navigator.mediaDevices  undefined

"start": "webpack-dev-server --config ./webpack.config.js --mode development --http --port 8889 --host rtc.test.cn",

when i use localhost:8889  is run 
use rtc.test.cn:8889   or use nginx proxy_pass to localhost:8889 and domain : rtc.test.cn
index.js:87 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'enumerateDevices')
