This document summarizes a Cybozu Meetup event focused on frontend technologies. It discusses Cybozu's transition from traditional server-rendered web applications to single-page applications built with React. It also covers Cybozu's use of Closure Compiler, TypeScript, JSDoc, and other tools for JavaScript development. Best practices are shared around testing, linting, and integrating third-party code. Accessibility standards and strategies for securely embedding third-party code are also mentioned.