30-seconds-of-code/snippets/elementContains.md

title, tags

title	tags
elementContains	browser,intermediate

Returns true if the parent element contains the child element, false otherwise.

• Check that parent is not the same element as child, use parent.contains(child) to check if the parent element contains the child element.

const elementContains = (parent, child) => parent !== child && parent.contains(child);

elementContains(document.querySelector('head'), document.querySelector('title')); // true
elementContains(document.querySelector('body'), document.querySelector('body')); // false