects receive events
  • Listen for pointer, mouse, touch, and wheel events using .on(), addEventListener(), or property handlers
  • Implement drag-and-drop with pointerdown/pointerup and globalpointermove tracking
  • Define custom hit areas (Rectangle, Circle, Polygon, or custom contains) to optimize hit testing
  • Configure cursor styles per-object or register named cursor styles globally
  • Use capture phase events to intercept and stop event propagation before reaching targets

How to install pixijs-events

npx skills add https://github.com/pixijs/pixijs-skills --skill pixijs-events
Prerequisites
  • PixiJS v8 installed
  • Basic understanding of event listeners and event propagation
Claude Code
Cursor
Windsurf
Cline

How to use pixijs-events

  1. 1.Set eventMode='static' on any Container or Sprite that should receive events
  2. 2.Attach event listeners using .on('eventname', handler) or addEventListener()
  3. 3.For drag operations, listen to pointerdown/pointerup and use globalpointermove to track movement
  4. 4.Define custom hitArea shapes (Rectangle, Circle, Polygon) to optimize hit testing if needed
  5. 5.Register cursor styles on app.renderer.events.cursorStyles for reusable cursor definitions
  6. 6.Use event.stopPropagation() to prevent events from bubbling to parent containers

Use cases

Good for
  • Building interactive buttons and UI controls that respond to clicks and taps
  • Implementing drag-and-drop for sprites and containers across desktop and touch devices
  • Creating hover effects and cursor changes based on pointer position over interactive objects
  • Optimizing hit detection on complex objects by defining custom hitArea shapes
  • Handling multi-touch input with individual touch event tracking and modifier keys
Who it's for
  • Game developers building interactive PixiJS applications
  • UI/UX developers creating interactive canvas-based interfaces
  • Web developers implementing cross-device input handling (mouse, touch, pen)
  • Performance-conscious developers optimizing hit testing on large scene graphs

pixijs-events FAQ

What's the difference between eventMode values?

'static' enables standard interaction; 'dynamic' adds synthetic events when pointer is stationary over animated objects; 'passive' allows children to be interactive but not the object itself; 'auto' only enables interaction if a parent is interactive; 'none' disables all interaction including children.

How do I implement drag-and-drop?

Listen to pointerdown to start dragging, use globalpointermove (not pointermove) to track movement even outside the object, and pointerup/pointerupoutside to end dragging. Update position in the globalpointermove handler.

What event types are available?

Pointer events (pointerdown, pointerup, pointermove, etc.) work across all devices; mouse events (mousedown, click, wheel) are mouse-specific; touch events (touchstart, touchend, tap) are touch-specific; global move events (globalpointermove, globalmousemove) fire regardless of pointer position.

How do I optimize hit testing for complex objects?

Set a custom hitArea using Rectangle, Circle, Polygon, or a custom object with a contains() method. This avoids expensive bounds checking and can significantly improve performance on large scene graphs.

Can I use both EventEmitter and DOM-style listeners?

Yes, PixiJS supports both .on()/.off() (EventEmitter style) and addEventListener()/removeEventListener() (DOM style) on the same object, including capture phase with {capture: true} option.

Full instructions (SKILL.md)

Source of truth, from pixijs/pixijs-skills.


name: pixijs-events description: "Use this skill when handling pointer, mouse, touch, or wheel input in PixiJS v8. Covers eventMode (none, passive, auto, static, dynamic), FederatedEvent types, propagation and capture phase, hitArea, interactiveChildren, cursor and cursorStyles, global move events for drag, eventFeatures config. Triggers on: eventMode, FederatedPointerEvent, pointerdown, click, tap, globalpointermove, drag, hitArea, cursor, stopPropagation, persistentDeviceId." license: MIT

PixiJS's federated event system mirrors DOM events on the scene graph. Set container.eventMode = 'static' to opt an object in, then listen with .on(), addEventListener(), or onEventName property handlers. Move events fire only over the listening object; use globalpointermove for drag.

Quick Start

const button = new Sprite(await Assets.load("button.png"));
button.eventMode = "static";
button.cursor = "pointer";
app.stage.addChild(button);

button.on("pointertap", (event) => {
  console.log("clicked at", event.global.x, event.global.y);
});

let dragging = false;
button.on("pointerdown", () => {
  dragging = true;
});
button.on("pointerup", () => {
  dragging = false;
});
button.on("pointerupoutside", () => {
  dragging = false;
});
button.on("globalpointermove", (event) => {
  if (dragging) button.parent.toLocal(event.global, undefined, button.position);
});

Related skills: pixijs-accessibility (screen reader + keyboard), pixijs-scene-dom-container (HTML overlays), pixijs-performance (event-heavy scenes).

Core Patterns

eventMode values

import { Sprite } from "pixi.js";

const sprite = new Sprite();

// No interaction at all; children also ignored
sprite.eventMode = "none";

// Default. Self not interactive; interactive children still work
sprite.eventMode = "passive";

// Hit tested only when a parent is interactive
sprite.eventMode = "auto";

// Standard interaction: receives pointer/mouse/touch events
sprite.eventMode = "static";

// Like static, but also fires synthetic events from the ticker
// when the pointer is stationary (for animated objects under cursor)
sprite.eventMode = "dynamic";

Use 'static' for buttons, UI elements, and drag targets. Use 'dynamic' only for objects that move under a stationary cursor and need continuous hover updates.

Use isInteractive() to check whether an object can receive events:

sprite.eventMode = "static";
sprite.isInteractive(); // true

sprite.eventMode = "passive";
sprite.isInteractive(); // false

Event types

Pointer events (recommended for cross-device compatibility): pointerdown, pointerup, pointerupoutside, pointermove, pointerover, pointerout, pointerenter, pointerleave, pointertap, pointercancel.

Mouse events: mousedown, mouseup, mouseupoutside, mousemove, mouseover, mouseout, mouseenter, mouseleave, click, rightdown, rightup, rightupoutside, rightclick, wheel.

Touch events: touchstart, touchend, touchendoutside, touchmove, touchcancel, tap. Each touch carries altKey, ctrlKey, metaKey, and shiftKey copied from the native TouchEvent, so modifier keys work the same as with mouse or pointer events.

Global move events: globalpointermove, globalmousemove, globaltouchmove. These fire on every pointer movement regardless of whether the pointer is over the listening object.

Container lifecycle events (no eventMode required): added, removed, destroyed, childAdded, childRemoved, visibleChanged.

Listening styles

import { Sprite } from "pixi.js";

const sprite = new Sprite();
sprite.eventMode = "static";

// EventEmitter style (recommended)
const handler = (e) => console.log("clicked");
sprite.on("pointerdown", handler);
sprite.once("pointerdown", handler); // one-time
sprite.off("pointerdown", handler);

// DOM style
sprite.addEventListener(
  "click",
  (event) => {
    console.log("Clicked!", event.detail);
  },
  { once: true },
);

// Property-based handlers
sprite.onclick = (event) => {
  console.log("Clicked!", event.detail);
};

Pointer events and propagation

import { Sprite, Container } from "pixi.js";

const parent = new Container();
parent.eventMode = "static";

const child = new Sprite();
child.eventMode = "static";
parent.addChild(child);

child.on("pointerdown", (event) => {
  console.log("child pressed");
  event.stopPropagation(); // prevent parent from receiving this event
});

parent.on("pointerdown", () => {
  console.log("parent pressed (only if child did not stop propagation)");
});

Capture phase events

All events support capture phase by appending capture to the event name (e.g., pointerdowncapture, clickcapture). Capture listeners fire during the capturing phase, before the event reaches its target.

container.addEventListener(
  "pointerdown",
  (event) => {
    event.stopImmediatePropagation(); // blocks event from reaching children
  },
  { capture: true },
);

Hit testing

When a pointer event fires, PixiJS walks the display tree to find the top-most interactive element under the pointer. The traversal follows these rules:

  • eventMode = 'none' on a container skips that element and its entire subtree.
  • interactiveChildren = false on a container skips its children (the container itself can still be tested).
  • A hitArea overrides bounds-based testing; only the shape is checked.
  • Objects that are not visible, not renderable, or not measurable are skipped.

Set a custom hitArea to override bounds-based testing. This also speeds up hit tests on large or complex objects by reducing the geometry checked:

import { Sprite, Rectangle, Circle, Polygon } from "pixi.js";

const sprite = new Sprite();
sprite.eventMode = "static";

// Rectangular hit area
sprite.hitArea = new Rectangle(0, 0, 100, 50);

// Circular hit area
sprite.hitArea = new Circle(50, 50, 40);

// Polygon hit area
sprite.hitArea = new Polygon([0, 0, 100, 0, 50, 100]);

// Custom hit test via contains()
sprite.hitArea = {
  contains(x: number, y: number): boolean {
    return x >= 0 && x <= 100 && y >= 0 && y <= 100;
  },
};

Global move events and drag

import { Sprite, FederatedPointerEvent } from "pixi.js";

const sprite = new Sprite();
sprite.eventMode = "static";
sprite.cursor = "grab";

let dragging = false;

sprite.on("pointerdown", (event: FederatedPointerEvent) => {
  dragging = true;
  sprite.cursor = "grabbing";
});

// globalpointermove fires even when pointer leaves the object
sprite.on("globalpointermove", (event: FederatedPointerEvent) => {
  if (dragging) {
    sprite.position.set(event.global.x, event.global.y);
  }
});

sprite.on("pointerup", () => {
  dragging = false;
  sprite.cursor = "grab";
});

sprite.on("pointerupoutside", () => {
  dragging = false;
  sprite.cursor = "grab";
});

Cursor styles

Basic usage sets the cursor property per-object. For reusable cursors, register named styles on the event system:

app.renderer.events.cursorStyles.default = "url('bunny.png'), auto";
app.renderer.events.cursorStyles.hover = "url('bunny_saturated.png'), auto";

sprite.eventMode = "static";
sprite.cursor = "hover"; // uses the registered 'hover' style

Cursor styles can be strings (CSS cursor values), objects (applied as CSS styles), or functions (called with the mode string).

Event properties

FederatedPointerEvent carries rich input data; the more useful fields are:

sprite.on("pointerdown", (event: FederatedPointerEvent) => {
  event.global; // scene-space Point where the event happened
  event.client; // CSS-pixel Point relative to the viewport
  event.offset; // Point w.r.t. target Container in world space (not supported at the moment)
  event.target; // the Container that received the event
  event.currentTarget; // the Container whose listener is running

  event.pointerType; // 'mouse' | 'pen' | 'touch'
  event.pointerId; // unique id for multi-touch tracking
  event.isPrimary; // first pointer in a multi-pointer gesture
  event.persistentDeviceId; // always 0; present for DOM PointerEvent type compatibility
  event.pressure; // 0-1 pen/touch pressure
  event.button; // 0 left, 1 middle, 2 right
  event.buttons; // bitmask of held buttons
  event.altKey; // modifier key state
  event.ctrlKey;
  event.shiftKey;
  event.metaKey;

  event.nativeEvent; // the underlying DOM PointerEvent / MouseEvent / Touch
  event.preventDefault();
  event.stopPropagation();
  event.stopImmediatePropagation();
});

FederatedWheelEvent adds deltaX, deltaY, deltaZ, and deltaMode. Wheel events fire on the same hit-tested object as pointer events.

Event features

Toggle event categories globally for performance:

await app.init({
  eventFeatures: {
    move: true, // pointer/mouse/touch move events
    globalMove: true, // global move events (globalpointermove, etc.)
    click: true, // click/tap/press events
    wheel: true, // mouse wheel events
  },
});

// or configure after init
app.renderer.events.features.globalMove = false;

Performance tips

  • Set eventMode = 'none' on non-interactive subtrees to skip hit testing entirely.
  • Set interactiveChildren = false on containers where only the container itself needs interaction.
  • Use hitArea on large or complex objects to replace bounds-based hit testing with a cheap shape check.
  • Prefer 'static' for stationary elements; reserve 'dynamic' for objects that move or animate under a stationary pointer.
  • Disable unused event features via eventFeatures (e.g., globalMove: false) to cut per-frame work.

Common Mistakes

[HIGH] Default eventMode is passive

Wrong:

const sprite = new Sprite(texture);
sprite.on("pointerdown", () => {
  console.log("clicked");
});

Correct:

const sprite = new Sprite(texture);
sprite.eventMode = "static";
sprite.on("pointerdown", () => {
  console.log("clicked");
});

The default eventMode is 'passive', which means the object itself receives no events. You must explicitly set eventMode to 'static' or 'dynamic' before any listener will fire.

[HIGH] buttonMode removed; use cursor

Wrong:

sprite.interactive = true;
sprite.buttonMode = true;

Correct:

sprite.eventMode = "static";
sprite.cursor = "pointer";

buttonMode was removed in v8. Use cursor = 'pointer' to show a hand cursor on hover. interactive = true still works as an alias for eventMode = 'static', but eventMode is preferred.

[HIGH] Move events only fire over the object in v8

Wrong:

sprite.eventMode = "static";
sprite.on("pointermove", (event) => {
  // expects to fire everywhere; only fires inside sprite bounds
  updateDrag(event.global.x, event.global.y);
});

Correct:

sprite.eventMode = "static";
sprite.on("globalpointermove", (event) => {
  // fires everywhere, even outside sprite bounds
  updateDrag(event.global.x, event.global.y);
});

In v8, pointermove, mousemove, and touchmove only fire when the pointer is over the display object. In v7 they fired on any canvas move. For drag operations or global tracking, use globalpointermove, globalmousemove, or globaltouchmove.

[MEDIUM] Cursor does not inherit from parent

Setting cursor on a parent container has no effect on its children. Only the direct hit target's cursor value is applied.

// This does NOT make children show a pointer cursor
parent.cursor = "pointer";

// Each interactive child needs its own cursor
child.eventMode = "static";
child.cursor = "pointer";

If you want a uniform cursor for all children, set cursor on each interactive child individually, or set hitArea on the parent and make children non-interactive.

API Reference