Refactoring mailcheck.js for Modularity and Testability

mailcheck.js is a lightweight JavaScript utility that detects common email domain typos by computing string similarity—primari using the Sift4 algorithm. While effective, its original monolithic structure posed challenges for long-term maintenance: tightly coupled logic, implicit dependencies, and limited test coverage. This article details a t ...

Posted on Fri, 22 May 2026 22:12:35 +0000 by atticus