echarts 修改tooltip字体大小_echarts tooltip字体大小

效果图：

 代码示例：

import * as echarts from 'echarts';
 
var chartDom = document.getElementById('main');
var myChart = echarts.init(chartDom);
var option;
 
option = {
  title: {
    text: 'Referer of a Website',
    subtext: 'Fake Data',
    left: 'center'
  },
  tooltip: {
    trigger: 'item',
    position: function (p) {
      //其中p为当前鼠标的位置
      return [p[0] + 35, p[1] - 10];
    },
    textStyle: {
      fontSize: 30 // 字体大小
    },
    extraCssText: 'width:160px;height:100px;background:red;' // 背景色
  },
  legend: {
    orient: 'vertical',
    left: 'left'
  },
  series: [
    {
      name: 'Access From',
      type: 'pie',
      radius: '50%',
      data: [
        { value: 1048, name: 'Search Engine' },
        { value: 735, name: 'Direct' },
        { value: 580, name: 'Email' },
        { value: 484, name: 'Union Ads' },
        { value: 300, name: 'Video Ads' }
      ],
      emphasis: {
        itemStyle: {
          shadowBlur: 10,
          shadowOffsetX: 0,
          shadowColor: 'rgba(0, 0, 0, 0.5)'
        }
      }
    }
  ]
};
 
option && myChart.setOption(option);