Global & Window Objects

• window.document → Access the DOM.
• window.location → Access and modify the URL.
• window.history → Manage browsing history (back() / forward() / go(n)).
• window.navigator → Access browser information (navigator.userAgent).
• window.screen → Access screen details.
• window.innerWidth / innerHeight → Get the current window size.
• window.performance → Retrieve performance metrics.

Dialogs & User Interaction

• window.alert(message) → Display an alert dialog.
• window.confirm(message) → Display a confirmation dialog.
• window.prompt(message, defaultValue?) → Display an input dialog.

alert("Hello, world!");
const isConfirmed = confirm("Are you sure?");
const userInput = prompt("Enter your name:");

Window Control & Utilities

• window.open(url, target) → Open a new window/tab (may be blocked by pop-up blockers).
  • target can be _self, _blank, _parent, _top.
• window.scrollTo(x, y) → Scroll the page to a specific position.
  • window.scrollTo({ top: 500, behavior: "smooth" }) → Smooth scroll.
• setTimeout(callback, delay) → Execute code after a delay.
• setInterval(callback, interval) → Execute code repeatedly at a given interval.
• navigator.clipboard.writeText(text) → Copy text to clipboard.
• navigator.clipboard.readText() → Read text from clipboard.