layer弹窗第一次不居中。然后再点击就居中了。解决办法

方法一: 把弹窗事件写在layer.ready里面

             layer.ready(function() {
                  var index = layer.load(2);
                  layer.open({
                        type: 1,
                        title: false,
                        closeBtn: 0,
                        shadeClose: true,
                        area: ['200px', 'auto'],
                        content: '',
                   });
                   layer.close(index);
              });

方法二: 在成功以后修改样式

              layer.open({
                    type: 1,
                    title: false,
                    closeBtn: 0,
                    shadeClose: true,
                    area: ['200px', 'auto'],
                    content: '',
                    success:function(layero,index){
                    layer.style(index, {
                          top: '50%',
                          transform:'translateY(-50%)'
                   });
               }
             });

方法三: 写个固定的宽高

           layer.open({
                type: 1,
                title: false,
                closeBtn: 0,
                shadeClose: true,
                area: ['200px', '200px'],
                content: '',
           });

参考---https://blog.csdn.net/qq_33769914/article/details/97009173?spm=1001.2101.3001.6650.10&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-10.highlightwordscore&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-10.highlightwordscore