Testing Browser testing
Design system components and patterns must work on every browser and device that users access our services on.
Services do not have to look perfect in every browser, but users must be able to access and use all the information and features they need.
Browsers to test in
However, if your service’s analytics data shows at least 2% of your users are using a different browser or version, then you will need to test against that as well.
You must also make sure your service works with assistive technologies
Microsoft Internet Explorer
To help any remaining users upgrade their browser from IE 11, a banner which will display only in Internet Explorer is included in the base page template.
Understanding your users
When building your service, you should analyse its users’:
- operating systems
- browser versions
If evidence shows that your users have specific needs or extra support requirements, you can use this to make a case for not meeting these browser requirements.
For example, internal services used exclusively by ONS staff may not need to work on all supported browsers if there is evidence users can only use the service on an operating system and network restricted to certain browsers.