Chart.js is failing to display the chart when integrated with RequireJS

I have been attempting to display a chart using Chartjs and Requirejs, but unfortunately, it is not rendering properly and no error messages are being displayed. I am aware that I may be overlooking something simple due to fatigue, but I am unable to pinpoint the issue.

The code snippet in my HTML responsible for containing the canvas element for the chart is as shown below:

 <canvas id="canvas" height="450" width="600"></canvas>

This is how my Requirejs file looks like. My suspicion lies here regarding the problem:

require.config({
paths: {
    jquery: "jquery-2.1.1.min",
    bootstrap: "bootstrap.min",
    chartjs: "Chart.min"
},
shim: {
    bootstrap: {
        deps: ['jquery'],
        exports: 'Bootstrap'
    },
}
});

requirejs(['bootstrap'], function (Bootstrap) {
return {};
});


require(['chartjs'], function (Chart) {
// Utilize Chart.js functionalities here.
var randomScalingFactor = function () { return Math.round(Math.random() * 100) };
var lineChartData = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.2)",
            strokeColor: "rgba(220,220,220,1)",
            pointColor: "rgba(220,220,220,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(220,220,220,1)",
            data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.2)",
            strokeColor: "rgba(151,187,205,1)",
            pointColor: "rgba(151,187,205,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(151,187,205,1)",
            data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
        }
    ]

}

window.onload = function () {
    var ctx = document.getElementById("canvas").getContext("2d");
    window.myLine = new Chart(ctx).Line(lineChartData, {
        responsive: true
    });
}
// Chart.noConflict restores the Chart global variable to it's previous owner
// The function returns what was previously Chart, allowing you to reassign.
var chartjs = Chart.noConflict();

});

Answer №1

The situation you're describing may be due to the event handler assigned to window.onload not being triggered at all.

When RequireJS begins running the code in your require(['chartjs'] call, it's likely that the load event has already occurred. Consider using jQuery's ready or RequireJS' domReady.

Additionally, the following code snippet seems unusual:

requirejs(['bootstrap'], function (Bootstrap) {
return {};
});

If you are simply loading Bootstrap, you could simplify it to requirejs(['bootstrap']). Keep in mind that all loads are asynchronous, so this only instructs RequireJS to load Bootstrap at an unspecified time in the future.

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