Naturligt lys fra oven | Inspiration til design | VELUX

Kundeservice | Hjælp og rådgivning om produkter | VELUX

For arkitekter | Værktøjer og inspiration til design med dagslys | VELUX

Husbyggere | Få hjælp til at vækste din virksomhed | VELUX

Forhandlere | Information til fagfolk | VELUX

Opgrader dine ovenlysvinduer | VELUX

Design- og beregningsværktøjer | Prøv dem nu | VELUX

Alle rum | Hvilket rum vil du forvandle med ovenlys? | VELUX

Renovering af loftrum | Alt du behøver at vide | VELUX

Tilbygning | Få mere plads uden at flytte | VELUX

All controls on the page - including links, buttons, and fields - should show when 
they have been selected by the keyboard.

You can confirm this yourself by loading a webpage and using the Tab key to navigate 
through it. Anything you can select should alter its appearance when selected. 
For example, a text field might change color, or have a distinctive border applied. 

This is default behavior for all standard web controls, and so if this issue is appearing
it is because this default behavior has been disabled. Or alternatively, if you have written
your own custom controls, these will need styling to support focus states.

## How to fix

Links and form controls typically define an `outline` CSS style, which ensures
they are highlighted automatically, for example:

```css
input:focus (outline: 2px solid red);
``` 

If you choose to override or disable the default `outline`, you should specify an accessible 
alternative, such as a border or background color.

### Elements appear to change in the browser

Focus states should be defined in CSS alone, and not require JavaScript to work.

Try disabling JavaScript on the page, and see if focus is still visible. If it not,
then the focus state won't work with assistive technologies that don't have a physical
keyboard, e.g. mobile phones.

Some more unusual means of implementing a focus state cannot be detected or measured
automatically. These include:

* Focus implemented via pseudo-elements - such as `::after` or `::before`.
* Focus using `:focus-within` (JavaScript current provides no way to access these).
* Focus cascaded to child elements, e.g. a `<span>` inside an `<a>` tag. We detect
  some of these cases, but there are variations that we cannot detect.

Currently, there is no practical way to assess these focus states automatically.

### Unexpected elements are focusable

You may be surprised to see tags like `<div>` or `<span>` being shown as focusable.
If an element has a `tabindex` of 0 or higher, it becomes focusable. Any HTML tag can be made 
focusable in this way, this is so that custom controls (e.g. your own drop-down menus, or 
sliders) can support keyboard navigation. [Learn more about tabindex on MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/tabindex).

## Further reading

* [WCAG 2.4.7](https://www.w3.org/WAI/WCAG22/Understanding/focus-visible.html)

ensure-focus-is-visible

September 2025

August 2025

VKR (Velux)

	Title / URL	Issues
	Naturligt lys fra oven \| Inspiration til design \| VELUXwww.velux.dk/artikler	70
	Kundeservice \| Hjælp og rådgivning om produkter \| VELUXwww.velux.dk/kundeservice	20
	For arkitekter \| Værktøjer og inspiration til design med dagslys \| VELUXwww.velux.dk/ressourcer/arkitekter	19
	Husbyggere \| Få hjælp til at vækste din virksomhed \| VELUXwww.velux.dk/ressourcer/husbyggere	19
	Forhandlere \| Information til fagfolk \| VELUXwww.velux.dk/ressourcer/forhandlere	18
	Opgrader dine ovenlysvinduer \| VELUXwww.velux.dk/projekter/opgradering	17
	Design- og beregningsværktøjer \| Prøv dem nu \| VELUXwww.velux.dk/ressourcer/vaerktoejer	15
	Alle rum \| Hvilket rum vil du forvandle med ovenlys? \| VELUXwww.velux.dk/rum	14
	Renovering af loftrum \| Alt du behøver at vide \| VELUXwww.velux.dk/projekter/ombygning	13
	Tilbygning \| Få mere plads uden at flytte \| VELUXwww.velux.dk/projekter/tilbygning	12

Ensure controls change appearance when they are selected

VKR (Velux)

Where this issue has occurred