Number field accessibility

Keyboard interaction

Key	Action
`Up and down arrows`	Steps the value up or down.
`Page Up and Page Down`	Steps ten times.
`Home and End`	Goes to the minimum or maximum.
`Enter`	Commits what was typed.

The input is a spinbutton with aria-valuenow, aria-valuemin, aria-valuemax, and the formatted value as aria-valuetext.
The step buttons stay out of the tab order, since the keys do the same job, but they are named and linked to the input with aria-controls.
Label the input with aria-label or a <label>.