//命令行中输入
npm install axios --save

// main.js
import http from './http'
Vue.prototype.$http = http //挂载到原型上

 {
 "title": { "text": "简单饼状图" },
 "tooltip": {},
 "xAxis": {
  "data": ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"],
  "name": "产品"
 },
 "yAxis": {},
 "series": [{
  "name": "销量",
  "type": "bar",
  "data": [5, 20, 36, 10, 10, 20],
  "itemStyle": { 
   "normal": {
    "color": "hotpink"
   }
  }
 }]
}

<template>
 <div id="myChart" :style="{width: '800px', height: '400px'}"></div>
</template>

<script>
 export default {
 name: 'echarts',
 data() {
  return {
  msg: 'Welcome to Your Vue.js App',
  goods: {}
  }
 },
 mounted() {
  this.drawLine();
 },
 created() {
  this.$http.get('./static/dat.json').then(res => {
  const data = res.data;
  this.goods = data
  console.log(this.goods);
  console.log(Array.from(this.goods.xAxis.data));
  })
 },
 methods: {
  drawLine() {
  // 基于准备好的dom，初始化echarts实例
  let myChart = this.$echarts.init(document.getElementById('myChart'))
  // 绘制图表
  myChart.setOption({
   title: {}, //{text: '异步数据加载示例'},
   tooltip: {},
   xAxis: {
   data: [] //["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
   },
   yAxis: {},
   series: [{
   name: '销量',
   type: 'bar',
   data: [] //[5, 20, 36, 10, 10, 20]
   }]
  });
  this.$http.get("./static/dat.json") .then((res) => {
   const data = res.data;
   const list = data.series.map(good=>{
     let list = good.data;
     return [...list]
    })
    console.log(list);
    console.log(Array.from(...list));
   myChart.setOption({
    title: data.title,
    xAxis: [{
    data: data.xAxis.data
    }],
    series: [{
    name: '销量',
    type: 'bar',
    data: Array.from(...list) //[5, 20, 36, 10, 10, 20]
    }]
   });
   })
  }
 }
 }
</script>

 methods: {
  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({
   title: {}, //{text: '异步数据加载示例'},
   tooltip: {},
   xAxis: {
   data: [] //["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
   },
   yAxis: {},
   series: [{
   name: '销量',
   type: 'bar',
   data: [] //[5, 20, 36, 10, 10, 20]
   }]
  });
  //显示加载动画
  myChart.showLoading();

  this.$http.get("./static/dat.json").then((res) => {
   setTimeout(() => { //未来让加载动画效果明显,这里加入了setTimeout,实现3s延时
   const data = res.data;
   const list = data.series.map(good => {
    let list = good.data;
    return [...list]
   })
   console.log(list);
   console.log(Array.from(...list));
   myChart.hideLoading(); //隐藏加载动画
   myChart.setOption({
    title: data.title,
    xAxis: [{
    data: data.xAxis.data
    }],
    series: [{
    name: '销量',
    type: 'bar',
    data: Array.from(...list) //[5, 20, 36, 10, 10, 20]
    }]
   });
   }, 3000)
  })
  }
 }