Summary  
This chapter covers grouping display objects with a container to treat multiple elements as a single unit for unified transformations, effects, and hierarchical organization.

General domain of usage  
Game development

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

Grouping sprites using a container in PixiJS lets you manage multiple objects as a single unit. This hierarchical organization offers several benefits:

- **Simplifies movement and transformations** by allowing you to change a single container property to affect all its children;
- **Makes it easier to build complex objects** from simpler parts, such as vehicles, characters, or UI panels;
- **Allows you to apply effects, scaling, or rotation** to a whole group at once;
- **Helps keep your scene graph organized**, especially in games with many interactive or animated elements.

You will often use containers in practical scenarios like moving a character with attached equipment, animating a group of collectibles, or managing layers of backgrounds and foregrounds in a game.

When you move a container in PixiJS, what happens to the sprites inside it?

Create interactive 2D game graphics using PixiJS and JavaScript. Work with sprites, textures, animation, containers, and event handling to build dynamic visual scenes.

Build a strong foundation by learning how PixiJS handles textures and sprites. Work with positioning, movement, and visual effects to create expressive 2D elements. Gain essential skills for constructing any graphical or game scene.

Animate sprites using frame-based techniques and organize game objects with containers. Learn how grouping improves performance and structure in larger scenes. Create animated characters and reusable visual components.

Add player interaction through mouse, touch, and keyboard events. Make sprites respond to clicks and movement while controlling character input. Develop interactive game mechanics that engage users.

Apply basic physics concepts such as gravity, collisions, and velocity to bring motion to life. Manage game state and implement foundational logic for movement, rules, and challenges. Build systems that simulate real gameplay behavior.

Grouping Sprites with Containers