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Traversing the DOM

Element.firstElementChild & Element.lastElementChild

Get the first and last child element of a parent element.

<ul>
	<!-- The gray wizard -->
	<li>Gandalf</li>
	<li>Radagast</li>
	<li>Hermione</li>
	<!-- The surprise hero -->
	<li>Neville</li>
</ul>
let wizards = document.querySelector('ul');

// returns <li>Gandalf</li>
let firstDescendant = wizards.firstElementChild;

// returns <li>Neville</li>
let lastDescendant = wizards.lastElementChild;

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