How to create video and audio call using ionic2 or ionic3 using webrtc?

Ionic Framework ionic-v3
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How to create video and audio call using ionic2 or ionic3 using webrtc ?

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Real-time WebRTC video chat with Cordova, Ionic, Twilio and Parse: http://danielcampagnoli.com/webrtc-video-with-cordova-twilio-parse