版本：9.1.1
缩小地图

可实现缩小地图效果
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <title>缩小地图</title>
    <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #map {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 100%;
        }

        .btn-group {
            position: absolute;
            top: 20px;
            left: 20px;
        }
    </style>
    <script src="https://delivery.mapmost.com/cdn/sdk/webgl/v9.1.1/mapmost-webgl-min.js"></script>
</head>

<body>
    <div id="map"></div>
    <div class="btn-group">
        <button onClick="mapZoomOut()">缩小地图</button>
    </div>
    <script>
        let map = new mapmost.Map({
            container: 'map',  
            style: '<your style url>' 
            center: [120.67400351817594, 31.321374251251726], 
            zoom: 16, 
            pitch: 59.48725112156901, 
            bearing: -54.10626584095007, 
            userId: '***', // 授权码
        });
        function mapZoomOut() {
           map.zoomOut()
        }
    </script>
</body>

</html>