I have the following code in a simple Bootstrap html file which displays a Chart.js chart.
this is chart.html
<head>
<meta charset="utf-8" />
<title>Chart.js </title>
<!-- import plugin script -->
<script src='app/static/js/Chart.min.js'></script>
</head>
<body>
<div class="chartjs">
<h1>Flask Chart.js</h1>
<!-- bar chart canvas element -->
<canvas id="chart" width="600" height="400"></canvas>
</div>
<script>
// bar chart data
var barData = {
labels : [{% for item in labels %}
"{{item}}",
{% endfor %}],
datasets : [
{
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)",
bezierCurve : false,
data : [{% for item in values %}
{{item}},
{% endfor %}]
}]
}
Chart.defaults.global.animationSteps = 50;
Chart.defaults.global.tooltipYPadding = 16;
Chart.defaults.global.tooltipCornerRadius = 0;
Chart.defaults.global.tooltipTitleFontStyle = "normal";
Chart.defaults.global.tooltipFillColor = "rgba(0,0,0,0.8)";
Chart.defaults.global.animationEasing = "easeOutBounce";
Chart.defaults.global.responsive = false;
Chart.defaults.global.scaleLineColor = "black";
Chart.defaults.global.scaleFontSize = 16;
// get bar chart canvas
var mychart = document.getElementById("chart").getContext("2d");
steps = 10
max = 10
// draw bar chart
var LineChartDemo = new Chart(mychart).Line(barData, {
scaleOverride: true,
scaleSteps: steps,
scaleStepWidth: Math.ceil(max / steps),
scaleStartValue: 0,
scaleShowVerticalLines: true,
scaleShowGridLines : true,
barShowStroke : true,
scaleShowLabels: true,
bezierCurve: false,
});
</script>
</body>
the direction of Chart.min.js
it turns out the chart.js doesn't work
this is part of views.py which is concern with chart.html
@main.route('/chart', methods=['GET', 'POST'])
def chart():
labels = ["January","February","March","April","May","June","July","August"]
values = [10,9,8,7,6,4,7,8]
return render_template('chart.html', values=values, labels=labels)
I doubt if the js was not referenced correctly and there was something wrong with the chart.html.
