jquery determines how the scroll bar reaches the bottom and the top

This article mainly introduced the jquery decision scroll bar reached the bottom and reached the top of the method, the need for friends can refer to the

The code is as follows: $ (document). Height ()//is the height of the entire page, $ (window). Height ()//is the height of the portion of the page that is currently visible to the browser. This size changes when you zoom in on the browser window, and the document is different to get the top, just get to the top of the scrolltop () ==0, and to get the bottom, just get the ScrollTop () >=$ (document). Height ()-$ (window). Height () can be known to have scrolled to the end; The code is as follows: $ (document). ScrollTop () Gets the distance between the vertical scrolling distance, the window top of the current scrolling place and the top of the page; $ ( Document). ScrollLeft () This is the distance to get the horizontal scroll bar; Example: The code is as follows: $ (document). Scroll (function () {$ ("#lb"). Text ($ (document) ScrollTop () ); }) <span id= "lb" style= "top:100px;left:100px;position:fixed;" ></span><!--a fixed span marker scrolling-->