# insertBefore

Canonical: https://www.wiki.jodisand.me/snippets/javascript/insertbefore/


Inserts an HTML string before the start of the specified element.

- Use `Element.insertAdjacentHTML()` with a position of `'beforebegin'` to parse `htmlString` and insert it before the start of `el`.

```js
const insertBefore = (el, htmlString) =>
  el.insertAdjacentHTML('beforebegin', htmlString);
```

```js
insertBefore(document.getElementById('myId'), '<p>before</p>');
// <p>before</p> <div id="myId">...</div>
```