TLDR Web Dev · ARTICLES & TUTORIALS

BUILDING A LIGHTWEIGHT REACTIVE STATE MANAGER WITH JAVASCRIPT PROXIES

lorenstew.art6 min read

Summary from the TLDR Web Dev newsletter

You can build a lightweight reactive state management system using JavaScript Proxies, which automatically trigger UI updates whenever state changes without requiring external libraries. This article goes through a practical example of a media submission form where a Proxy intercepts property assignments (like `mediaStateProxy.video = "url"`) and automatically runs multiple UI update functions, removing the need to manually call update functions throughout the codebase.