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