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