MediaRecorder: error event

The MediaRecorder interface's error event is fired when an error occurs: for example because recording wasn't allowed or was attempted using an unsupported codec.

For details of the all the possible errors see the documentation for the event handler property: onerror.

Using addEventListener to listen for error events:

async function record() {
    const stream = await navigator.mediaDevices.getUserMedia({audio: true});
    const recorder = new MediaRecorder(stream);
    recorder.addEventListener('error', (event) => {
        console.error(`error recording stream: ${event.error.name}`)
    });
    recorder.start();
}

record();

The same, but using the onerror event handler property:

async function record() {
    const stream = await navigator.mediaDevices.getUserMedia({audio: true});
    const recorder = new MediaRecorder(stream);
    recorder.onerror = (event) => {
        console.error(`error recording stream: ${event.error.name}`)
    };
    recorder.start();
}

record();

• Using the MediaRecorder API