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.

Since this new object is a JavaScript array, Arquero methods won’t work on it anymore, but conventional array methods will. Here’s an example: 'The regions are ' + region_array.join(', ') ...

JavaScript file upload logic. The above script tag contains nothing but pure JavaScript. There’s no jQuery or Dojo thrown into the mix and the logic is straightforward: Create a FormData object to ...