mutual text
WebRTC P2P Chat (Manual Signaling)
Step 1: One side creates an Offer → copy the SDP text and send to other side.
Step 2: Other side pastes the Offer and clicks "Accept Offer" → it will generate an Answer. Copy Answer back and paste into Offerer, click "Accept Answer". After exchange the DataChannel should open and chat works.
Notes: Uses WebRTC DataChannel with a public STUN server for NAT traversal. This simple manual-signaling method works for quick testing. For reliable public usage, host this file and use automatic signaling (server) or use a hosting service so users don't need to copy/paste SDPs.
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