Build an Online Classroom App with React

The guide explains how to build a React-based online classroom application using VideoSDK for video conferencing, shared whiteboard synchronization, messaging, moderation, and cloud recording, with Supabase handling authentication and room ownership. Teacher and student roles are determined server-side through signed VideoSDK tokens based on database ownership, ensuring that moderation permissions such as admitting participants or removing users cannot be assigned by client-side claims. The shared whiteboard is embedded through VideoSDK’s React hook and can be made read-only for students through a URL parameter, while Class and Lecture layouts are selected when rooms are created and support different participant arrangements without changing drawing permissions. Chat, hand-raising, and promotion state are distributed through persisted pub/sub messages that clients honor locally, whereas critical moderation remains protected by server-verified token permissions. The tutorial also covers recording configurations that prioritize the whiteboard and active speaker, secure deployment through Vercel serverless functions, prevention of secret exposure in client bundles, and troubleshooting for whiteboard startup, recording argument order, and the limits of client-enforced controls.

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