In the case of discovering relationships between parts, we historically consider a top-down method. We will thank CSS and querySelector/querySelectorAll for that relationship in selectors. What if we need to discover a component’s guardian primarily based on selector?
To look up the factor tree and discover a guardian by selector, you should utilize HTMLElement‘s closest technique:
// Our pattern factor is an "a" tag that matches ul > li > a
const hyperlink = doc.querySelector('li a');
const checklist = a.closest('ul');
closest seems up the ancestor chain to discover a matching guardian factor — the alternative of conventional CSS selectors. You’ll be able to present closest a easy or complicated selector to look upward for!
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