This module includes two core supports: Information flow loading and Image lazy loading. It is of great performance help for both the server and front-end experience. The methods of using these two technologies are given below:
1. Information flow loading
The core method of information flow loading is flow.load(options), Below is a chestnut that simulates loading a news list
Front-end html and js
<style> ul li { height: 200px; border: 5px solid green; font-size: 50px; line-height: 200px; text-align: center; } </style> <ul id="newsList"></ul> <!-- 条目中可以是任意内容,如:<img src=""> --> <script src="~/Content/layui/layui.js"></script> <script> layui.use('flow', function () { var $ = layui.jquery; //不用额外加载jQuery,flow模块本身是有依赖jQuery的,直接用即可。 var flow = layui.flow; flow.load({ elem: '#newsList' //指定列表容器 , isAuto: false //到底页面底端自动加载下一页,设为false则点击'加载更多'才会加载 //, mb: 100 //距离底端多少像素触发auto加载 , isLazying: true //当单个li很长时,内部有很多图片,对图片进行懒加载,默认false。 , end: '<p style="color:red">木有了</p>' //加载所有后显示文本,默认'没有更多了' , done: function (page, next) { //到达临界,触发下一页 var lis = []; $.get('/Home/GetList?page=' + page, function (res) { //假设你的列表返回在data集合中 layui.each(res.data, function (index, item) { lis.push('<li>' + item + '</li>'); }); next(lis.join(''), page < res.pages);//pages是后台返回的总页数 }); } }); }); </script>
Backend server code
public class HomeController : Controller { // GET: Home public ActionResult Index() { return View(); } public ActionResult GetList(int page) { //简单数据库中新闻 List<string> newsList = new List<string>(); for (int i = 0; i < 55; i++) { newsList.Add("新闻" + i); } //总页数 int pages =(int) Math.Ceiling((double)55 / 10); //模拟分页 var data= newsList.Skip<string>((page - 1) * 10).Take(10); return Json(new { data,pages},JsonRequestBehavior.AllowGet); } }
2. Lazy loading of pictures
Lazy loading of images in layui is very simple, just replace the src attribute of the image with lay-src, and then call the flow.lazyimg() method
layui.use('flow', function(){ var flow = layui.flow; //当你执行这样一个方法时,即对页面中的全部带有lay-src的img元素开启了懒加载 flow.lazyimg(); //方式一,全部懒加载 flow.lazyimg({ //方式二,特定容器懒加载 elem:'#box1' //不设置elem,对页面中所有图片进行懒加载 ,scrollElem:document }) });
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