Creating a JavaScript client to access our robot car's sensory data

The index.js file we created contains functions that subscribe our HTML JavaScript client to the distance topic:

function subscribeDistanceData() {
    client = new Paho.MQTT.Client("m10.cloudmqtt.com", 38215, "web_" + parseInt(Math.random() * 100, 10));

    // set callback handlers
    client.onConnectionLost = onConnectionLost;
    client.onMessageArrived = onMessageArrived;
    var options = {
        useSSL: true,
        userName: "vectydkb",
        password: "ZpiPufitxnnT",
        onSuccess: onsubsribeDistanceDataSuccess,
        onFailure: doFail
    }

    // connect the client
    client.connect(options);
}

function onsubsribeDistanceDataSuccess() {
    client.subscribe("distance");
    alert("Subscribed to distance data");
}

Similar to the code we wrote...