移动端遮罩层滚动时，禁止底部滑动

Posted 2022-11-27 web_hwg

参考文章

关键css：

body.modal-open 
    position: fixed;
    width: 100%;

关键js:

// 解决移动端弹出层滚动穿透问题
var ModalHelper = (function(bodyCls) 
    var scrollTop;
    return 
        afterOpen: function() 
            scrollTop = document.scrollingElement.scrollTop;
            document.body.classList.add(bodyCls);
            document.body.style.top = -scrollTop + 'px';
        ,
        beforeClose: function() 
            document.body.classList.remove(bodyCls);
            // scrollTop lost after set position:fixed, restore it back.
            document.scrollingElement.scrollTop = scrollTop;
        
    ;
)('modal-open');

DEMO