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  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4. <meta charset="utf-8">
  5. <title>镜像站@流加载文档 - Layui</title>
  6. <meta name="renderer" content="webkit">
  7. <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  8. <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
  9. <meta name="apple-mobile-web-app-status-bar-style" content="black">
  10. <meta name="apple-mobile-web-app-capable" content="yes">
  11. <meta name="format-detection" content="telephone=no">
  12. <script>
  13. ;!function(){self!==parent&&(location.href="http://www.baidu.com/")}();
  14. </script>
  15. <link rel="stylesheet" href="/public/layui/dist/css/layui.css" tppabs="http://res.layui.com/layui/dist/css/layui.css?t=1632428048260" media="all">
  16. <link rel="stylesheet" href="/public/static/css/global.css" tppabs="http://res.layui.com/static/css/global.css?t=1632428048260-19" media="all">
  17. </head>
  18. <body>
  19. <div class="layui-header header header-doc" autumn>
  20. <div class="layui-container">
  21. <a class="logo" href="../../index.html" tppabs="http://www.layui.com/">
  22. <img src="/public/static/images/layui/logo.png" tppabs="http://res.layui.com/static/images/layui/logo.png" alt="layui">
  23. </a>
  24. <div class="layui-form layui-hide-xs component" lay-filter="LAY-site-header-component"></div>
  25. <div class="layui-hide-xs site-notice"></div>
  26. <ul class="layui-nav" id="LAY_NAV_TOP">
  27. <li class="layui-nav-item layui-this">
  28. <a href="../index.html" tppabs="http://www.layui.com/doc/">文档</a>
  29. </li>
  30. <li class="layui-nav-item ">
  31. <a href="../../demo/index.html" tppabs="http://www.layui.com/demo/">示例</a>
  32. </li>
  33. <li class="layui-nav-item">
  34. <a href="javascript:;">
  35. <!--<span class="layui-badge-dot" style="left:0; right: auto; margin: -4px 0 0 5px;"></span>-->
  36. 周边
  37. </a>
  38. <dl class="layui-nav-child layui-nav-child-c">
  39. <dd class="layui-hide-sm layui-show-xs" lay-unselect>
  40. <a href="https://gitee.com/sentsin/layui/issues" target="_blank" rel="nofollow">问题反馈</a>
  41. <hr>
  42. </dd>
  43. <dd lay-unselect><a href="../../alone.html" tppabs="http://www.layui.com/alone.html" target="_blank" lay-unselect>独立组件</a></dd>
  44. <dd lay-unselect><a href="../../../fly.layui.com/extend/index.html" target="_blank">扩展组件</a></dd>
  45. </dl>
  46. </li>
  47. <li class="layui-nav-item layui-hide-xs">
  48. <a href="http://gitee.com/sentsin/layui/issues" target="_blank" rel="nofollow">反馈</a>
  49. </li>
  50. </ul>
  51. </div>
  52. </div>
  53. <!-- 让IE8/9支持媒体查询,从而兼容栅格 -->
  54. <!--[if lt IE 9]>
  55. <script src="../../../other/html5shiv/r29/html5.min.js" tppabs="https://cdn.staticfile.org/html5shiv/r29/html5.min.js"></script>
  56. <script src="../../../other/respond.js/1.4.2/respond.min.js" tppabs="https://cdn.staticfile.org/respond.js/1.4.2/respond.min.js"></script>
  57. <![endif]-->
  58. <ul class="site-dir">
  59. <li><a href="#use"><cite>使用</cite></a></li>
  60. <li><a href="#load"><cite>信息流</cite></a></li>
  61. <li><a href="#lazyimg"><cite>图片懒加载</cite></a></li>
  62. </ul>
  63. <div class="layui-container layui-row">
  64. <div class="layui-col-md3">
  65. <div class="layui-panel site-menu">
  66. <ul class="layui-menu layui-menu-lg">
  67. <li class="layui-menu-item-group" lay-options="{type: 'group', isAllowSpread: true}">
  68. <div class="layui-menu-body-title">
  69. 基础说明
  70. </div>
  71. <hr>
  72. <ul>
  73. <li class="">
  74. <div class="layui-menu-body-title">
  75. <a href="../index.html" tppabs="http://www.layui.com/doc/">
  76. <span>开始使用 </span>
  77. <span class="layui-font-12 layui-font-gray">Getting Started</span>
  78. </a>
  79. </div>
  80. </li>
  81. <li class="">
  82. <div class="layui-menu-body-title">
  83. <a href="../base/infrastructure.html" tppabs="http://www.layui.com/doc/base/infrastructure.html">
  84. <span>底层方法 </span>
  85. <span class="layui-font-12 layui-font-gray">基础支撑</span>
  86. </a>
  87. </div>
  88. </li>
  89. <li class="">
  90. <div class="layui-menu-body-title">
  91. <a href="../base/element.html" tppabs="http://www.layui.com/doc/base/element.html">
  92. <span>页面元素 </span>
  93. <span class="layui-font-12 layui-font-gray">规范 公共类 属性</span>
  94. </a>
  95. </div>
  96. </li>
  97. <li class="">
  98. <div class="layui-menu-body-title">
  99. <a href="../base/modules.html" tppabs="http://www.layui.com/doc/base/modules.html">
  100. <span>模块规范 </span>
  101. <span class="layui-font-12 layui-font-gray">使用 扩展</span>
  102. </a>
  103. </div>
  104. </li>
  105. <li class="">
  106. <div class="layui-menu-body-title">
  107. <a href="../base/faq.html" tppabs="http://www.layui.com/doc/base/faq.html">
  108. <span>常见问题 </span>
  109. <span class="layui-font-12 layui-font-gray">FAQ</span>
  110. </a>
  111. </div>
  112. </li>
  113. <li class="">
  114. <div class="layui-menu-body-title">
  115. <a href="../base/changelog.html" tppabs="http://www.layui.com/doc/base/changelog.html">
  116. <span>更新日志 </span>
  117. <span class="layui-font-12 layui-font-gray">changelog</span>
  118. <span class="layui-badge-dot"></span>
  119. </a>
  120. </div>
  121. </li>
  122. </ul>
  123. </li>
  124. <li class="layui-menu-item-group" lay-options="{type: 'group', isAllowSpread: true}">
  125. <div class="layui-menu-body-title">
  126. 页面元素
  127. </div>
  128. <hr>
  129. <ul>
  130. <li class="">
  131. <div class="layui-menu-body-title">
  132. <a href="../element/layout.html" tppabs="http://www.layui.com/doc/element/layout.html">
  133. <span>布局 </span>
  134. <span class="layui-font-12 layui-font-gray">栅格 后台管理布局</span>
  135. </a>
  136. </div>
  137. </li>
  138. <li class="">
  139. <div class="layui-menu-body-title">
  140. <a href="../element/color.html" tppabs="http://www.layui.com/doc/element/color.html">
  141. <span>颜色 </span>
  142. <span class="layui-font-12 layui-font-gray">主色调 颜色搭配</span>
  143. </a>
  144. </div>
  145. </li>
  146. <li class="">
  147. <div class="layui-menu-body-title">
  148. <a href="../element/icon.html" tppabs="http://www.layui.com/doc/element/icon.html">
  149. <span>图标 </span>
  150. <span class="layui-font-12 layui-font-gray">iconfont 字体图标</span>
  151. </a>
  152. </div>
  153. </li>
  154. <li class="">
  155. <div class="layui-menu-body-title">
  156. <a href="../element/anim.html" tppabs="http://www.layui.com/doc/element/anim.html">
  157. <span>动画 </span>
  158. <span class="layui-font-12 layui-font-gray">内置 CSS3 动画</span>
  159. </a>
  160. </div>
  161. </li>
  162. <li class="">
  163. <div class="layui-menu-body-title">
  164. <a href="../element/button.html" tppabs="http://www.layui.com/doc/element/button.html">
  165. <span>按钮 </span>
  166. <span class="layui-font-12 layui-font-gray">button</span>
  167. </a>
  168. </div>
  169. </li>
  170. <li class="">
  171. <div class="layui-menu-body-title">
  172. <a href="../element/form.html" tppabs="http://www.layui.com/doc/element/form.html">
  173. <span>表单 </span>
  174. <span class="layui-font-12 layui-font-gray">form 元素集合</span>
  175. </a>
  176. </div>
  177. </li>
  178. <li class="">
  179. <div class="layui-menu-body-title">
  180. <a href="../element/nav.html" tppabs="http://www.layui.com/doc/element/nav.html">
  181. <span>导航 </span>
  182. <span class="layui-font-12 layui-font-gray">nav 面包屑</span>
  183. </a>
  184. </div>
  185. </li>
  186. <li class="">
  187. <div class="layui-menu-body-title">
  188. <a href="../element/menu.html" tppabs="http://www.layui.com/doc/element/menu.html">
  189. <span>菜单 </span>
  190. <span class="layui-font-12 layui-font-gray">menu 基础菜单</span>
  191. <span class="layui-badge-dot"></span>
  192. </a>
  193. </div>
  194. </li>
  195. <li class="">
  196. <div class="layui-menu-body-title">
  197. <a href="../element/tab.html" tppabs="http://www.layui.com/doc/element/tab.html">
  198. <span>选项卡 </span>
  199. <span class="layui-font-12 layui-font-gray">Tabs 切换</span>
  200. </a>
  201. </div>
  202. </li>
  203. <li class="">
  204. <div class="layui-menu-body-title">
  205. <a href="../element/progress.html" tppabs="http://www.layui.com/doc/element/progress.html">
  206. <span>进度条 </span>
  207. <span class="layui-font-12 layui-font-gray">progress</span>
  208. </a>
  209. </div>
  210. </li>
  211. <li class="">
  212. <div class="layui-menu-body-title">
  213. <a href="../element/panel.html" tppabs="http://www.layui.com/doc/element/panel.html">
  214. <span>面板 </span>
  215. <span class="layui-font-12 layui-font-gray">panel 卡片 折叠</span>
  216. </a>
  217. </div>
  218. </li>
  219. <li class="">
  220. <div class="layui-menu-body-title">
  221. <a href="../element/table.html" tppabs="http://www.layui.com/doc/element/table.html">
  222. <span>表格 </span>
  223. <span class="layui-font-12 layui-font-gray">静态 table</span>
  224. </a>
  225. </div>
  226. </li>
  227. <li class="">
  228. <div class="layui-menu-body-title">
  229. <a href="../element/badge.html" tppabs="http://www.layui.com/doc/element/badge.html">
  230. <span>徽章 </span>
  231. <span class="layui-font-12 layui-font-gray">小圆点 小边框</span>
  232. </a>
  233. </div>
  234. </li>
  235. <li class="">
  236. <div class="layui-menu-body-title">
  237. <a href="../element/timeline.html" tppabs="http://www.layui.com/doc/element/timeline.html">
  238. <span>时间线 </span>
  239. <span class="layui-font-12 layui-font-gray">timeline</span>
  240. </a>
  241. </div>
  242. </li>
  243. <li class="">
  244. <div class="layui-menu-body-title">
  245. <a href="../element/auxiliar.html" tppabs="http://www.layui.com/doc/element/auxiliar.html">
  246. <span>辅助 </span>
  247. <span class="layui-font-12 layui-font-gray">引用 字段集 横线等</span>
  248. </a>
  249. </div>
  250. </li>
  251. </ul>
  252. </li>
  253. <li class="layui-menu-item-group" lay-options="{type: 'group', isAllowSpread: true}">
  254. <div class="layui-menu-body-title">
  255. 内置模块
  256. </div>
  257. <hr>
  258. <ul>
  259. <li class="">
  260. <div class="layui-menu-body-title">
  261. <a href="layer.html" tppabs="http://www.layui.com/doc/modules/layer.html">
  262. <span>弹出层 </span>
  263. <span class="layui-font-12 layui-font-gray">layer</span>
  264. </a>
  265. </div>
  266. </li>
  267. <li class="">
  268. <div class="layui-menu-body-title">
  269. <a href="laydate.html" tppabs="http://www.layui.com/doc/modules/laydate.html">
  270. <span>日期与时间选择 </span>
  271. <span class="layui-font-12 layui-font-gray">laydate</span>
  272. </a>
  273. </div>
  274. </li>
  275. <li class="">
  276. <div class="layui-menu-body-title">
  277. <a href="laypage.html" tppabs="http://www.layui.com/doc/modules/laypage.html">
  278. <span>分页 </span>
  279. <span class="layui-font-12 layui-font-gray">laypage</span>
  280. </a>
  281. </div>
  282. </li>
  283. <li class="">
  284. <div class="layui-menu-body-title">
  285. <a href="laytpl.html" tppabs="http://www.layui.com/doc/modules/laytpl.html">
  286. <span>模板引擎 </span>
  287. <span class="layui-font-12 layui-font-gray">laytpl</span>
  288. </a>
  289. </div>
  290. </li>
  291. <li class="">
  292. <div class="layui-menu-body-title">
  293. <a href="table.html" tppabs="http://www.layui.com/doc/modules/table.html">
  294. <span>数据表格 </span>
  295. <span class="layui-font-12 layui-font-gray">table</span>
  296. </a>
  297. </div>
  298. </li>
  299. <li class="">
  300. <div class="layui-menu-body-title">
  301. <a href="form.html" tppabs="http://www.layui.com/doc/modules/form.html">
  302. <span>表单 </span>
  303. <span class="layui-font-12 layui-font-gray">form</span>
  304. </a>
  305. </div>
  306. </li>
  307. <li class="">
  308. <div class="layui-menu-body-title">
  309. <a href="upload.html" tppabs="http://www.layui.com/doc/modules/upload.html">
  310. <span>文件上传 </span>
  311. <span class="layui-font-12 layui-font-gray">upload</span>
  312. </a>
  313. </div>
  314. </li>
  315. <li class="">
  316. <div class="layui-menu-body-title">
  317. <a href="dropdown.html" tppabs="http://www.layui.com/doc/modules/dropdown.html">
  318. <span>下拉菜单 </span>
  319. <span class="layui-font-12 layui-font-gray">dropdown</span>
  320. <span class="layui-badge-dot"></span>
  321. </a>
  322. </div>
  323. </li>
  324. <li class="">
  325. <div class="layui-menu-body-title">
  326. <a href="transfer.html" tppabs="http://www.layui.com/doc/modules/transfer.html">
  327. <span>穿梭框 </span>
  328. <span class="layui-font-12 layui-font-gray">transfer</span>
  329. </a>
  330. </div>
  331. </li>
  332. <li class="">
  333. <div class="layui-menu-body-title">
  334. <a href="tree.html" tppabs="http://www.layui.com/doc/modules/tree.html">
  335. <span>树形组件 </span>
  336. <span class="layui-font-12 layui-font-gray">tree</span>
  337. </a>
  338. </div>
  339. </li>
  340. <li class="">
  341. <div class="layui-menu-body-title">
  342. <a href="colorpicker.html" tppabs="http://www.layui.com/doc/modules/colorpicker.html">
  343. <span>颜色选择器 </span>
  344. <span class="layui-font-12 layui-font-gray">colorpicker</span>
  345. </a>
  346. </div>
  347. </li>
  348. <li class="">
  349. <div class="layui-menu-body-title">
  350. <a href="element.html" tppabs="http://www.layui.com/doc/modules/element.html">
  351. <span>常用元素操作 </span>
  352. <span class="layui-font-12 layui-font-gray">element</span>
  353. </a>
  354. </div>
  355. </li>
  356. <li class="">
  357. <div class="layui-menu-body-title">
  358. <a href="slider.html" tppabs="http://www.layui.com/doc/modules/slider.html">
  359. <span>滑块 </span>
  360. <span class="layui-font-12 layui-font-gray">slider</span>
  361. </a>
  362. </div>
  363. </li>
  364. <li class="">
  365. <div class="layui-menu-body-title">
  366. <a href="rate.html" tppabs="http://www.layui.com/doc/modules/rate.html">
  367. <span>评分 </span>
  368. <span class="layui-font-12 layui-font-gray">rate</span>
  369. </a>
  370. </div>
  371. </li>
  372. <li class="">
  373. <div class="layui-menu-body-title">
  374. <a href="carousel.html" tppabs="http://www.layui.com/doc/modules/carousel.html">
  375. <span>轮播 </span>
  376. <span class="layui-font-12 layui-font-gray">carousel</span>
  377. </a>
  378. </div>
  379. </li>
  380. <li class="">
  381. <div class="layui-menu-body-title">
  382. <a href="layedit.html" tppabs="http://www.layui.com/doc/modules/layedit.html">
  383. <span>富文本编辑器 </span>
  384. <span class="layui-font-12 layui-font-gray">layedit</span>
  385. </a>
  386. </div>
  387. </li>
  388. <li class="layui-menu-item-checked2">
  389. <div class="layui-menu-body-title">
  390. <a href="flow.html" tppabs="http://www.layui.com/doc/modules/flow.html">
  391. <span>流加载 </span>
  392. <span class="layui-font-12 layui-font-gray">flow</span>
  393. </a>
  394. </div>
  395. </li>
  396. <li class="">
  397. <div class="layui-menu-body-title">
  398. <a href="util.html" tppabs="http://www.layui.com/doc/modules/util.html">
  399. <span>工具组件 </span>
  400. <span class="layui-font-12 layui-font-gray">util</span>
  401. </a>
  402. </div>
  403. </li>
  404. <li class="">
  405. <div class="layui-menu-body-title">
  406. <a href="code.html" tppabs="http://www.layui.com/doc/modules/code.html">
  407. <span>代码高亮显示 </span>
  408. <span class="layui-font-12 layui-font-gray">code</span>
  409. </a>
  410. </div>
  411. </li>
  412. </ul>
  413. </li>
  414. </ul>
  415. </div>
  416. <div class="layui-hide-v"> - </div>
  417. </div>
  418. <div class="layui-col-md9 site-content">
  419. <h1 class="site-h1"><i class="layui-icon">&#xe636;</i> 流加载文档 - layui.flow</h1>
  420. <blockquote class="site-text layui-elem-quote">
  421. 该模块包含<em>信息流加载</em>和<em>图片懒加载</em>两大核心支持,无论是对服务端、还是前端体验,都有非常大的性能帮助。你可能已经在太多的地方看到她们的身影了,但不妨现在开始,体验一下Layui更为简单和高效的Flow吧。
  422. </blockquote>
  423. <blockquote class="site-text layui-elem-quote">
  424. <p>模块加载名称:<em>flow</em></p>
  425. </blockquote>
  426. <div class="site-title">
  427. <a name="use"></a>
  428. <fieldset><legend>使用</legend></fieldset>
  429. </div>
  430. <div class="site-text">
  431. <p>flow模块包含两个核心方法,如下所示:</p>
  432. <pre class="layui-code">
  433. layui.use('flow', function(){
  434. var flow = layui.flow;
  435. //信息流
  436. flow.load(options);
  437. //图片懒加载
  438. flow.lazyimg(options);
  439. });
  440. </pre>
  441. <p>下面将对她们进行详细介绍。</p>
  442. </div>
  443. <div class="site-title">
  444. <a name="load"></a>
  445. <fieldset><legend>信息流</legend></fieldset>
  446. </div>
  447. <div class="site-text">
  448. <p>信息流即异步逐页渲染列表元素,这是你页面已经存在的一段列表,你页面初始时只显示了6个</p>
  449. <pre class="layui-code" lay-title="HTML" lay-encode="true">
  450. <ul id="demo">
  451. &lt;li>1&lt;/li>
  452. &lt;li>2&lt;/li>
  453. ……
  454. &lt;li>6&lt;/li>
  455. </ul>
  456. </pre>
  457. <p>你想通过加载更多来显示余下列表,那么你只需要执行方法:<a>flow.load(options)</a> 即可</p>
  458. <pre class="layui-code" lay-title="JavaScript" lay-encode="true">
  459. layui.use('flow', function(){
  460. 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。
  461. var flow = layui.flow;
  462. flow.load({
  463. elem: '#demo' //指定列表容器
  464. ,done: function(page, next){ //到达临界点(默认滚动触发),触发下一页
  465. var lis = [];
  466. //以jQuery的Ajax请求为例,请求下一页数据(注意:page是从2开始返回)
  467. $.get('/api/list?page='+page, function(res){
  468. //假设你的列表返回在data集合中
  469. layui.each(res.data, function(index, item){
  470. lis.push('<li>'+ item.title +'</li>');
  471. });
  472. //执行下一页渲染,第二参数为:满足“加载更多”的条件,即后面仍有分页
  473. //pages为Ajax返回的总页数,只有当前页小于总页数的情况下,才会继续出现加载更多
  474. next(lis.join(''), page < res.pages);
  475. });
  476. }
  477. });
  478. });
  479. </pre>
  480. <p>上述是一个比较简单的例子,以下是信息流完整的参数支撑(即options对象),它们将有助于你更灵活地应对各种场景</p>
  481. <table class="layui-table">
  482. <thead>
  483. <tr>
  484. <th>参数</th>
  485. <th>类型</th>
  486. <th>描述</th>
  487. </tr>
  488. </thead>
  489. <tbody>
  490. <tr>
  491. <td>elem</td>
  492. <td>string</td>
  493. <td>指定列表容器的选择器</td>
  494. </tr>
  495. <tr>
  496. <td>scrollElem</td>
  497. <td>string</td>
  498. <td>滚动条所在元素选择器,默认document。如果你不是通过窗口滚动来触发流加载,而是页面中的某一个容器的滚动条,那么通过该参数指定即可。</td>
  499. </tr>
  500. <tr>
  501. <td>isAuto</td>
  502. <td>boolean</td>
  503. <td>是否自动加载。默认true。如果设为false,点会在列表底部生成一个“加载更多”的button,则只能点击它才会加载下一页数据。</td>
  504. </tr>
  505. <tr>
  506. <td>end</td>
  507. <td>string</td>
  508. <td>用于显示末页内容,可传入任意HTML字符。默认为:没有更多了</td>
  509. </tr>
  510. <tr>
  511. <td>isLazyimg</td>
  512. <td>boolean</td>
  513. <td>是否开启图片懒加载。默认false。如果设为true,则只会对在可视区域的图片进行按需加载。但与此同时,在拼接列表字符的时候,你不能给列表中的img元素赋值src,必须要用lay-src取代,如:
  514. <pre class="layui-code" lay-title="JavaScript片段">
  515. layui.each(res.data, function(index, item){
  516. lis.push('&lt;li>&lt;img lay-src="'+ item.src +'">&lt;/li>');
  517. });
  518. </pre>
  519. </td>
  520. </tr>
  521. <tr>
  522. <td>mb</td>
  523. <td>number</td>
  524. <td>与底部的临界距离,默认50。即当滚动条与底部产生该距离时,触发加载。注意:只有在isAuto为true时有效。<br>额,等等。。mb=margin-bottom,可不是骂人的呀。</td>
  525. </tr>
  526. <tr>
  527. <td>done</td>
  528. <td>function</td>
  529. <td>到达临界点触发加载的回调。信息流最重要的一个存在。携带两个参数:
  530. <pre class="layui-code" lay-title="JavaScript片段">
  531. done: function(page, next){
  532. //请注意:layui 1.0.5 之前的版本是从第2页开始返回,也就是说你的第一页数据并非done来触发加载
  533. (为之前这个愚蠢的设计表示抱歉)
  534. //从 layui 1.0.5 的版本开始,page是从1开始返回,初始时即会执行一次done回调。
  535. //console.log(page) //获得当前页
  536. //执行下一页渲染,第二参数为:满足“加载更多”的条件,即后面仍有分页
  537. //只有当前页小于总页数的情况下,才会继续出现加载更多
  538. next('列表HTML片段', page < res.pages);
  539. }
  540. </pre>
  541. </td>
  542. </tr>
  543. </tbody>
  544. </table>
  545. </div>
  546. <div class="site-title">
  547. <a name="lazyimg"></a>
  548. <fieldset><legend>图片懒加载</legend></fieldset>
  549. </div>
  550. <div class="site-text">
  551. <p>应该说比当前市面上任何一个懒加载的实现都更为强劲和轻量,她用不足80行代码巧妙地提供了一个始终加载当前屏图片的高性能方案(无论上滑还是下滑)。对你的网站因为图片可能带来的压力,可做出很好的应对。</p>
  552. <p>语法:<em>flow.lazyimg(options)</em></p>
  553. <pre class="layui-code">
  554. layui.use('flow', function(){
  555. var flow = layui.flow;
  556. //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(当然你也可以指定相关 img)
  557. flow.lazyimg();
  558. });
  559. </pre>
  560. <p>如上所述,它只会针对以下 img 元素有效:</p>
  561. <pre class="layui-code" lay-title="HTML">
  562. &lt;img src="占位图地址" lay-src="预加载图地址">
  563. &lt;img src="" src="bbb.jpg">
  564. &lt;img src="" lay-src="ccc.jpg">
  565. </pre>
  566. <blockquote class="layui-elem-quote layui-text">
  567. <span class=" layui-font-red">占位图功能为 layui 2.6.6 开始新增。</span>
  568. 这本应在 1.0 就该支持,但由于重心在其他组件,导致姗姗来迟。
  569. </blockquote>
  570. <p>如你所见,图片懒加载的使用极其简单,其参数(options 对象)可支持的 key 如下表所示:</p>
  571. <table class="layui-table">
  572. <thead>
  573. <tr>
  574. <th>参数</th>
  575. <th>类型</th>
  576. <th>描述</th>
  577. </tr>
  578. </thead>
  579. <tbody>
  580. <tr>
  581. <td>elem</td>
  582. <td>string</td>
  583. <td>指定开启懒加载的img元素选择器,如 elem: '.demo img' 或 elem: 'img.load'</td>
  584. </tr>
  585. <tr>
  586. <td>scrollElem</td>
  587. <td>string</td>
  588. <td>滚动条所在元素选择器,默认document。如果你不是通过窗口滚动来触发流加载,而是页面中的某一个容器的滚动条,那么通过该参数指定即可。</td>
  589. </tr>
  590. <tr>
  591. </tbody>
  592. </table>
  593. </div>
  594. <div class="site-title">
  595. <a name="other"></a>
  596. <fieldset><legend>结语</legend></fieldset>
  597. </div>
  598. <div class="site-text">
  599. <p>如果还有各种流行的流加载,你可以给我们提供建议,我们会在layui后续版本中选择性加入。</p>
  600. </div>
  601. <div class="layui-elem-quote">
  602. <p>layui - 在每一个细节中,用心与你沟通</p>
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