Run results for: parentNode vs firstChild vs nextSibling vs previousSibling (plus bonus: firstChild.nextSibling, querySelectorAll)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

HTML Preparation code:

<html>

<body>
    <div id='test'><div class='child'></div><div></div><div></div></div>
</body>

</html>

Script Preparation code:

var parent = document.getElementById('test');
var child1 = parent.children[0]
var child2 = parent.children[1]

Tests: