fix multi-instance launch bug #100

main-electron.js

@@ -149,10 +149,25 @@ function getFile(filePath, res, page404) {
 
 app.commandLine.appendSwitch("force-color-profile", "srgb");
 
+
+const gotTheLock = app.requestSingleInstanceLock();
+
+if (!gotTheLock) {
+    app.quit();
+} else {
+    app.on('second-instance', (event, commandLine, workingDirectory) => {
+        // Someone tried to run a second instance, we should focus our window.
+        if (win) {
+            if (win.isMinimized()) win.restore()
+            win.focus()
+        }
+    });
+
     // This method will be called when Electron has finished
     // initialization and is ready to create browser windows.
     // Some APIs can only be used after this event occurs.
     app.on("ready", createWindow);
+}
 
 // Quit when all windows are closed.
 app.on("window-all-closed", () => {