# Alpine.js Documentation - Directives
Alpine directives are attributes that you can add to HTML elements to give them special behavior.
## [x-ref](/directives/ref)
`x-ref` in combination with `$refs` is a useful utility for easily accessing DOM elements directly. It's most useful as a replacement for APIs like `getElementById` and `querySelector`.
```
Hello 👋
```
Hello 👋
> Despite not being included in the above snippet, `x-ref` cannot be used if no parent element has `x-data` defined. [→ Read more about `x-data`](/directives/data)
[← x-ignore](/directives/ignore)
[x-cloak →](/directives/cloak)
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