谷歌浏览器内核Cef js代码整理(二) 滚动条

1.隐藏滚动条

document.documentElement.style.overflow = 'hidden';
隐藏竖向滚动条:
document.documentElement.style.overflow = 'hidden';

1.滚动方法

window.scrollTo(0,0);       /*滚动到顶部*/

window.scrollBy(0,100);   /*向下滚动100*/

window.scrollTo(0,document.body.scrollHeight); /*滚动到底部*/

2.滚动条是否滚动到底部?是,返回true;否,返回当前垂直滚动条位置。

function getScrollTop(){
  var scrollTop = 0, bodyScrollTop = 0, documentScrollTop = 0;
  if(document.body){
    bodyScrollTop = document.body.scrollTop;
  }
  if(document.documentElement){
    documentScrollTop = document.documentElement.scrollTop;
  }
  scrollTop = (bodyScrollTop - documentScrollTop > 0) ? bodyScrollTop : documentScrollTop;
  return scrollTop;
};
function getScrollHeight(){
  var scrollHeight = 0, bodyScrollHeight = 0, documentScrollHeight = 0;
  if(document.body){
    bodyScrollHeight = document.body.scrollHeight;
  }
  if(document.documentElement){
    documentScrollHeight = document.documentElement.scrollHeight;
  }
  scrollHeight = (bodyScrollHeight - documentScrollHeight > 0) ? bodyScrollHeight : documentScrollHeight;
  return scrollHeight;
};
function getWindowHeight(){
  var windowHeight = 0;
  if(document.compatMode == "CSS1Compat"){
    windowHeight = document.documentElement.clientHeight;
  }else{
    windowHeight = document.body.clientHeight;
  }
  return windowHeight;

};

function IsScrollToBottom(){

if(getScrollTop() + getWindowHeight() == getScrollHeight()){ 
    alert("true");
  } else {
     alert(getScrollTop() + getWindowHeight());
  }
}

IsScrollToBottom();

3./*----------1秒向下滚动一次,直至到底部---------*/
var timer = setInterval(function(){  
            window.scrollBy(0,100);  
            if(getScrollTop() + getWindowHeight() == getScrollHeight()){  
                clearInterval(timer);  
            }

},1000);

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