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Whether you're a beginner programmer or an expert developer, code playgrounds are useful when sharing and learning with others. These are web applications that allow real-time editing and previews of client-side codes: HTML, CSS, and JavaScript. Code playgrounds are online services where you can write, compile (or run), and share code with others. They also give you the ability to fork and play around with others' codes. Through this, they can edit the code online, preview the work at each stage, may debug the error as well as test the cases of the snippets. Developers can share the code as well and see the changes they made in the code. On that note, this article lists the top 10 code playgrounds every web developer should try.
It provides an environment to build apps and assists to test the snippets of HTML and CSS. It allows you to edit the code and also, you can debug the code. Once you finalize the code, you may send it to a peer for review.
jsFiddle is a shell editor that eases writing JavaScript code by creating a custom environment based on popular JS frameworks. You can select the framework & the version of your choice (MooTools, jQuery, Dojo, Prototype, YUI, Glow, Vanilla). Also, if there is, you can add a complementary framework like jQuery UI or MooTools. A great feature is the ability to save & share the code created with a unique URL generated. Optionally, jsFiddle has an embedding feature too. It is an almost perfect platform for trying & sharing your JavaScript code without the need for a website.
Dabblet is an interactive playground for quickly testing snippets of CSS and HTML code. It uses -a prefix-free format so that you won't have to add any prefixes in your CSS code. You can save your work in Github gists, embed it in other websites, and share it with others. It currently only supports modern versions of Chrome, Safari, and Firefox. All posted code belongs to the poster and no license is enforced. Dabblet itself is open-source software and is distributed under an NPOSL-3.0 license.
CodePen is a playground for the front-end side of the web. It's all about inspiration, education, and sharing. The service highlights popular demonstrations ("Pens") and offers advanced functionality such as sharing and embedding. CodePen is great for building a reduced test case to demonstrate and figure out a bug.
CSSDesk is an Online CSS Sandbox. It allows people to quickly test snippets of CSS code, and watch the result appear live. There are line numbers, and syntax highlighting appears in the text box as you type. One of the greatest things is that it allows users to share their code with others.
Google's Code Playground is a web-based tool that lets web developers try out all of the APIs that Google provides, tweak the code, and see the results. Google's Code Playground lets you play around without opening an external editor, and all of the APIs are loaded for you in the Pick an API box
Editr is an HTML, CSS, and JavaScript playground that you can host on your server. It is based on ACE Editor. It is super easy to set up. It supports multiple instances on one page. Configurations are available via JS object or HTML attributes. Editr supports 3 layout views: horizontal, vertical, and single. The first two are for live edit. The third one is for presentation. Editr is licensed under MIT License.
Liveweave is an HTML5, CSS3 & JavaScript playground and a real-time editor for web designers and developers. It is a great tool to test, practice, and share your creations. It has resizable panels so that you can write your code (or weave, as we call it) the way you want. Liveweave also has built-in context-sensitive code-hinting for HTML5 and CSS3 tags/attributes that makes life a lot easier.
The D3.js Playground is designed to allow you to play with the D3.js library interactively. Every edit made (that results in invalid code) affects the playground in real-time. Because CSS is such an important part of visualizations, you can edit CSS live, too.
The HTML5 Playground includes a library of code snippets you can explore to see HTML5 in action. They include some basic getting-started examples, such as the use of the HTML5 Doctype and the audio tag (which nevertheless is a good demo of the playback features in a compatible browser). There's an interactive form, including HTML5 elements such as range and date inputs and automated validation for email addresses and websites.
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