title: Property 'checked' does not exist on type 'EventTarget'.ts(2339) Angular
body: <p>Question is same as this:</p>
  <p><a href="https://stackoverflow.com/questions/57030813/typescript-property-checked-does-not-exist-on-type-eventtarget-element-w">TypeScript: Property &#39;checked&#39; does not exist on type &#39;EventTarget &amp; Element&#39;. Why it doesn&#39;t exist?</a></p>
  <p>But only for different framework.</p>
  <p>I need this answear for ANGULAR 2+ . Currently i am using angular 9</p>
  <pre><code>public CheckBoxChange(event: Event) { 
      this.service.change(this.d!.id.toString(), event.target.checked).subscribe(res =&gt; {
          console.log(res
      }, err =&gt; {
          console.log(err)
      })
  }
  </code></pre>
  <p>Problem is here <strong>event.target.checked</strong></p>
  <p>Error message:</p>
  <blockquote>
  <p>Property 'checked' does not exist on type 'EventTarget'.ts(2339)</p>
  </blockquote>
  <p>How to fix this ? Ok i can set type: any but this is not solution.</p>