Integrate Pre-Call Check in React

A precall experience is a crucial step in ensuring the performance of a video calling application by addressing potential technical issues before the call begins. This guide provides a step-by-step approach to integrating the precall feature, including checking and requesting permissions, rendering device lists, handling device changes, creating media tracks, testing microphones and speakers. By proactively addressing potential problems, developers can significantly enhance the user experience and prevent common pitfalls such as muted microphones, pixelated cameras, and laggy connections.