Learn P5JS with Real Code Examples
Updated Nov 26, 2025
Architecture
Core library built on top of JavaScript and HTML5 Canvas/WebGL
`setup()` runs once, `draw()` loops continuously
State is typically global or object-oriented
Uses event-driven programming for interactivity
Extensible via plugins and additional p5 libraries
Rendering Model
Uses HTML5 Canvas or WebGL for drawing
`draw()` loop updates canvas every frame
Event-driven for user interactions
State stored in variables or objects
Supports layering and transformations
Architectural Patterns
Global sketch structure with `setup()` and `draw()`
Event callbacks for interactivity
Optional modular code in external JS files
Animation loops handled automatically
Extensible via plugins and libraries
Real World Architectures
Educational platforms and coding schools
Online art installations and exhibitions
Web-based games and interactive storytelling
Data visualization demos
Creative coding workshops
Design Principles
Accessibility for beginners and artists
Simplify web-based graphics programming
High-level API for 2D/3D visuals
Encourage experimentation and creativity
Open-source and community-driven development
Scalability Guide
Small: simple drawing sketches
Medium: interactive sketches and games
Large: multimedia and 3D projects
Enterprise: educational platforms and demos
Global: online sharing and creative coding community
Migration Guide
Move HTML/JS files between projects
Update CDN links for latest version
Test sketches in new browser versions
Adapt external library usage as needed
Refactor code for modularity if required