autocapitalize [!] This is a nonstandard attribute used by iOS Safari Mobile which controls whether and how the text value should be automatically capitalized as it is entered/edited by the user. The non-deprecated values are available in iOS 5 and later. Possible values are: none: Completely disables automatic capitalization sentences: Automatically capitalize the first letter of sentences. words: Automatically capitalize the first letter of words. characters: Automatically capitalize all characters. on: Deprecated since iOS 5. off: Deprecated since iOS 5.