百度地图添加位置标注及点击事件

<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="utf-8">
        <title>添加点标记</title>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
        <meta http-equiv="X-UA-Compatible" content="IE=Edge">
        <style>
            body,
            html,
            #container {
                overflow: hidden;
                width: 100%;
                height: 100%;
                margin: 0;
                font-family: "微软雅黑";
            }
        </style>
        <script src="//api.map.baidu.com/api?type=webgl&v=1.0&ak=2jgRj4GqAH4vnrCipo80NR6I2Qy1uW2U"></script>
    </head>
    <body>
        <div id="container"></div>
    </body>
</html>
<script>
    var map = new BMapGL.Map('container');
    map.centerAndZoom(new BMapGL.Point(116.404, 39.928), 15);
    map.enableScrollWheelZoom(true);
    // 创建点标记
    var citys = [{
            'lng': '116.404',
            'lat': '39.925'
        },
        {
            'lng': '116.404',
            'lat': '39.915'
        }, {
            'lng': '116.385',
            'lat': '39.935'
        }, {
            'lng': '116.390',
            'lat': '39.920'
        }, {
            'lng': '116.404',
            'lat': '39.905'
        }
    ]
    
    for (let i = 0; i < citys.length; i++) {
        var pt = new BMapGL.Point(citys[i].lng, citys[i].lat);  
        var marker = new BMapGL.Marker(pt);
        map.addOverlay(marker);
            // 点标记添加点击事件    
        marker.addEventListener('click', function () {
        console.log(this.latLng)
            map.openInfoWindow(infoWindow,new BMapGL.Point(this.latLng.lng, this.latLng.lat)); // 开启信息窗口
        });
    }
    
    // 创建信息窗口
    var opts = {
        width: 200,
        height: 100,
        title: '故宫博物院'
    };
    var infoWindow = new BMapGL.InfoWindow('地址：北京市东城区王府井大街88号乐天银泰百货八层', opts);

</script>