Relay vs winjs: What are the differences?

Relay: A JavaScript Framework for Building Data-Driven React Applications, by Facebook. Never again communicate with your data store using an imperative API. Simply declare your data requirements using GraphQL and let Relay figure out how and when to fetch your data; winjs: A UI toolkit for modern browsers, by Microsoft. WinJS is a set of JavaScript toolkits that allow developers to build applications using HTML/JS/CSS technology forged with the following principles in mind: 1. Provide developers with a distinctive set of UI controls with high polish and performance with fundamental support for touch, mouse, keyboard and accessibility 2. Provide developers with a cohesive set of components and utilities to build the scaffolding and infrastructure of their applications'.

Relay and winjs belong to "Javascript UI Libraries" category of the tech stack.

Relay and winjs are both open source tools. Relay with 13.1K GitHub stars and 1.29K forks on GitHub appears to be more popular than winjs with 4.07K GitHub stars and 504 GitHub forks.