Handle request and check permissions

examples/electron/README.md

@@ -5,3 +5,25 @@ A collection of examples to use WEBMIDI.js inside an Electron application.
 ## Examples
 
 * [**Basic Electron Example**](basic-example)
+
+## Platform specific notes
+
+The permission requests must be properly handled in the main process before initializing WEBMIDI:
+
+```javascript
+  mainWindow.webContents.session.setPermissionRequestHandler((webContents, permission, callback, details) => {
+    if (permission === 'midi' || permission === 'midiSysex') {
+      callback(true);
+    } else {
+      callback(false);
+    }
+  })
+
+  mainWindow.webContents.session.setPermissionCheckHandler((webContents, permission, requestingOrigin) => {
+    if (permission === 'midi' || permission === 'midiSysex') {
+      return true;
+    }
+
+    return false;
+  });
+```