# Custom data attribute

An attribute beginning with data- that stores page-specific data on an element.

## What is a **Custom data attribute**?

An attribute beginning with data- that stores page-specific data on an element.

```html
<button data-order-id="A1042">View order</button>
```

Level: Journeyman · [More HTML terms at this level](https://www.ask-codey.com/glossary/subjects/html/journeyman)

Updated: October 16, 2026

Source: https://www.ask-codey.com/glossary/custom-data-attribute