移动端弹出模态框禁止页面滑动

开始我用的是

$('html,body').css('overflow','hidden');

后来发现在移动端有问题

$('html,body').css('overflow','hidden');

这样就ok了

好吧！到此为止本以为结束了，但是在移动端浏览器和微信浏览器中发现有问题（页面加载后的一次弹出模态框时，模态框下面的页面会跑到页面最顶部），最后移动端的解决办法如下：

var mo=function(e){e.preventDefault()};

/***禁止滑动***/
function stop(){
    document.body.style.overflow='hidden';
    document.addEventListener("touchmove",mo,false);//禁止页面滑动
}

/***取消滑动限制***/
function move(){
    document.body.style.overflow='';//出现滚动条
    document.removeEventListener("touchmove",mo,false);
}

上面方法解决了页面禁止滑动问题，但是问题来了，如果页面上有部分区域是需要滚动的该怎么解决？

var overscroll = function(el) {
  el.addEventListener('touchstart', function() {
    var top = el.scrollTop
      , totalScroll = el.scrollHeight
      , currentScroll = top + el.offsetHeight;
    //If we're at the top or the bottom of the containers
    //scroll, push up or down one pixel.
    //
    //this prevents the scroll from "passing through" to
    //the body.
    if(top === 0) {
      el.scrollTop = 1;
    } else if(currentScroll === totalScroll) {
      el.scrollTop = top - 1;
    }
  });
  el.addEventListener('touchmove', function(evt) {
    //if the content is actually scrollable, i.e. the content is long enough
    //that scrolling can occur
    if(el.offsetHeight < el.scrollHeight)
      evt._isScroller = true;
  });
}
overscroll(document.querySelector('.scroll'));
document.body.addEventListener('touchmove', function(evt) {
  //In this case, the default behavior is scrolling the body, which
  //would result in an overflow.  Since we don't want that, we preventDefault.
  if(!evt._isScroller) {
    evt.preventDefault();
  }
});

附上demo一个提供测试

<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title></title>
        <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
        <style type="text/css">
            * {
                margin: 0;
                padding: 0;
            }

            html,
            body {
                width: 100%;
                height: 100%;
                overflow: hidden;
            }

            body {
                display: flex;
                flex-direction: column;
            }

            header {
                width: 100%;
                height: 44px;
                background: black;
            }

            footer {
                width: 100%;
                height: 50px;
                background: black;
            }

            section {
                flex: 1;
                overflow: auto;
            }
        </style>
    </head>

    <body>
        <header>头</header>
        <section class="scroll">
            <div style=" 100%;min-height: 2000px;">内容滚动区域</div>
        </section>
        <footer>尾</footer>

        <script>
            var overscroll = function(el) {
                el.addEventListener('touchstart', function() {
                    var top = el.scrollTop,
                        totalScroll = el.scrollHeight,
                        currentScroll = top + el.offsetHeight
                        //If we're at the top or the bottom of the containers
                        //scroll, push up or down one pixel.
                        //
                        //this prevents the scroll from "passing through" to
                        //the body.
                    if(top === 0) {
                        el.scrollTop = 1
                    } else if(currentScroll === totalScroll) {
                        el.scrollTop = top - 1
                    }
                })
                el.addEventListener('touchmove', function(evt) {
                    //if the content is actually scrollable, i.e. the content is long enough
                    //that scrolling can occur
                    if(el.offsetHeight < el.scrollHeight)
                        evt._isScroller = true
                })
            }
            overscroll(document.querySelector('.scroll'));//允许滚动的区域
            document.body.addEventListener('touchmove', function(evt) {
                //In this case, the default behavior is scrolling the body, which
                //would result in an overflow.  Since we don't want that, we preventDefault.
                if(!evt._isScroller) {
                    evt.preventDefault()
                }
            })
        </script>
    </body>

</html>