data-
Custom data attributes are intended to store custom data private to the page or application, for which there are no more appropriate attributes or elements. 3.2.5.7. Embedding custom non-visible data with the data-* attributes
Links about data-
A Complete Guide to Data Attributes | CSS-Tricks
Everything you ever wanted to know about data attributes in HTML, CSS, and JavaScript.
Code sample
<h3 data-author-id="bob">
Bob
</h3>Explore other pages
- grid-template-rows
Specifies named grid areas.
- type="date"
A control for setting the element’s value to a specific date
- type="search"
A text field designed for the user to enter search queries into.
- tabindex
Sets tab order and defines whether an element can be focused or not."