Poor man's recorder - to be used in browsers dev tools; start with recorder.record(); and stop with recorder.stop();

mediarecorder.js

let recorder = await navigator.mediaDevices
  .getUserMedia({ audio: true })
  .then((mediaSourceObject) => {
    document.createElement("audio").srcObject = mediaSourceObject;
    const recorder = new MediaRecorder(mediaSourceObject);
    let data = [];
    recorder.ondataavailable = (e) => data.push(e.data);
    recorder.onstop = () => {
      const blob = new Blob(data, { type: "audio/ogg" });
      data = [];
      console.log(window.URL.createObjectURL(blob));
    };
    return {
      record() {
        recorder.start();
      },
      stop() {
        recorder.stop();
      },
    };
  });