This project provides a constant-time string comparison algorithm for Node.js to prevent timing attacks, which are security vulnerabilities that can occur when comparing sensitive data like passwords or tokens. It's designed for Node.js developers who need a secure way to compare strings of potentially different lengths, especially those using Node.js versions below v6.6.0 where `crypto.timingSafeEqual` isn't available or doesn't handle strings of different lengths. The library improves upon existing solutions by combining the clean implementation of scmp with the secure comparison approach of secure-compare.