input type=file – file upload control

ⓘ input type=file – file upload control # T

The input element with a type attribute whose value is "file" represents a list of file items, each consisting of a file name, a file type, and a file body (the contents of the file).

Permitted contents #

empty (void element)

Permitted attributes #

global attributes & name & disabled & form & type★ & accept & autofocus & required & multiple

ⓘ global attributes: Any attributes permitted globally.
ⓘ name = string #: The name part of the name/value pair associated with this element for the purposes of form submission.
ⓘ disabled = "disabled" or "" (empty string) or empty #: Specifies that the element represents a disabled control.
ⓘ form = ID reference NEW #: The value of the id attribute on the form with which to associate the element.
type = "file" #: Specifies that its input element represents a list of file items.
ⓘ accept = list of MIME types #: Provides the UA with a hint of what file types the server is able to accept.; A set of comma-separated strings, each of which is a valid MIME type, with no parameters.
ⓘ autofocus = "autofocus" or "" (empty string) or empty NEW #: Specifies that the element represents a control to which a UA is meant to give focus as soon as the document is loaded.
ⓘ required = "required" or "" (empty string) or empty NEW #: Specifies that the element is a required part of form submission.
ⓘ multiple = "multiple" or "" (empty string) or empty NEW #: Specifies that the element allows multiple values.

Additional constraints and admonitions #

The interactive element input must not appear as a descendant of the a element.
The interactive element input must not appear as a descendant of the button element.
Any input element descendant of a label element with a for attribute must have an ID value that matches that for attribute.
The list attribute of the input element must refer to a datalist element.
Element input with attribute type whose value is “button” must have non-empty attribute value.
The usemap attribute on the input element is obsolete. Use the img element instead of the input element for image maps.
The align attribute on the input element is obsolete. Use CSS instead.

Tag omission #

The input element is a void element. An input element must have a start tag but must not have an end tag.

Permitted parent elements #

any element that can contain phrasing elements

DOM interface #

interface HTMLInputElement : HTMLElement {
           attribute DOMString accept;
           attribute DOMString alt;
           attribute DOMString autocomplete;
           attribute boolean autofocus;
           attribute boolean defaultChecked;
           attribute boolean checked;
           attribute DOMString dirName;
           attribute boolean disabled;
  readonly attribute HTMLFormElement? form;
  readonly attribute FileList? files;
           attribute DOMString formAction;
           attribute DOMString formEnctype;
           attribute DOMString formMethod;
           attribute boolean formNoValidate;
           attribute DOMString formTarget;
           attribute unsigned long height;
           attribute boolean indeterminate;
  readonly attribute HTMLElement? list;
           attribute DOMString max;
           attribute long maxLength;
           attribute DOMString min;
           attribute boolean multiple;
           attribute DOMString name;
           attribute DOMString pattern;
           attribute DOMString placeholder;
           attribute boolean readOnly;
           attribute boolean required;
           attribute unsigned long size;
           attribute DOMString src;
           attribute DOMString step;
           attribute DOMString type;
           attribute DOMString defaultValue;
           attribute DOMString value;
           attribute Date? valueAsDate;
           attribute unrestricted double valueAsNumber;
           attribute unsigned long width;

  void stepUp(optional long n);
  void stepDown(optional long n);

  readonly attribute boolean willValidate;
  readonly attribute ValidityState validity;
  readonly attribute DOMString validationMessage;
  boolean checkValidity();
  void setCustomValidity(DOMString error);

  readonly attribute NodeList labels;

  void select();
           attribute unsigned long selectionStart;
           attribute unsigned long selectionEnd;
           attribute DOMString selectionDirection;

  void setSelectionRange(unsigned long start, unsigned long end, optional DOMString direction);
};

HTML: The Markup Language (an HTML language reference)