title: How to change router by typescript in angular2?
body: <p>For example, I use router-link like this:</p>
  
  <pre><code>&lt;li&gt;&lt;a [router-link]="['/start']"&gt;Start&lt;/a&gt;&lt;/li&gt;
  </code></pre>
  
  <p>But  how can I change the router to /start by typescript?</p>