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