用js去动态监测用户是否滑动到页面底部
vue写法
//滚动条在Y轴上的滚动距离
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;
}
//文档的总高度
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;
}
//浏览器视口的高度
function getWindowHeight(){
var windowHeight = 0;
if(document.compatMode == "CSS1Compat"){
windowHeight = document.documentElement.clientHeight;
}else{
windowHeight = document.body.clientHeight;
}
return windowHeight;
}
window.onscroll = function(){
if(getScrollTop() + getWindowHeight() == getScrollHeight()){
alert("已经到最底部了!!"); --这里要注意如果是要执行事件的话最好考虑到你的this的指向问题 不然容易找不到你的事件
}
};
此写法适用于移动端的上拉加载下一页,相对于插件而言,这种写法方便很多 插件毕竟是插件会有隐形的bug!!!