Multiple Instances of Google Visualizations Chart Inside Separate Divs [Followup]

Question

This is a followup to a question I've already asked on StackOverflow. So please make sure you read that one to get the whole picture:

Multiple Instances of Google Visualizations Chart Inside Separate Divs

So in an attempt to make this whole thing dynamic, I wrote the following code:

var containers = document.getElementsByClassName('gaugeWrapper');
    console.log(containers);
    google.load('visualization', '1', { packages: ['gauge'] });
    for(var i = 0; i < containers.length; i++) {
        var id = containers[i].getAttribute('id');
        var name = containers[i].getAttribute('data-name');
        var value = containers[i].getAttribute('data-value');
        google.setOnLoadCallback(function () { drawChart(id, name, value) });

    }

    function drawChart(id, name, value) {
        console.log(id);
        console.log(name);
        console.log(value);
        var data = google.visualization.arrayToDataTable([
          ['Label', 'Value'],
          [name, value]
        ]);

        var options = {
            width: 400, height: 120,
            redFrom: 90, redTo: 100,
            yellowFrom: 75, yellowTo: 90,
            minorTicks: 5
        };

        var chart = new google.visualization.Gauge(document.getElementById(id));
        chart.draw(data, options);
    }

This does not work. The problem is that the console outputs the data of the last div only. Which means that the function is being called 5 (containers.length) times with the same set of parameters.

UPDATE:

As per Ateszki's answer, here's my updated code:

    google.load('visualization', '1', { packages: ['gauge'] });     
    google.setOnLoadCallback(drawChart);

    function drawChart() {
        var containers = document.getElementsByClassName('gaugeWrapper');
        for (var i = 0; i < containers.length; i++) {

            var id = containers[i].getAttribute('id');
            var name = containers[i].getAttribute('data-name');
            var value = containers[i].getAttribute('data-value');

            var data = google.visualization.arrayToDataTable([
          ['Label', 'Value'],
          [name, value]
                ]);

            var options = {
                width: 400, height: 120,
                redFrom: 90, redTo: 100,
                yellowFrom: 75, yellowTo: 90,
                minorTicks: 5
            };
            var cont = document.getElementById(id);
            console.log(cont);
            var chart = new google.visualization.Gauge(cont);
            chart.draw(data, options);
        }
    }

Unfortunately, I still couldn't get it to work, yet. Now nothing renders on the screen, although my console.log's seem to output the right things...

Any explanations/suggestions?

Answer 1

Ok the following has solved the problem:

    google.load('visualization', '1', { packages: ['gauge'] });     
    google.setOnLoadCallback(drawChart);

    function drawChart() {

        var containers = $('.gaugeWrapper');
        containers.each(function (index, elem) {

            var id = $(elem).attr('id');
            var name = $(elem).data('name');
            var value = $(elem).data('value');

            var data = google.visualization.arrayToDataTable([
          ['Label', 'Value'],
          [name, value]
                ]);

            var options = {
                width: 400, height: 120,
                redFrom: 90, redTo: 100,
                yellowFrom: 75, yellowTo: 90,
                minorTicks: 5
            };
            var cont = document.getElementById(id);
            var chart = new google.visualization.Gauge(cont);
            chart.draw(data, options);
        });

I do not know how it differs from the code in the updated section of the question except for the fact that I am now using jQuery to grab the values I'm looking for...

Answer 2

The function that you are binding onload is overwriting the previous one.

Maybe you can store the values in another object and load them all at once in one function.