Example code to achieve page pull-up loading effect

Bishe is finally over. I made a webApp and learned a lot from it. The page has a pull-up loading effect. I sorted it out today.

The implementation idea of ​​pull-up loading is actually very simple:

1. The mobile terminal triggers the touchmove event (pull-up)

2. Determine whether the last element has appeared at the bottom

3. If it appears, js adds elements to the end of the page

Idea map:

Then start writing the style:

html,body{
	margin: 0px;
	width: 100%;
	height: 100%;
}
li{
	list-style: none;
}
#personkit_article_ul{
	width: 100%;
	position: relative;
	-webkit-padding-start:0;
	-webkit-margin-before:0;
	-webkit-margin-after:0;
}
.pin{
	/*width: 100%;*/
	height: 90px;
	background-color: #eee;
	padding: 6px 8px;
	position: relative;
	border-bottom: 1px solid #fff;
}
.personkit-article__img{
	width: 116px;
	height: 90px;
}
.personkit-article__img img{
	width: 100%;
	height: 100%;
}
.personkit-article__info{
	position: absolute;	
	left: 130px;
	top: 0px;
	padding: 0px 8px;
}
.personkit-article__title{
	line-height: 0px;
}
/*多行文本溢出作省略处理*/
.personkit-article__info p{
	display: -webkit-box;
	overflow: hidden;
	text-overflow:ellipsis;
	-webkit-line-clamp:3;
	-webkit-box-orient:vertical;
}
.bottom-line{
	text-align: center;
	background-color: #eee;
}

html structure:

<section id="item">
	<ul id="personkit_article_ul">
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
		<li class="pin">
			<div class="personkit-article__img">
				<img src="../public/imgs/4.png" alt="">
			</div>
			<div class="personkit-article__info">
				<h3 class="personkit-article__title">关于保健的一本书</h3>
				<p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p>
			</div>
		</li>
	</ul>
	<div class="bottom-line"></div>
</section>

js is implemented using zepto.js library:

;(function(){
	$('#personkit_article_ul').on('touchmove',function(){
		//判断最后一个元素是否在底部之上
		if( $(&#39;.pin&#39;).eq($(&#39;.pin&#39;).length-1).offset().top-$(window).scrollTop() < $(window).height() ){
			$(&#39;.bottom-line&#39;).css(&#39;display&#39;,&#39;block&#39;).text(&#39;正在刷新...&#39;);
			checkPull();
		}
	});
	//添加元素方法
	function checkPull(){
		var pinNew;
		pinNew=document.createDocumentFragment();
		//每次添加5条内容
		for(var j=5;j>0;j--){
			var li=document.createElement(&#39;li&#39;);
			li.className="pin";
			li.innerHTML=&#39;<div class="personkit-article__img"><img src="../public/imgs/4.png" alt=""></div><div class="personkit-article__info"><h3 class="personkit-article__title">关于保健的一本书</h3><p>原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊原来保健是这样的啊</p></div>&#39;;
			pinNew.appendChild(li);
		}
		$(&#39;#personkit_article_ul&#39;)[0].appendChild(pinNew);
	}
})();

This effect is to simulate the mobile terminal. You can use Google Chrome - Mail during testing ——Inspect the element, click on the circled area above to see the effect

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