微信浏览器禁止页面下拉查看网址实例详解

微信浏览器禁止页面下拉查看网址实例详解

此类事件是手机touchmove默认事件行为，可以通过js代码隐藏事件：

$(‘body').on(‘touchmove', function (event) {event.preventDefault();});
or
document.addEventListener('touchmove', function(e){e.preventDefault()}, false);

但这样往往会把页面原生的scroll效果也一同去掉了，下面的代码可以完美解决这个问题：

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();
 }
});

详情见：https://github.com/luster-io/prevent-overscroll/blob/master/index.html

源码下载：http://xiazai.3water.com/201706/yuanma/preventoverscrollmaster(3water.com).rar

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