JavaScript DOM for Beginners
DOM (Document Object Model) When a browser loads a web page, it converts the HTML into a structured tree of objects. This tree is called the DOM. Each element becomes a node (object) that JavaScript can interact with. Example HTML: <body> <h1> Hello </h1> <p> Welcome </p> </body> DOM structure: Document └── html └── body ├── h1 └── p Why is DOM important? - Access elements - Modify content - Change styles - Handle events (clicks, typing, etc.) Accessing Elements in the DOM: JavaScript provides several ways to select and access elements in a web page. Here are the most commonly used methods: Selects a single element with a specific id const element = document . getElementById ( " title " ); Returns a collection of elements with the given class const elements = document . getElementsByClassName ( " item " ); Selects all elements with a specific tag ( like < p > ) const elements = document . getElementsByTagName ( " p " ); Selects the first matching element using CSS selectors const eleme
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