LABjs
Loading And Blocking JavaScript
...By decoupling fetch from execute, it avoids the blocking behavior of traditional tags and helps reduce perceived load time. LABjs embraces a “load groups, then wait” model that makes dependency management clear without a separate build step. It’s designed to work across a wide range of browsers, including older ones, which is why it relies on robust feature detection and time-tested loading techniques. The library is intentionally small and framework-agnostic, so it can be dropped into almost any stack to orchestrate client-side assets more predictably.