title: How to verify if my list with checkbox are all checked using Angular 5
body: <p>I created a list with one checkbox for each item, and I need to verify if all of them are ckecked. </p>
  
  <p>This is my HTML:</p>
  
  <pre><code>&lt;ul class="ingredient-list" &gt;
     &lt;li class="btn-list" *ngFor="let ingredient of recipe.ingredients"&gt;
          &lt;label class="checky round"&gt;
            &lt;input type="checkbox" checked&gt;
            &lt;span&gt;&lt;/span&gt;
            &lt;span&gt;{{ ingredient }}&lt;/span&gt;
          &lt;/label&gt;
     &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>