如何询问浏览器是否允许音频设备，然后是否允许视频？

Question

我在解决它的过程中遇到了一些失败。

所以我认为值得分享我的解决方案。

https://stackblitz.com/edit/typescript-wfvqpl

Answer 1

      try {
        await navigator.mediaDevices.getUserMedia({
           audio:true,
        });
        log('audio is permited');
        try {
          let stream = await navigator.mediaDevices.getUserMedia({
            audio:true,
            video:true
          });
          log('video and audio is permited');

        } catch (e) {

           log('video is not permited');
        }

      } catch (e) {
        let videoConstraint = false;
      }