前端代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
ul,
li {
list-style: none;
padding: 0;
margin: 0;
}
#news>li {
width: 600px;
border: 1px solid #000080;
border-radius: 5px;
font-size: 1.25rem;
margin: 0 auto;
text-align: center;
padding: 5px;
margin-top: 10px;
}
.btn {
width: 200px;
display: block;
margin: 0 auto;
margin-top: 20px;
font-size: 1.5rem;
padding: 10px;
background: #AFEEEE;
}
</style>
</head>
<body>
<ul id="news">
<!-- <li>新闻1</li>
<li>新闻2</li>
<li>新闻3</li>
<li>新闻4</li>
<li>新闻5</li> -->
</ul>
<button id="more" class="btn">加载更多</button>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script>
var $news = $("#news")
var $btn = $("#more")
var $len = 3;
var lock = true
$btn.on("click", function(){
if(!lock){
return
}
lock = false;
var $index = $news.children("li").length;
$.ajax({
url: "/loadMore",
type: "get",
data: {
len: $len,
index: $index
}
}).done(function(ret){
//appendHtml(ret)
console.log("done...");
console.log(ret)
appendHtml(ret)
lock = true
}).fail(function(){
console.log("服务器异常")
})
})
function appendHtml(news){
for(var i=0; i<news.length; i++){
var $newsList = $("<li>"+news[i]+"</li>")
$news.append($newsList)
}
}
</script>
</body>
</html>
后端router.js
app.get("/loadMore", function(req, res){
var len = req.query.len
var index = req.query.index
var news = []
for(var i=0; i<len; i++){
news[i] = "新闻" + (parseInt(index)+i+1)
}
res.send(news)
})
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