vue 引入 echarts 報(bào)錯(cuò)

在vue 里面引入echarts報(bào)錯(cuò)

我的操作過(guò)程
1、cnpm install echarts --save
2、在vue文件里引入

<template>
  <div class="hello">
    <div id="mychart"></div>
  </div>
</template>

<script>
import * as echarts from 'echarts';
export default {
  name: 'HelloWorld',
  data () {
    return {
      msg: 'Welcome to Your Vue.js App'
    }
  },
  mounted () {
    var myChart = echarts.init(document.getElementById('mychart'));
    // 繪制圖表
    myChart.setOption({
         tooltip: {
        trigger: 'item',
        formatter: "{a} <br/>: {c} (pttzztr%)"
    },
    legend: {
        orient: 'vertical',
        x: 'left',
        data:['直接訪問(wèn)','郵件營(yíng)銷(xiāo)','聯(lián)盟廣告','視頻廣告','搜索引擎']
    },
    series: [
        {
            name:'訪問(wèn)來(lái)源',
            type:'pie',
            radius: ['50%', '70%'],
            avoidLabelOverlap: false,
            label: {
                normal: {
                    show: false,
                    position: 'center'
                },
                emphasis: {
                    show: true,
                    textStyle: {
                        fontSize: '30',
                        fontWeight: 'bold'
                    }
                }
            },
            labelLine: {
                normal: {
                    show: false
                }
            },
            data:[
                {value:335, name:'直接訪問(wèn)'},
                {value:310, name:'郵件營(yíng)銷(xiāo)'},
                {value:234, name:'聯(lián)盟廣告'},
                {value:135, name:'視頻廣告'},
                {value:1548, name:'搜索引擎'}
            ]
        }
    ]
    });
  }
}
</script>
求大神指點(diǎn)