record.js

const timeout = 1000;
this.stream = await navigator.mediaDevices.getUserMedia({ audio: true });

const recorder = new MediaRecorder(this.stream);
recorder.addEventListener('dataavailable', ({ data }) => this.upload(data));
recorder.addEventListener('stop', () => {
    recorder.start();
    setTimeout(() => recorder.stop(), timeout);
});
recorder.start();
setTimeout(() => recorder.stop(), timeout);