CodePen

CodePen is an online community where developers showcase and test CSS, HTML and JavaScript code snippets. While designed as an online code editor, CodePen also functions as an open source learning environment. It was developed in 2012 by Tim Sabat, Alex Varez and Chris Coyier, and has grown to become one of the largest communities for web developers and designers. It has more than 33000 users and receives 16.9 million visitors each month.

At its heart, CodePen allows users to write code in the browser and view visual results in real time. There is a huge focus on frontend languages including CSS, HTML, and JavaScript. Developers use the platform to prototype new ideas, test apps for bugs, evaluate potential hires, send things to clients for evaluation and find inspiration. Some use it as a portfolio to showcase their work.

CodePen Benefits

Flavors of frontend languages: CodePen supports multiple flavors of CSS, HTML, and JavaScript. For CSS, it supports SCSS, SaSS, Stylus, and Less. HTML options include Slim, Jade, HAML and Markdown. Under the JavaScript menu, one can opt for LiveScript, CoffeeScript, AngularJS, and jQuery.

Different pen views: There are eight different pen views, each with its own advantages. These include editor pen, details view, full-page view, and debug view.

Emmet and vim building: CodePen utilizes toolkits like Emmet and Vim Key Bindings to ensure smoother and faster development. Emmet keeps projects moving while Vim allows for command line keyboard shortcuts.

Blogging: While a relatively new feature, Blogging allows users to write code in the same way as on a regular blog. They can use Markdown and add custom CSS to posts.

Community and support: This is by far what sets apart CodePen from other web development platforms. People can provide constructive criticism, share ideas, and learn together. There is always room for improvement, and the CodePen community ensures continued learning.

Templates: This feature allows CodePen users to create templates and avoid the hassle or starting projects from scratch every time. It is a huge time saver, especially for individuals who work on similar projects regularly.