You can use digitalRead function and call it every 2- 3 seconds using
setInterval(function(){
digitalRead(pin,element_id);
}, 3000);
Inside digitalRead, make changes. So that when obj.value = “1”, you can run
window.open(url,'_blank'); //url is the webpage link
You’ll find the function over here https://cloud.boltiot.com/static/js/boltCommands.js
If you’re not familiar with javascript, then you need to start with basic programs and functions to get a grip. For that you can take help of this thread boltCommand.js - All functions explained - w/ Syntax and HTML samples 🦾