Go to the GOV.UK Prototype Kit site to download the latest version and read the documentation.
Example code for prototype testing.
Basic application journey using error messages, input fields, radio buttons, select boxes, check boxes, check answers page and summary screen.
Simple example of routing based on user input.
Example of routing users based on age. The demo shows a different page to users under the age of 16.
Example of one page with both required and non required text fields, with error messages.
Example of calculating and displaying start date and expiry dates for permits or licences.