javascript - 在 Chart.js 条形图(版本 3)中显示数据值

Question

关于这个主题有很多答案的线程 ( Show values on top of bars in chart.js )，但都是关于版本 2.x

• getDatasetMeta() 已被弃用: https://www.chartjs.org/docs/3.0.2/getting-started/v3-migration.html

• “datalabels”插件尚未移植到 3.x: https://github.com/chartjs/chartjs-plugin-datalabels

您找到任何可行的解决方案了吗？数据值如何显示在垂直条形图的顶部(或水平条形图旁边)？

Answer 1

您可以使用 datalabels 插件的测试版。

文档:https://v2_0_0-rc_1--chartjs-plugin-datalabels.netlify.app/

脚本标签:<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@2.0.0-rc/dist/chartjs-plugin-datalabels.min.js"></script>

安装命令:npm i chartjs-plugin-datalabels@next

实例:

<script src="https://cdn.jsdelivr.net/npm/chart.js@3.3.0/dist/chart.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@2.0.0-rc"></script>
<canvas id="myChart" width="850" height="520"></canvas>
<script>
  var ctx = document.getElementById('myChart');
  
  Chart.register(ChartDataLabels); // first way of registering the plugin, registers them for all your charts
  
  var myChart = new Chart(ctx, {
    type: 'bar',
    plugins: [ChartDataLabels], // second way of registering plugin, register plugin for only this chart
    data: {
      labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
      datasets: [{
        data: [12, 19, 3, 5, 2, 3],
        label: 'Advisor Closed MTD',
        backgroundColor: 'rgb(192,111,94)',
        barThickness: 25,
        datalabels: {
          color: '#FFCE56'
        }

      }],
    },
    options: {
      responsive: false,
      plugins: {
        datalabels: {
          anchor: 'end', // remove this line to get label in middle of the bar
          align: 'end',
          formatter: (val) => (`${val}%`),
          labels: {
            value: {
              color: 'blue'
            }
          }

        }
      }
    }
  });
</script>