删除标签并在条形图的工具提示中仅显示值 [英] Remove the label and show only value in tooltips of a bar chart

问题描述

我正在使用

---

我要做的就是删除条形图工具提示中显示的标签.

  var ctx = document.getElementById("myChart");var myChart = new Chart(ctx，{类型:酒吧"，数据: {标签: [男人"，女性"，未知"]，数据集:[{标签:瑞典"，数据:[60、40、20]，背景颜色: ['rgba(158，216，202，0.75)'，'rgba(255，150，162，0.75)'，'rgba(160，160，160，0.75)']}，{标签:荷兰"，数据:[40，70，10]，背景颜色: ['rgba(158，216，202，0.5)'，'rgba(255，150，162，0.5)'，'rgba(160，160，160，0.5)']}，{数据:[33，33，34]，背景颜色: ['rgba(158，216，202，0.25)'，'rgba(255，150，162，0.25)'，'rgba(160，160，160，0.25)']}]}，选项: {工具提示:{回调:{标签:function(tooltipItem，data){返回data.datasets [tooltipItem.datasetIndex] .data [tooltipItem.index];}}}}});  

 < script src ="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.bundle.min.js</script>< canvas id ="myChart" width ="400" height ="200"></canvas>  

解决方案

只需使用带有空值的 title 选项.像这样:

 回调:{标题:function(tooltipItems，data){返回 '​​';}，标签:function(tooltipItem，data){var dataLabel ='';var label = data.labels [tooltipItem.index];返回data.datasets [tooltipItem.datasetIndex] .data [tooltipItem.index];}} 

请参见更新了jsfiddle

I am using ChartJS library to create charts. In the tooltip, I am showing the data value from the dataset I created. It works in case if the chart type is doughnut. Otherwise it doesn't work in case or bar or horizontalbar charts.

Whatever I do it shows the data with the labels.

Working JSFiddle of Doughnut Chart with data in tooltip.

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Working JSFiddle of Bar Chart with label + data in tooltip.

All I want to do is to remove the label shown in the tooltips of the bar chart.

var ctx = document.getElementById("myChart");

var myChart = new Chart(ctx, {
  type: 'bar',
  data: {
    labels: [
      "Men",
      "Women",
      "Unknown"
    ],
    datasets: [{
        label: 'Sweden',
        data: [60, 40, 20],
        backgroundColor: [
          'rgba(158, 216, 202, 0.75)',
          'rgba(255, 150, 162, 0.75)',
          'rgba(160, 160, 160, 0.75)'
        ]
      },
      {
        label: 'Netherlands',
        data: [40, 70, 10],
        backgroundColor: [
          'rgba(158, 216, 202, 0.5)',
          'rgba(255, 150, 162, 0.5)',
          'rgba(160, 160, 160, 0.5)'
        ]
      },
      {
        data: [33, 33, 34],
        backgroundColor: [
          'rgba(158, 216, 202, 0.25)',
          'rgba(255, 150, 162, 0.25)',
          'rgba(160, 160, 160, 0.25)'
        ]
      }
    ]
  },
  options: {
    tooltips: {
      callbacks: {
        label: function(tooltipItem, data) {
          return data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
        }
      }
    }
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.bundle.min.js"></script>

<canvas id="myChart" width="400" height="200"></canvas>

解决方案

just use the title option with an empty value. Like this:

callbacks: {
        title: function(tooltipItems, data) {
          return '';
        },
        label: function(tooltipItem, data) {
          var datasetLabel = '';
          var label = data.labels[tooltipItem.index];
          return data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
        }
      }

see updated jsfiddle

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