title: Js Chrome dev tools prints Array with length but no children
body: <p>You can see in the screenshot that all three Arrays has lengths, but no children. Why that happens? Is it because Garbage collection hasn't collected and space for items is still reserved? </p>
  
  <p><a href="https://i.stack.imgur.com/9y766.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9y766.png" alt="enter image description here"></a></p>