JavaScript closest

JavaScript closest
JavaScript closest
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Relating to discovering relationships between parts, we historically recall to mind a top-down way. We will be able to thank CSS and querySelector/querySelectorAll for that courting in selectors. What if we need to to find a component’s father or mother in line with selector?

To appear up the part tree and discover a father or mother by means of selector, you’ll be able to use HTMLElement‘s closest manner:

// Our pattern part is an "a" tag that fits ul > li > a
const hyperlink = record.querySelector('li a');
const checklist = a.closest('ul');

closest appears to be like up the ancestor chain to discover a matching father or mother part — the other of conventional CSS selectors. You’ll be able to supply closest a easy or advanced selector to seem upward for!

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