ReactEcharts在react中报错

Question

ReactEcharts报错，哪位大神能帮看一下

import React from 'react';
import ReactEcharts from 'echarts-for-react';

import 'styles/common.less';
import './root.less';

class Root extends React.Component {
    componentDidMount() {

    }
    randomData = ()=> {
        return Math.round(Math.random()*1000);
    }
    getOption = ()=> {
        const option = {
            title: {
                text: 'iphone销量',
                subtext: '纯属虚构',
                left: 'center'
            },
            tooltip: {
                trigger: 'item'
            },
            legend: {
                orient: 'vertical',
                left: 'left',
                data:['iphone3','iphone4','iphone5']
            },
            visualMap: {
                min: 0,
                max: 2500,
                left: 'left',
                top: 'bottom',
                text: ['高','低'],           // 文本，默认为数值文本
                calculable: true
            },
            toolbox: {
                show: true,
                orient: 'vertical',
                left: 'right',
                top: 'center',
                feature: {
                    dataView: {readOnly: false},
                    restore: {},
                    saveAsImage: {}
                }
            },
            series: [
                {
                    name: 'iphone3',
                    type: 'map',
                    mapType: 'china',
                    roam: false,
                    label: {
                        normal: {
                            show: true
                        },
                        emphasis: {
                            show: true
                        }
                    },
                    data:[
                        {name: '北京',value: this.randomData() },
                        {name: '天津',value: this.randomData() },
                        {name: '上海',value: this.randomData() },
                        {name: '重庆',value: this.randomData() },
                        {name: '河北',value: this.randomData() },
                        {name: '河南',value: this.randomData() },
                        {name: '云南',value: this.randomData() },
                        {name: '辽宁',value: this.randomData() },
                        {name: '黑龙江',value: this.randomData() },
                        {name: '湖南',value: this.randomData() },
                        {name: '安徽',value: this.randomData() },
                        {name: '山东',value: this.randomData() },
                        {name: '新疆',value: this.randomData() },
                        {name: '江苏',value: this.randomData() },
                        {name: '浙江',value: this.randomData() },
                        {name: '江西',value: this.randomData() },
                        {name: '湖北',value: this.randomData() },
                        {name: '广西',value: this.randomData() },
                        {name: '甘肃',value: this.randomData() },
                        {name: '山西',value: this.randomData() },
                        {name: '内蒙古',value: this.randomData() },
                        {name: '陕西',value: this.randomData() },
                        {name: '吉林',value: this.randomData() },
                        {name: '福建',value: this.randomData() },
                        {name: '贵州',value: this.randomData() },
                        {name: '广东',value: this.randomData() },
                        {name: '青海',value: this.randomData() },
                        {name: '西藏',value: this.randomData() },
                        {name: '四川',value: this.randomData() },
                        {name: '宁夏',value: this.randomData() },
                        {name: '海南',value: this.randomData() },
                        {name: '台湾',value: this.randomData() },
                        {name: '香港',value: this.randomData() },
                        {name: '澳门',value: this.randomData() }
                    ]
                },
                {
                    name: 'iphone4',
                    type: 'map',
                    mapType: 'china',
                    label: {
                        normal: {
                            show: true
                        },
                        emphasis: {
                            show: true
                        }
                    },
                    data:[
                        {name: '北京',value: this.randomData() },
                        {name: '天津',value: this.randomData() },
                        {name: '上海',value: this.randomData() },
                        {name: '重庆',value: this.randomData() },
                        {name: '河北',value: this.randomData() },
                        {name: '安徽',value: this.randomData() },
                        {name: '新疆',value: this.randomData() },
                        {name: '浙江',value: this.randomData() },
                        {name: '江西',value: this.randomData() },
                        {name: '山西',value: this.randomData() },
                        {name: '内蒙古',value: this.randomData() },
                        {name: '吉林',value: this.randomData() },
                        {name: '福建',value: this.randomData() },
                        {name: '广东',value: this.randomData() },
                        {name: '西藏',value: this.randomData() },
                        {name: '四川',value: this.randomData() },
                        {name: '宁夏',value: this.randomData() },
                        {name: '香港',value: this.randomData() },
                        {name: '澳门',value: this.randomData() }
                    ]
                },
                {
                    name: 'iphone5',
                    type: 'map',
                    mapType: 'china',
                    label: {
                        normal: {
                            show: true
                        },
                        emphasis: {
                            show: true
                        }
                    },
                    data:[
                        {name: '北京',value: this.randomData() },
                        {name: '天津',value: this.randomData() },
                        {name: '上海',value: this.randomData() },
                        {name: '广东',value: this.randomData() },
                        {name: '台湾',value: this.randomData() },
                        {name: '香港',value: this.randomData() },
                        {name: '澳门',value: this.randomData() }
                    ]
                }
            ]
        };
        return option;
    }
    render() {

        return (
            <div className="root">
                <ReactEcharts option={this.getOption()} theme={'my_theme'} />
            </div>
        );
    }
}
export default Root;