# Introducing the DOM: an overview

When the browser loads a page, it turns the HTML into the DOM, a tree of objects with one for each element, and JavaScript reads and changes the page through that tree.

![Cheat sheet: Introducing the DOM: an overview](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/c79aee3141e64598ba9a064afc2c604d.webp)

- Category: JavaScript
- Level: Novice
- Tags: DOM, JavaScript
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/introducing-the-dom-an-overview-cheat-sheet