You can try it by open this LIFF URL https://liff.line.me/1656984897-84oW2nrm via LINE.

LIFF QR

*To use sendMessage function, it requires to open the liff in talk room:

The app itself is hosing in vercel: https://svelte-liff-demo.vercel.app/

Once you've created a project and installed dependencies with npm install (or pnpm install or yarn),

Create .env file in root folder (use Environment variables for Vercel, AWS Amplify, etc), add variables as below:

VITE_LIFF_ID=16XXXXXXX-84xXxxXx

start a development server:

npm run dev

# or start the server and open the app in a new browser tab
npm run dev -- --open

To create a production version of your app:

npm run build