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Design Systems & Component Libraries · Lesson

Composition and the Children Pattern

Build flexible, reusable UI components by favoring composition over rigid configuration, using slots and the children pattern to keep components adaptable.

Composition Over Configuration

A component that tries to support every layout through dozens of props becomes a tangled mess. Composition solves this: let consumers pass content in, rather than describing it with flags.

This lesson teaches composition patterns that keep components small and flexible.

The Prop Explosion Problem

Consider a Card with showHeader, headerText, showIcon, iconName, showFooter... it never ends.

Each new use case adds a prop. The component grows unmaintainable. Composition lets the consumer supply the pieces instead.

All lessons in this course

  1. Stateless vs. Stateful Components
  2. Props, State, & Event Handling
  3. Accessibility (a11y) Best Practices
  4. Composition and the Children Pattern
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