patch audioWorklet.addModule instance mode

When p5 runs in "instance mode" it can re-run preload multiple times, and will attempt to re-register the same AudioWorklet modules multiple times. This throws an error, but we can catch and return the promise anyway since the module has already been loaded.

Author: therewasaguy

src/audioWorklet/index.js

@@ -10,7 +10,10 @@ function loadAudioWorkletModules() {
   return Promise.all(moduleSources.map(function(moduleSrc) {
     const blob = new Blob([moduleSrc], { type: 'application/javascript' });
     const objectURL = URL.createObjectURL(blob);
-    return ac.audioWorklet.addModule(objectURL);
+    return ac.audioWorklet
+      .addModule(objectURL)
+      // in "p5 instance mode," the module may already be registered
+      .catch(() => Promise.resolve());
   }));
 }