模拟点击触发 echarts 的 click 事件

手动触发 echarts 点击事件

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <script src="https://cdn.staticfile.org/echarts/4.7.0/echarts.min.js"></script>
    <script src="https://cdn.bootcss.com/jquery/1.9.1/jquery.min.js"></script>

    <style>
        .box {
            position: absolute;
            left: 0; top: 0;
            background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
            opacity: .5;
        }
    </style>
</head>
<body>
    <div id="app" style="width: 600px; height:400px;"></div>
    <div class='box' style="width: 600px; height:400px;"></div>
</body>

<script>
const myChart = echarts.init(document.getElementById('app'))

const option = {
    series: [{
        type: 'pie',
        radius: [25, 95],
        center: ['50%', 140],
        roseType: 'area',
        clockWise: false,
        itemStyle: { normal: { label: { formatter: ['{b}', '占比{d}%'].join('\n'), textStyle: { color: '#000', fontSize: 16 } }, } },
        data: [ { value: 5,  name: '其他类' }, { value: 10, name: '就业保障类' }, { value: 15, name: '城市建设类' }, { value: 25, name: '民政救济类' }, { value: 20, name: '市场监管类' }, { value: 35, name: '市容城管类' }, { value: 30, name: '公共安全类' }, { value: 40, name: '公安消防类' } ] 
    }]
}

myChart.setOption(option)

myChart.on('click', function (e) {
    alert('触发点击事件')
    console.log(20211112141957, e)
})


//////////////////////
// 模拟点击 - 核心代码 //
//////////////////////
document.querySelector('.box').addEventListener('click', e => {
    const evmousedown = document.createEvent('HTMLEvents')
    evmousedown.initEvent('mousedown', false, true)

    const evmouseup = document.createEvent('HTMLEvents')
    evmouseup.initEvent('mouseup', false, true)

    const evmouseclick = document.createEvent('HTMLEvents')
    evmouseclick.initEvent('click', false, true)

    for(const key in event) {
        try {
            evmouseclick[key] = event[key]
            evmousedown[key] = event[key]
            evmouseup[key] = event[key]
        } catch (err) { /* event 对象中部分属性是只读，忽略即可 */ }
    }

    // 事件触发的容器，即不是 #app 也不是 canvas，而是中间这个 div
    const container = myChart._dom.firstElementChild
    
    container.dispatchEvent(evmousedown)
    container.dispatchEvent(evmouseup)
    container.dispatchEvent(evmouseclick)
})
</script>
</html>