js捕捉下拉到底部
2018-07-07 本文已影响0人
Nick_4438
前言
通过js代码捕捉网页已经下拉到底部，触发一个js请求。
代码
<!DOCTYPE html>
<html>
<head>
<title>拉到底部测试</title>
<meta charset="gbk">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.item{
width: 300px;
height: 100px;
background: #333333;
margin-top: 10px;
}
</style>
<body>
<div data-role="page" data-theme="b">
<div data-role="header"></div>
<div data-role="content">
<script>
//文档高度
function getDocumentTop() {
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;
}
//可视窗口高度
function getWindowHeight() {
var windowHeight = 0;
if (document.compatMode == "CSS1Compat") {
windowHeight = document.documentElement.clientHeight;
} else {
windowHeight = document.body.clientHeight;
}
return windowHeight;
}
//滚动条滚动高度
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;
}
window.onscroll = function () {
console.log(getScrollHeight() +"=?" + getWindowHeight() +"+" + getDocumentTop())
if(getScrollHeight() == getWindowHeight() + getDocumentTop()){
console.log("底裤出来了")
}
}
</script>
<div class="list">
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item"></div>
</div>
</div>
</body>
</html>
执行效果
image.png
