Que sont les systèmes de conception ?

Ever notice how Google or Apple feel so consistent everywhere? That cohesion usually comes from a Design System — and that is exactly what you will learn here.

A Design System is the complete set of standards, docs, and reusable components for building a product — a single source of truth for design and code.

Building UI without a system is like building a house with no blueprint. A Design System brings consistency, speeds development, and lifts quality.

Visual style defines the look: color palettes, typography, and spacing rules. It is the aesthetic foundation every screen follows.

UI components are the pre-built, pre-coded blocks of your interface — buttons, inputs, nav bars — each with a defined look and behavior.

Documentation is the user manual: it spells out how to use each component and apply the style correctly, including accessibility and code.

A style guide is mostly static visual rules. A design system contains that guide but adds coded components, usage docs, and governance — a living product.

A component library is coded UI elements — one part of a design system. The system also adds principles, visual style, docs, and process.

Picture a LEGO kit: docs are the instructions, visual style is the colors, components are the bricks. The design system is the whole package.

A Design System is a holistic set of standards, components, and docs — far more than a style guide or component library alone. Great start!