[window scroll] #javascript

window-scroll.md

use jquery

var scrollTop = $(window).scrollTop();
var scrollHeight = $(document).height();
var windowHeight = $(window).height();

if ((scrollTop + windowHeight) == scrollHeight) {
    console.log('scroll to bottom')
}

native js

窗口宽高 https://stackoverflow.com/a/8876069

var w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
var h = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);

上滚高度 https://stackoverflow.com/a/14384091, pageYOffset是scrollY的别名

var top  = window.pageYOffset || document.documentElement.scrollTop,
left = window.pageXOffset || document.documentElement.scrollLeft;    

文档高度 https://stackoverflow.com/a/5484623

var height = document.body.clientHeight;
var width = document.body.clientWidth;