在angular中使用echarts插件，多个图标不能显示，echarts 折线配置项内容和展示

在angular中使用echarts插件，多个图标不能显示

        chartOption = {
    xAxis: {
        type: 'category',
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};

  chartOption3 = {
    xAxis: {},
    yAxis: {},
    series: [{
        data: [[20, 120], [50, 200], [40, 50]],
        type: 'line'
    }]
};

<div id="chartOption" echarts [options]="chartOption" class="demo-chart"></div>
<div id="chartOption3" echarts [options]="chartOption3" class="demo-chart"></div>