Unable to catch an error when creating an AudioWorklet

[JSmithOner]

I have an audio worklet that looks like this:

class CustomProcessor extends AudioWorkletProcessor {
  constructor() {
      super();
      // Create a reverb node
      this.reverbNode = new ReverbNode();
      // Connect the reverb node to the output
      this.reverbNode.connect(this.output);
    }

  process(inputs, outputs, parameters) {
    // Get the input and output
    const input = inputs[0];
    const output = outputs[0];

    // Loop through the input and output
    for (let channel = 0; channel < input.length; ++channel) {
      const inputChannel = input[channel];
      const outputChannel = output[channel];

      // Connect the input to the reverb node
      this.reverbNode.connect(inputChannel)

      // Loop through the samples
      for (let i = 0; i < inputChannel.length; ++i) {
        // Apply the reverb effect
        outputChannel[i] = this.reverbNode.process(inputChannel[i]);
      }
    }

    return true;
  }
}

registerProcessor('custom-processor', CustomProcessor);

This processor should not build on purpose.

So I get an expected error

Uncaught ReferenceError: ReverbNode is not defined
    at new CustomProcessor (fb60f14c-281b-4ba1-bec8-411400e34a80:5:27)

The problem now is I've tried adding try...catch around the code also I've turned my code in a usual promise with then()...catch(e)... but the error is still uncaught and I don't don't know how to catch it.

The creation process looks a bit like that

try {
  const audioWorkletProcessorBlob = new Blob([ processorCode ], { type: 'application/javascript' });
  await this.audioContext.audioWorklet.addModule(URL.createObjectURL(audioWorkletProcessorBlob))
  //I've tried the previous line with then...catch(e)
  this.audioWorkletNode = new AudioWorkletNode( this.audioContext, 'custom-processor' );
} catch(e) {}

UPDATE:

I was able to catch one level of error using this.audioWorkletNode.onprocessorerror but the error I get is an error thrown from AudioWorkletProcessor constructor which is better than nothing but the other error is still uncaught and I am not able at this point to catch it to get particular details of the error.

Thanks in advance

[padenot]

This repository is home to the Web Audio API specification.

Questions on how to do something with the Web Audio API are better suited to either Stack Overflow or the Web Audio API slack.

That said, this is an implementation issue, here's what Firefox says when logging the argument of onprocessorerror:

It has the correct message, line and column number, filename (here it's a blob that's why it's an uuid).

You can alternatively add a try {} catch (...) {} in the body of the ctor, that would also work.

Please file an issue on the browser vendor's issue tracker.

• WebKit (e.g. Safari): https://bugs.webkit.org/enter_bug.cgi?product=WebKit&component=Web%20Audio (WebKit bugzilla account needed).
• Blink (e.g. Chrome, Edge): https://new.crbug.com/ (Google account needed).

For reference, Gecko's (Firefox) issue tracker is at: https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Web%20Audio (GitHub or Mozilla Bugzilla account needed).

[JSmithOner]

Sorry I though it was the correct place. I guess I'll make a bug request and for the moment add different implementations based on browser. Best and Thanks again.