Add implementation details for Electron

website/docs/going-further/electron.md

@@ -0,0 +1,26 @@
+---
+sidebar_position: 5
+title: Electron
+---
+
+# Electron
+
+WEBMIDI.js works fine inside [Electron](https://www.electronjs.org/) but you must make sure to 
+properly handle the permission request and permission check handlers from within the main process:
+
+```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;
+});
+```