The RTCCertificate interface of the WebRTC API provides an object representing a certificate that an RTCPeerConnection uses to authenticate.
RTCCertificate is a serializable object, so it can be cloned with structuredClone() or copied between Workers using postMessage().
RTCCertificate.expires Read onlyReturns the expiration date of the certificate.
RTCCertificate.getFingerprints()Returns an array of certificate fingerprints, calculated using the different algorithms supported by the browser.