Yahoo has announced its decision to halt the development of Yahoo User Interface library (YUI), its open-source JavaScript library for writing HTML application interfaces. In the announcement, the company cites the rise in popularity of Node.JS, which has changed how developers build HTML applications, as have recent changes in package management and web application frameworks. “The consequence of this evolution in web technologies is that large JavaScript libraries, such as YUI, have been receiving less attention from the community. Many developers today look at large JavaScript libraries as walled gardens they don’t want to be locked into. As a result, the number of YUI issues and pull requests we’ve received in the past couple of years has slowly reduced to a trickle. Most core YUI modules do not have active maintainers, relying instead on a slow stream of occasional patches from external contributors. Few reviewers still have the time to ensure that the patches submitted are reviewed quickly and thoroughly.” Nevertheless, it seems, YUI will be maintained for the foreseeable future, receiving critical fixes as they arise.