Bug 1767561 Comment 7 Edit History

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Original comment by
on 
```
<div id="d1" style="visibility: visible;">d1
  <div id="d2" style="visibility: visible;">d2
    <div style="visibility: visible;">d3</div>
  </div>
</div>
```

If we do:
`d1.style.visibility = "hidden";`

Strictly speaking, only d1's style has changed. However, we must traverse d2 (even though it's style hasn't changed) because otherwise, we wouldn't add it back into the a11y tree. But do we traverse d3? (I realise we don't send a notification for it because of the skip flag, but I'm curious as to whether the function gets a chance to look at it at all.)
Revision 1 by
on 
```
<div id="d1" style="visibility: visible;">d1
  <div id="d2" style="visibility: visible;">d2
    <div style="visibility: visible;">d3</div>
  </div>
</div>
```

If we do:
`d1.style.visibility = "hidden";`

Strictly speaking, only d1's style has changed. However, we must traverse d2 (even though its style hasn't changed) because otherwise, we wouldn't add it back into the a11y tree. But do we traverse d3? (I realise we don't send a notification for it because of the skip flag, but I'm curious as to whether the function gets a chance to look at it at all.)

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