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.

In contrast, using JSON in JavaScript is dead simple. Try it out. Hit F12 in your browser to open a JavaScript console, then paste in the JSON shown in Listing 3.

XML is more difficult to manage than JSON format. Converting XML into a JavaScript object takes up to tens or hundreds more lines of code compared to JSON, and it requires an XML parser. XML documents ...