Advanced React Patterns

Take your React skills to the next level by mastering these professional design patterns.

1. Compound Components

Allows components to share state implicitly while remaining flexible in their UI structure. Think of <Select> and <Option>.

<Menu>
  <Menu.Button>Actions</Menu.Button>
  <Menu.List>
    <Menu.Item>Edit</Menu.Item>
    <Menu.Item>Delete</Menu.Item>
  </Menu.List>
</Menu>

2. Higher-Order Components (HOC)

A function that takes a component and returns a new component with enhanced functionality.

• Axiom: Mostly replaced by Hooks today, but still useful for cross-cutting concerns like Auth wrappers.

3. Render Props

A pattern where a component's content is determined by a function passed as a prop.

<MouseTracker render={mouse => (
  <p>The mouse position is {mouse.x}, {mouse.y}</p>
)}/>

4. Controlled vs Uncontrolled Components

• Controlled: State is handled by React (value + onChange).
• Uncontrolled: State is handled by the DOM (useRef + defaultValue).

Next Step: Challenges in Machine Coding.