Opening Chrome dev tools
We are using Chrome dev tools for all the below five items, which can be found using the following shortcuts.
Cmd + Shift + C or Windows:
Ctrl + Shift + C.
The first and perhaps most obvious one is the accessibility inspector.
This will show us mainly the ARIA properties of certain DOM elements.
To access this menu, we need to open Chrome dev tools and right-click an element. It’s under the inspect tab but can be hidden under the extra options.
If you want to learn more about creating good aria labels, look at this article on ARIA.
Did you know we can emulate vision deficiencies?
You want to use this function to make sure people with vision deficiencies correctly see your website.
It might be that people with a certain vision disability.
Open up the Chrome dev tools.
Then we click more tools and choose, Rendering.
Scroll down to the bottom on the rendering tab and find “Emulate vision deficiencies”.
We can filter on the following:
- Blurred vision (People who can’t see sharp)
- Protanopia (Color-blind, shades of red/greens)
- Deuteranopia (Color-blind, green blind)
- Tritanopia (Color-blind, blue, yellow shades)
- Achromatopsia (Total color blind)
This will look as follows:
Note the image below shows a blurred vision image!
Obviously, we have Lighthouse, which nowadays has a whole accessibility tab build in.
Open Chrome dev tools and click on the Lighthouse tab.
We can then check the accessibility checkbox.
We then get a report like this.
It checks on things such as:
- Aria definitions
- Role attributes
- Contrast ratios
- Lang attribute on HTML
- Tabindex on forms
- Alt elements
- And many more!
A big thing when it comes to accessibility is contrast. We also saw this in our vision deficiency item.
Chrome has a quick way to show contrast in a certain element.
To open the Contrast ratio, we need to open Chrome dev tools.
Then inspect a text element and find a color box.
Click the little color box and choose the pointer element.
You might think ok, but what does this mean?
- The first value is your current contrast ratio
- The second value is the minimum contrast ratio (AA)
- The last one is the enhanced contrast ratio (AAA)
You can change the colour and see if you can enhance your contrasts.
Another great tooltip which combines many of the above is actually the inspector tooltip.
We can use the inspector tooltip by opening Dev tools and selecting the pointer icon.
Then we can hover an element and see with one quick glimpse what the contrast is the role, and if it’s focusable by the keyboard.