Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.

Image () object in JavaScript and pass it the URL of the image you want preloaded. Say we have an image called heavyimagefile.jpg, which we want to ...

JavaScript Date object The Date object in JavaScript is the main element when it comes to handling date and time.

Learn more about AJAX, a technique that uses JavaScript and the XMLHTTPRequest object to create faster and better interactive web apps.