
A Friendly Introduction to the Document Object Model (DOM) API
The Document Object Model (DOM) is the browser’s in-memory representation of your HTML, letting JavaScript select elements (querySelector), listen to events (addEventListener), update content (textContent), toggle styles (classList), and create/insert nodes (createElement, insertAdjacentElement). With it, a button can change a box’s text, toggle a highlight class, set a data attribute, or insert a new paragraph right after the box—no page reload required—illustrating the simple flow: select, listen, update.

