Moment.js - A lightweight javascript date library

Comprehensive, yet simple, stealthy and fast. Datejs has passed all trials and is ready to strike. Datejs doesn’t just parse strings, it slices them cleanly in two.

Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or image crop and rotate widget, for example, you can achieve it simply and easily with this libr...

BubbleTree is a library for interactive visualization of hierarchical data. Originally developed mainly for spending data, the library is now completely independent from the OpenSpending platform. BubbleTree is built on top of jQuery and Raphael...

Chart.js seems to be a good alternative to Google's Chart API and other commercial chart drawing libraries.

• good looking charts
• canvas based (means less memory consumptive, but no interactivity out of the box)
• hig...

Inspired by a snippet of code in Oliver Steele’s legendary Functional library, here’s a lightweight tool to help keep track of JavaScript invocations. It works in Chrome, Safari, Firebug and IE8.

Checking if a JavaScript value is of a given type can be very confusing:

• There are two operators typeof and instanceof which work very differently.
• JavaScript has some primitive types, like string literals, that are not objects (as oppose...

sing Google’s JavaScript Library CDN comes with a 1/3 of a second tax on missing. (Note that a tax like this applies to opening connections to a any new host: JavaScript Library CDNs, advertisers, analytics and visitor tracking, etc. This is why y...

Grafico is a javascript charting library built with Raphaël and Prototype.js. The library provides a wide array of graphs and stays with the guidelines laid out by Stephen Few and Edward Tufte. Grafico provides pretty charts that effectively commu...

A tooltip library that does not use Javascript. Works in IE9+.

This library (or the technique used by it) could be a great choice for projects with a lot of tooltips, which are hard to do fast with Javascript.

Tod is a gem for working with daytimes. That's a tuple of (hour, minute second) without a day, month or year.

Another additional gem?

Thus SQL has a time datatype for storing time of day in the format hh:mm:ss, neither Ruby nor Rails t...