The input element with a type attribute whose value is "datetime" represents a control for setting the element’s value to a string representing a global date and time (with timezone information).
Identifies the type of input control to display. Acceptable values are hidden, text, tel, url, email, password, date, time, number, range, color, checkbox, radio, file, submit, image, reset, and button. Defaults to text if not specified, if the value is invalid, or if the browser does not support the type specified.
name
Indicates the name of the input
disabled
Boolean value that indicates the input should be disabled. Disabled controls cannot be edited, are not sent on form submission, and cannot receive focus.
checked
When the value of the type attribute is radio or checkbox, the presence of this Boolean attribute indicates that the control is selected by default; otherwise it is ignored.
multiple
HTML5 Indicates multiple files or values can be passed (Applies only to file and email type inputs )
placeholder
HTML5 A hint to the user of what can be entered in the control . The placeholder text must not contain carriage returns or line-feeds
autocomplete
HTML5 Indicates whether the value of the control can be automatically completed by the browser.
readonly
Boolean value that indicates the input is not editable. Readonly controls are still sent on form submission, but will not receive focus. HTML5: This attribute is ignored when the value of type attribute is either set to hidden, range, color, checkbox, radio, file or button.
required
HTML5 Indicates a value must be present or the element must be checked in order for the form to be submitted
alt
An alternative text for images, in case they are not displayed.
autofocus
The <input> element should get the focus when page loads.
value
Specifies the value of <input> element.
step
The step attribute specifies the legal number intervals. It works with the following input types: number, range, date, datetime-local, month, time and week.
Remarks
As with other HTML5 void elements, <input> is self-closing and may be written <input />. HTML5 does not require this slash.
The following are newly introduced input types as a part of HTML 5 standard. Some of these types are not supported by all web browsers. In the case where a type is not supported, the input element will default to the text type.