我刚刚学习 Chart.js 的工作原理，因此我直接使用了 Chart.js API 页面上的示例代码，但它似乎不起作用。我将以下代码放入脚本标记中，并收到“无法读取未定义的属性‘标签’”错误。不确定这个错误意味着什么
$(function () {
var ctx = $('#myCanv').get(0).getContext("2d");
var myRadarChart = new Chart(ctx).Radar(data, options);
var data = {
labels: ["Eating", "Drinking", "Sleeping", "Designing", "Coding", "Cycling", "Running"],
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: [65, 59, 90, 81, 56, 55, 40]
},
{
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: [28, 48, 40, 19, 96, 27, 100]
}
]
};
var options = {
//Boolean - Whether to show lines for each scale point
scaleShowLine: true,
//Boolean - Whether we show the angle lines out of the radar
angleShowLineOut: true,
//Boolean - Whether to show labels on the scale
scaleShowLabels: false,
// Boolean - Whether the scale should begin at zero
scaleBeginAtZero: true,
//String - Colour of the angle line
angleLineColor: "rgba(0,0,0,.1)",
//Number - Pixel width of the angle line
angleLineWidth: 1,
//String - Point label font declaration
pointLabelFontFamily: "'Arial'",
//String - Point label font weight
pointLabelFontStyle: "normal",
//Number - Point label font size in pixels
pointLabelFontSize: 10,
//String - Point label font colour
pointLabelFontColor: "#666",
//Boolean - Whether to show a dot for each point
pointDot: true,
//Number - Radius of each point dot in pixels
pointDotRadius: 3,
//Number - Pixel width of point dot stroke
pointDotStrokeWidth: 1,
//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
pointHitDetectionRadius: 20,
//Boolean - Whether to show a stroke for datasets
datasetStroke: true,
//Number - Pixel width of dataset stroke
datasetStrokeWidth: 2,
//Boolean - Whether to fill the dataset with a colour
datasetFill: true,
//String - A legend template
legendTemplate: "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
};
});
