I am doing all what in the docs is described, but the validator is not working. Any idea why?
For more of the implementation and steps check:
Hi, the link to magento stack exchange doesn't seem to be working, do you have an alternative?
The docs page is a good one to be following. Have you double checked you've followed the instructions? Is there any change in behaviour so far or any errors in the browser console to show what problem is happening?
The layout declaration is particularly awful to write and one character wrong can mean it won't work.