title: Add multiple values to disabled attribute in Angular
body: <p>I am trying to add values to a <strong>disabled</strong> directive. So if you look at the code below I am disabling a button if a value matches <code>System Admin</code>. I am now trying to add more values to this. So I want to add <code>System Admin</code> and <code>HR Manager</code> to this.</p>
  
  <pre><code>[disabled]="userRole === 'System Admin'"
  </code></pre>
  
  <p>I tried this but it does not seem to work</p>
  
  <pre><code>[disabled]="userRole === 'System Admin' || 'HR Manager'"
  </code></pre>