JS Modular Patterns

Organized JavaScript is the foundation of a predictable presentation layer. This skill focuses on patterns that scale without becoming "spaghetti code."

Core Patterns

• Module Pattern (ESM): Use import/export to keep code encapsulated and clear.
• Event Delegation: Attach listeners to a parent element to manage dynamic children efficiently.
• State Management: Use a simple "Store" pattern with Pub/Sub or CustomEvent for cross-component communication.

API Integration

• Fetch Wrapper: Create a centralized utility for API calls with built-in error handling and auth headers.
• Async/Await: Use try/catch blocks for clean asynchronous flow.

Best Practices

• No Globals: Keep everything inside modules or IIFEs.
• Naming: Functions should be verbs (getData, updateUI).
• Composition: Prefer small, single-purpose functions over large monoliths.