23 lines
641 B
Markdown
23 lines
641 B
Markdown
---
|
|
title: findClosestMatchingNode
|
|
tags: browser,intermediate
|
|
---
|
|
|
|
Finds the closest matching node starting at the given `node`.
|
|
|
|
- Use a `for` loop and `Node.parentNode` to traverse the node tree upwards from the given `node`.
|
|
- Use `Element.matches()` to check if any given element node matches the provided `selector`.
|
|
- If no matching node is found, return `null`.
|
|
|
|
```js
|
|
const findClosestMatchingNode = (node, selector) => {
|
|
for (let n = node; n.parentNode; n = n.parentNode)
|
|
if (n.matches && n.matches(selector)) return n;
|
|
return null;
|
|
};
|
|
```
|
|
|
|
```js
|
|
findClosestMatchingNode(document.querySelector('span'), 'body'); // body
|
|
```
|