Modifying the server request The parameter containing the input value, sent to the server, will by default have the same name as the input.
You can however set your own parameter name by using the attribute By using the module sanitize you will be able to declare sanitation functions that will be triggered when inputs looses focus.
Read the setup guide if you want to know which configuration options that are available when setting up the validation.
The If wanting to use a custom method that handles the displaying/removing of error messages you should use the two methods described above.
The text will fade in when the input gets focus on and fade out when the input looses focus.
The container for the help text will have the class By default each input will become validated immediately when the input looses focus.
If you don't want this feature you can read the setup guide on how to disable it.
There are two ways you can give suggestions to the user while the user types.
error Message Key - Name of language property that is used in case the value of the input is invalid.