JavaScript variables hold a wide variety of information and can be used with virtually any data type. Here's how to use variables to store numbers, text strings, objects, and more.

The format is derived from the JavaScript programming language standard and follows JavaScript object syntax. JSON consists of name-object pairs and punctuation in the form of brackets, parentheses, ...

JavaScript creates an XMLHttpRequest object. This object sends a request to the corresponding web server. The server processes the request and sends a response back to the browser. JavaScript reads ...