Step 2: Log in with QR

This step assumes Vylinejs is installed. QR login lets the application sign in without passing a LINE password to the library.

1. loginWithQR() starts the login flow.
2. In onReceiveQRUrl, show the URL as a QR code in your app. Vylinejs returns the URL but does not create or display the QR image.
3. In onPincodeRequest, show the PIN to the user so they can confirm it in LINE. After confirmation, the function returns an authenticated client.

import { loginWithQR } from "@nezumi0627/vylinejs";

const client = await loginWithQR({
	onReceiveQRUrl(url) {
		console.log("Render this URL as a QR code:", url);
	},
	onPincodeRequest(pin) {
		console.log("Enter this PIN in LINE:", pin);
	},
}, {
	device: "IOSIPAD",
});

console.log((await client.getMyProfile()).displayName);

The callback messages above are placeholders for your application's UI. The last line is a small check that login completed and the client can make an authenticated request.

Do not publish the login URL, PIN, auth token, or stored session. For a repeatable local example and session restore options, continue to the authentication guide.

Next step · 3Receive messagesPrevious step · 1Install Vylinejs

Maintainer signature: nezumi0627