title: How to use Hyphen(-) between two strings in angular 9 ngIf condition
body: <p>I have an If condition in html to check permission to access a particular page :</p>
  <pre><code>    *ngIf=&quot;permission?.product-report?.list_product_report&quot;
  </code></pre>
  <p>product-report is a static name which gives directly to the condition</p>
  <p>When I execute it, got an error as below:</p>
  <pre><code>    Property 'report' does not exist on type 'ProductComponent'.
  </code></pre>
  <p>Why this error occurs ? Someone please help me..</p>