title: Do I need to delete an object in javascript if I declared it with let?
body: <p>In javascript if I declare an object with let, do I need to explicitly delete it?</p>
  
  <p>Example:</p>
  
  <pre><code>downloadHelper(url) {
      let pom = document.createElement('a');
      pom.setAttribute('href', url);
      pom.setAttribute('download', '');
      pom.style.display = 'none';
      document.body.appendChild(pom);
      pom.click();
      document.body.removeChild(pom);
      delete pom;
  },
  </code></pre>