How to Launch/Focus electron app from browser link? - node.js

Question

I need to launch the electron app or focus it ( if already launched ) from a browser link. I have searched and tried many solutions but not getting it to work, so if someone has any experience with it, can you please help?
Here is the code:
// Single instance app ==========
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 (mainWindow) {
if (mainWindow.isMinimized()) mainWindow.restore();
mainWindow.focus();
}
});
}
// Register private URI scheme for the current user when running for the first time
app.setAsDefaultProtocolClient('x-protocol');
When I try to launch using this code, I get the goTheLock value as false, but the second-instance event is not getting fired, not sure why.
Version Details:
platform: Windows 10
electron: 8.5.3
electron-builder: 21.2.0
Update:
I added a delay of 5 seconds before quitting the app inside !gotTheLock, and in that case, I'm getting the event.
const gotTheLock = app.requestSingleInstanceLock();
if (!gotTheLock) {
delay(5000); // 5 seconds delay
app.quit();
} else {
app.on('second-instance', (event, commandLine, workingDirectory) => {
// Someone tried to run a second instance, we should focus our window.
if (mainWindow) {
if (mainWindow.isMinimized()) mainWindow.restore();
mainWindow.focus();
}
});
}

Answer 1

I don't understand. If you want to launch the app from a browser link then why you're implementing a second-instance? second-instance will fire if you open an application for a second time.
like this,
const gotTheLock = app.requestSingleInstanceLock();
if (!gotTheLock) {
if (win) {
app.quit();
}
} else {
app.on('second-instance', (event, commandLine, workingDirectory) => {
if (win) {
win.show();
win.focus();
}
})
}