The Document Object Model — a tree-like structure that represents your HTML page, allowing JavaScript to read and change it.
The DOM is how JavaScript sees your HTML page. When a browser loads HTML, it builds a tree structure called the DOM. Each HTML element becomes a 'node' in the tree with properties and relationships.
Imagine HTML as a blueprint; the DOM is the actual building. JavaScript can query the DOM to find elements, read their values, and modify them. When you change the DOM, the browser re-renders the page instantly. This is how interactions work—click a button, JavaScript modifies the DOM, page updates without refreshing.
Understanding the DOM is crucial because modern web development is about manipulating the DOM in response to user actions. React, Vue, and other frameworks are essentially efficient ways to update the DOM. React uses Hooks like useEffect to manage DOM side effects.
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