Understand the DOM Hierarchy

Overview

TypeScript's DOM types accurately model the browser's DOM hierarchy. Understanding this hierarchy - Element extends Node, HTMLElement extends Element, etc. - helps you write correct DOM code. Use the most specific type possible for better autocompletion and type safety.

When to Use This Skill

• Working with DOM APIs
• Typing element references
• Creating DOM utilities
• Handling DOM events
• Manipulating the DOM

The Iron Rule

Use the most specific DOM type possible. HTMLElement for HTML elements, HTMLInputElement for inputs, etc.

DOM Type Hierarchy