html introduces jQuery and bootstrap

The following is the introduction of jQuery and bootstrap for the network

<link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css"><!--引入bootstrap的css样式库-->
<script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script><!--引入jQuery-->
<!--bootstrap是基于jQuery库的，所以应该先导入jQuery-->
<script src="http://cdn.bootcss.com/bootstrap/3.3.0/js/bootstrap.min.js"></script><!--引入bootstrap-->

Local introduction can download jQuery and bootstrap

jQuery download

bootstrap download

Relative path introduced after the download link to download the code into the file of
the test method

<input type="button" value="bootstrap样式" class="btn"/>
<input type="button" value="普通样式" />

If the two button styles are not the same, it proves that they have been imported