It might be the very first thing a lot of people learn in JavaScript: alert("Hello, World"); One day at CodePen, we woke up to a ton of customer support... (more…)

We recommend upgrading to the latest Safari, Google Chrome, or Firefox. (more…)

There are many ways to traverse an array in Javascript. In this benchmark, we will look at five different ways and the pros and cons of each. Keep in mind that these benchmarks were run in a Chrome browser on Codepen. Results will vary by browser/interpre... (more…)

A stable, reliable, high-speed, globally available content distribution network for the most popular open-source JavaScript libraries. (more…)

Clio is a functional, parallel, distributed programming language... (more…)