form.FormController.$error

Is an object hash, containing references to controls or forms with failing validators, where:

• keys are validation tokens (error names),

• values are arrays of controls or forms that have a failing validator for given error name.

  Built-in validation tokens:

• email

• max
• maxlength
• min
• minlength
• number
• pattern
• required
• url
• date
• datetimelocal
• time
• week
• month