前后端分离的网站模板，如果不用任何渲染引擎，能否封装公共的header和footer（或其它html公共代码呢）？
答案是肯定的，因为jQuery有一个函数叫 load ，可以在浏览器绘制页面之前加载完整的 html 页面。所以，当前页面必须要先加载jQuery框架，即你的script标签加载顺序需要注意。
示例代码如下：
index.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>Bootstrap 101 Template</title>
<!-- Bootstrap -->
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<link href="style/cms-PC.css" rel="stylesheet">
<!-- HTML5 shim 和 Respond.js 是为了让 IE8 支持 HTML5 元素和媒体查询（media queries）功能 -->
<!-- 警告：通过 file:// 协议（就是直接将 html 页面拖拽到浏览器中）访问页面时 Respond.js 不起作用 -->
<!--[if lt IE 9]>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/html5shiv.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dest/respond.min.js"></script>
<![endif]-->
</head>
<body>
<!-- header -->
<div class="headerpage"></div>
<div class="main container">
<!-- 首页其它渲染 -->
</div>
<!--footer-->
<div class="footerpage"></div>
<!-- fixed QQ 返回顶部 -->
<div class="fixedQQpage"></div>
<!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
<!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="js/utils/common.js"></script>
<script src="js/utils/request.js"></script>
<script src="js/index.js"></script>
</body>
</html>
header.html
<nav class="navbar navbar-default navbar-fixed-top" id="nav">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Project name</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">Nav header</li>
<li><a href="#">Separated link</a></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="../navbar/">Default</a></li>
<li><a href="../navbar-static-top/">Static top</a></li>
<li class="active"><a href="./">Fixed top <span class="sr-only">(current)</span></a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
footer.html
<footer>
<div class="container container-top">
<div class="row">
<div class="col-sm-3 creator">
<div class="creator-title">Created by</div>
<a href="https://notainc.com" target="_blank"><img class="creator-logo" src="images/test-2.jpg"></a>
</div>
<div class="col-sm-9">
<ul class="menu">
<li><a href="/product">Home</a></li>
<li><a href="/pricing">Pricing</a></li>
<li><a href="/contact">Contact</a></li>
<li><a href="http://www.notainc.com" target="_blank" rel="noopener">About us</a></li>
<li><a href="/privacy">Privacy</a></li>
</ul>
</div>
</div>
</div>
<div class="container container-bottom">
<div class="row">
<div class="col-xs-6 container-bottom-col">© 2019 Nota Inc.</div>
<div class="col-xs-6 container-bottom-col">
© 2019 Nota Inc.
</div>
</div>
</div>
</footer>