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30-seconds-of-code/snippets/elementContains.md
Angelos Chalaris 1c8e535a41 Add 4 new browser snippets
triggerEvent - trigger an event on an element, insertAfter & insertBefore - parse and insert HTML after or before an element respectively, elementContains - checks if an element contains another element
2018-06-19 20:57:58 +03:00

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### elementContains
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.
```js
const elementContains = (parent, child) => parent !== child && parent.contains(child);
```
```js
elementContains(document.querySelector('head'), document.querySelector('title')); // true
elementContains(document.querySelector('body'), document.querySelector('body')); // false
```