滚动加载方法

/**

*

* @param {*} scrollClass

* @param {*} fn

* @param {*} preventLoad

* 滚动的元素

* 滚动回调方法

* 锁死滚动的方法

*/

var initScroll = function(scrollClass,fn){

var self = this;console.log(123)

 

var beforeScrollTop = document.body.scrollTop || document.documentElement.scrollTop;

document.getElementById(scrollClass).addEventListener('scroll', function(e){

 

var afterScrollTop = this.scrollTop || this.scrollTop,

windowHeight = window.innerHeight,

scrollHeight = this.scrollHeight,

delta = afterScrollTop - beforeScrollTop;

if( (afterScrollTop + windowHeight)/scrollHeight>=0.95 ){

(typeof fn=='function') && fn();

}

//将新的滑动距离赋值给上一次的滑动

beforeScrollTop = afterScrollTop;

})

}