Bluetooth web control led stripe

Was using the Happylighting application on android and I try to make a simple web application to control the led color, but can’t figure how to do it, and witch ‘gatt’ I’ve to request, I’m really new to bluetooth thing.

function onRequestBluetoothDeviceButtonClick() {
    navigator.bluetooth.requestDevice({
        filters: [{name:"QHM-0A0B"}],
    })
    .then(device => {
        // device.gatt.connect()
        console.log(device)
    }).then(server =>{
        console.log(server)
    })
    .catch(error => {
        console.log('Argh! ' + error);
    });
  }

I’ve seen this on api documention, but can’t figure witch service I’ need to request and how