cannot read property ''enumerateDevices' of undefined over http

I create asp.net web application and copy code from https://webrtc.github.io/samples/src/content/getusermedia/canvas/ and public project to iis link http://123.111.1.222/test/camera.aspx not wor开发者_如何学Goking is error

This is the error message Uncaught TypeError: Cannot read properties of undefined (reading 'enumerateDevices'

code here

    navigator.mediaDevices.enumerateDevices().then(gotDevices).catch(handleError);