🌐 Browser Object Model (BOM)

Last Updated: 26th October 2025

  • BOM (Browser Object Model) allows JavaScript to interact with the browser itself — not just the webpage (DOM).
  • It provides access to browser features like window, screen, location, history, navigator, and alert dialogs.

Hinglish Tip 🗣: DOM webpage ke elements ko handle karta hai, BOM browser ke features (jaise URL, history, alert box) ko control karta hai.

  • The window object is the global object in the browser.
  • Every global variable, function, or object automatically becomes a property of window.
console.log(window);

We Have already cover basic window methods alert(), confirm(), prompt() in Basic BOM

BOM vs DOM

BOM allows you to interact with the browser, while DOM allows you to interact with the webpage.

// Window methods
window.alert("Hello from Window!");
console.log(window.innerWidth); // browser window width

// Document methods
document.write("Hello from Document!");
console.log(document.title); // page title

Hinglish Tip 🗣: BOM browser ke control karta hai, DOM webpage ke elements ko handle karta hai.

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