title: Angular4 default load boostrap library?
body: <p>I new a angular4 project and write the code in app.component.html</p>
  
  <pre><code>&lt;div class="container"&gt;
    &lt;div class="row"&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
      &lt;div class="col-md-1"&gt;.col-md-1&lt;/div&gt;
    &lt;/div&gt;    
  &lt;/div&gt;
  </code></pre>
  
  <p>But It no work</p>
  
  <p>I look the course seems like angular4 default loading bootstrap lib by <code>bootstrap: [AppComponent]</code> 
  in app.module.ts, but it didn't work for me, when I add </p>
  
  <pre><code>&lt;link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"&gt; 
  </code></pre>
  
  <p>in index.html, then it work, why?</p>