Safari Web Browser -> Settings -> Advanced -> Experimental feature support

Hi everyone,

I'm working with the MediaRecorder (W3C's Media Recorder API) and recording video and audio successfully via a web application.

Device: iPhone 6
iOS: 12.4.8

My questions to you all are:
  • Do the CSS Custom Properties and Values and MediaRecorder toggles need to be toggled on in Safari -> Settings -> Advanced -> Experimental features. For these web browser APIs to work?

  • If the answer to the first question is yes. Why does the CSS Custom Properties work and why does the Media Recorder API work?

  • Has iOS 12.4.8 enabled these features by default?

Safari Web Browser -> Settings -> Advanced -> Experimental feature support
 
 
Q