title: include jQuery to html
body: <p>I was working with jQuery on <a href="https://codepen.io/" rel="nofollow noreferrer">https://codepen.io/</a> and to include jQuery is very easy. So i decided to work on files on my computer, i tried to include it using the file and it didn't work. also i tried to include from CDN but still doesn't work.</p>
  
  <pre><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script src="js/Web.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>and in the Web.js i put this code:</p>
  
  <pre><code>&lt;button id="btn"&gt;Hide&lt;/button&gt;
  &lt;p id="para"&gt;A dpara.&lt;/p&gt;
  </code></pre>