ElementUI中使用ECharts

一、引入ECharts

2.1、直接引入echarts (安装echarts项目依赖)

npm install echarts --save

2.2、全局引入

(我们安装完成之后，可以在main.js中全局引入 echarts)

import echarts from "echarts";
Vue.prototype.$echarts = echarts;

2.3、我们可以将Echar封装成组件的形式，方便调用

封装在组件中：封装成 Echarts.vue 文件放在ElementUI前端框架中

<template>
  <div ref="chartDom" ></div>
</template>

<script>
import * as echarts from 'echarts';
import debounce from "lodash/debounce";
import { addListener, removeListener} from "resize-detector";

export default {
  props: {
    option: {
      type: Object,
      default: ()=> {}
    }
  },
  watch: {
    // option(val) {
    //   this.chart.setOption(val);
    // },
    option: {
      handler(val) {
        this.chart.setOption(val);
      },
      deep: true
    }
  },
  created() {
    this.resize = debounce(this.resize, 300);
  },
  mounted() {
    this.renderChart();
    addListener(this.$refs.chartDom, this.resize);
  },
  beforeDestroy() {
    removeListener(this.$refs.chartDom, this.resize);
    this.chart.dispose();
    this.chart = null;
  },
  methods:{
    resize(){
      this.chart.resize();
    },
    renderChart() {
      this.chart = echarts.init(this.$refs.chartDom);
      this.chart.setOption(this.option);
    }
  },
}
</script>
<style>
</style>

2.4、此时我们可以通过Echart官网引入我们需要的图

Echart官网 https://echarts.apache.org/zh/index.html

例如：以所选的折柱混合图为例

引入（需要引入Echarts刚刚封装好的组件）

从Echart官网获取对应图的代码

引入代码：

<template>
    <div>
        <el-row>
          <Echarts :option="option" style="height: 400px;width: 630px" />
        </el-row>
  </div>
</template>

<script>
    
//引入Echart的包
import Echarts from "../../components/charts/Echarts";       
export default {
  components:{
    Echarts,
  },
  data(){
    return{
      option:{
  		tooltip: {
    	trigger: 'axis',
    	axisPointer: {
      	type: 'cross',
      	crossStyle: {
        color: '#999'
      }
    }
  },
  toolbox: {
    feature: {
      dataView: { show: true, readOnly: false },
      magicType: { show: true, type: ['line', 'bar'] },
      restore: { show: true },
      saveAsImage: { show: true }
    }
  },
  legend: {
    data: ['Evaporation', 'Precipitation', 'Temperature']
  },
  xAxis: [
    {
      type: 'category',
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      axisPointer: {
        type: 'shadow'
      }
    }
  ],
  yAxis: [
    {
      type: 'value',
      name: 'Precipitation',
      min: 0,
      max: 250,
      interval: 50,
      axisLabel: {
        formatter: '{value} ml'
      }
    },
    {
      type: 'value',
      name: 'Temperature',
      min: 0,
      max: 25,
      interval: 5,
      axisLabel: {
        formatter: '{value} °C'
      }
    }
  ],
  series: [
    {
      name: 'Evaporation',
      type: 'bar',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
        2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3
      ]
    },
    {
      name: 'Precipitation',
      type: 'bar',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
        2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3
      ]
    },
    {
      name: 'Temperature',
      type: 'line',
      yAxisIndex: 1,
      tooltip: {
        valueFormatter: function (value) {
          return value + ' °C';
        }
      },
      data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]
    }
  ]
};
  },
  created: function () {

  },
  methods:{
      
  }
}
</script>
<style scoped>
</style>

二、效果展示