Question

想要将％符号添加到chart.js的工具提示怎么办？

  var chart = new chart(ctx,{
   type:'bar',
   data : data
});

Answer 1

options : {
         tooltips: {
                  enabled: true,
                  mode: 'single',
                  callbacks: {
                           label: function (tooltipItems, data) {
                                return  tooltipItems.yLabel + " %";
                           }
                  }
         }

Answer 2

试试这个

＆＃13;

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js"></script>
</head>
<body>
<canvas id="myChart" width="600" height="400"></canvas>

    <script type="text/javascript">
        var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [{
        label: "First dataset",
        fillColor: "rgba(220,220,220,0.2)",
        strokeColor: "rgba(220,20,20,1)",
        pointColor: "rgba(220,20,20,1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(220,220,220,1)",
        data: [65, 59, 80, 81, 56, 55, 90]
    }, {
        label: "Third dataset",
        fillColor: "rgba(151,187,205,0.2)",
        strokeColor: "rgba(15,187,25,1)",
        pointColor: "rgba(15,187,25,1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(151,187,205,1)",
        data: [38, 55, 50, 65, 35, 67, 54]
    }]
};

var options = {
    // String - Template string for single tooltips
    tooltipTemplate: "<%if (label){%><%=label %>: <%}%><%= value + ' %' %>",
    // String - Template string for multiple tooltips
    multiTooltipTemplate: "<%= value + ' %' %>",
};

var ctx = document.getElementById("myChart").getContext("2d");

var myLineChart = new Chart(ctx).Line(data, options);
    </script>
</body>
</html>

＆＃13;

Answer 3

此代码也适用于饼图：

tooltips: {
    enabled: true,
    mode: 'single',
    callbacks: {
        label: function (tooltipItems, data) {
            var i = tooltipItems.index;
            return data.labels[i] + ": " + data.datasets[0].data[i] + " %";
        }
    } 
}

如何将文本或符号附加到chart.js的工具提示

3 个答案: