Customizing Echart tooltip appearance

I've integrated echart () into my Vue.js application, and I'm attempting to personalize the tooltip on a ring chart. However, I'm facing challenges in achieving this customization. My goal is to show my own JSON data in the tooltip when hovering over a specific color.

HTML code:

<ve-ring :data="OptionRingChart" :settings="chartSettings"></ve-ring>

Javascript code:

chartSettings: {
        itemStyle: {

          normal: {
            color: function (params) {
              var colorList = [
                'red', 'lightgreen'
              ];
              return colorList[params.dataIndex]
            }
          }

        },
        label: {
          normal: {
            show: false
          }
        },
        tooltip: {
          show: true,
          trigger: 'item',
          position: ['35%', '32%'],
          backgroundColor: 'implements',
          textStyle: {
            color: '#000000',
            fontStyle: 'normal',
            fontWeight: 'normal',
            fontFamily: 'sans-serif',
            fontSize: 55,
          },
        },
      },
OptionRingChart: {
        color: ['green', 'red'],

        columns: ['name', 'test'],
        rows: [
          { 'name': 'D', 'test': 1 },
          { 'name': 'C', 'test': 2 }
        ],
      },

Answer №1

Utilizing the tooltip.formatter will be essential for your needs.

var option = {
    tooltip: {
        show: true,
        trigger: 'item',
        formatter: function (a) {
            my_json_data = fetch_and_format_data()
            return `${my_json_data}`
        }
    }
}

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