Find the next/prev matching sibling using vanilla JS

findNextPrev.js

const getPreviousMatch = (el, target) => {

	// Get the next matching element
	let match = el.previousElementSibling;

	// If there's no selector, return the first element
	if (!target) return match;

	// If the element matches our selector, use it
	// If not, jump to the next element and continue the loop
	while (match) {
		if (match.matches(target)) return match;
		match = match.previousElementSibling;
	}
};
const getNextMatch = (el, target) => {

	// Get the next matching element
	let match = el.nextElementSibling;

	// If there's no selector, return the first element
	if (!target) return match;

	// If the element matches our selector, use it
	// If not, jump to the next element and continue the loop
	while (match) {
		if (match.matches(target)) return match;
		match = match.nextElementSibling
	}
};