Most vendors of enterprise applications and cloud services have published their user experience (US) guidelines and entire design systems to enable third-party developers to build their add-on apps, the seamlessly integrate with their products. Most of them have also released open-source Javascript frameworks, providing ready-to use UI elements. Let's compare design systems for web apps from the most prominent vendors. In this first article we are going to take a look at SAP Fiori with OpenUI5, Salesforce Lightning Design System and Microsoft Design Language with the Office Fabric Javascript framework.

Most serious web applications are built with JavaScript user interface frameworks. There are tons of UI frameworks to choose from, but what are the differences? Which framework is better? This is the first post of a series of direct comparisons of the most notable HTML5 UI libraries for web applications in 2016.