自定义样式
随便试试
修改一下外边距, 加上圆角, 更改一下高度
<div id="demo1" class="xm-select-demo"></div>
<script>
var demo1 = xmSelect.render({
    el: '#demo1', 
    style: {
        marginLeft: '200px',
        borderRadius: '50px',
        height: '50px',
    },
    data: [
        {name: '张三', value: 1},
        {name: '李四', value: 2},
        {name: '王五', value: 3},
    ]
})
</script>
修改下拉框的最大高度
<div id="demo2" class="xm-select-demo"></div>
<script>
var demo2 = xmSelect.render({
    el: '#demo2', 
    height: '50px',
    data: [
        {name: '张三', value: 1},
        {name: '李四', value: 2},
        {name: '王五', value: 3},
    ]
})
</script>