1- 安装 echarts 依赖

npm install echarts -S

2- 创建图表全局引入
在main.js 中写

import echarts from 'echarts'
Vue.prototype.$echarts = echarts

3- 在对应的页面里面写echarts图表
示例

1，新建echarts_demo.vue

<template>
  <div id="myChart" :style="{width: '100%', height: '600px'}"></div>
</template>

<script>
export default {
  name: "hello",
  data() {
    return {
      msg: "Welcome to Your Vue.js App"
    };
  },
  mounted() {
    this.day_init();
  },
  methods: {
    //实现自适应
    day_init() {
      const self = this; //因为箭头函数会改变this指向，指向windows。所以先把this保存
       var todaypieId = document.getElementById("myEchart");
        if (!todaypieId) {
        return false;
      } else {
       setTimeout(() => {
        window.onresize = function() {
          //   self.chart = echarts.init(self.$refs.myEchart);
          self.chart_today = echarts.init(
            todaypieId
          );
          self.chart_today.resize();
        };
      }, 20);
      }
    
    },
    drawLine() {
      // 基于准备好的dom，初始化echarts实例
      let myChart = this.$echarts.init(document.getElementById("myChart"));
      // 绘制图表
      myChart.setOption({
        tooltip: {
          trigger: "axis",
          axisPointer: {
            // 坐标轴指示器，坐标轴触发有效
            type: "shadow" // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        legend: {
          data: [
            "西瓜",
            "菠萝",
            "苹果",
            "榴莲",
            "草莓",
            "橘子"
          ]
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            type: "category",
            data: ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
          }
        ],
        yAxis: [
          {
            type: "value"
          }
        ],
        series: [
          {
            name: "西瓜",
            type: "bar",
            data: [320, 332, 301, 334, 390, 330, 320]
          },
          {
            name: "菠萝",
            type: "bar",
            stack: "",
            data: [120, 132, 101, 134, 90, 230, 210]
          },
          {
            name: "苹果",
            type: "bar",
            stack: "",
            data: [220, 182, 191, 234, 290, 330, 310]
          },
          {
            name: "榴莲",
            type: "bar",
            stack: "",
            data: [150, 232, 201, 154, 190, 330, 410]
          },
          {
            name: "草莓",
            type: "bar",
            data: [862, 1018, 964, 1026, 1679, 1600, 1570],
            markLine: {
              lineStyle: {
                normal: {
                  type: "dashed"
                }
              },
              data: [[{ type: "min" }, { type: "max" }]]
            }
          },
          {
            name: "橘子",
            type: "bar",
            barWidth: 5,
            stack: "",
            data: [620, 732, 701, 734, 1090, 1130, 1120]
          }
        ]
      });
    }
  }
};
</script>

<style lang="less">
</style>

执行成功后会控制台会出现错误

由于echarts图形ID是由后台传输过来的，并且是根据图形数据一起传过来，出现了图形容器还未生成，但是数据已经来了，这样就会出现这个问题：找不到图形容器

解决办法

（1）如果图形数据和图形ID一起传输过来，先保证图形容器已存在，后生成图形；可以利用定时器延后图形数据

（2）可以将图形数据和图形ID分为两个请求接口，分别同步进行，先保证图形容器存在，然后再生成图形

代码添加判断

var pieId = document.getElementById(‘myChart’);
if (!pieId){
return false;
}
var pie = echarts.init(pieId)