HTML5: input type=radio

Permitted contents #

empty (void element)

Permitted attributes #

global attributes & name & disabled & form & type★ & checked & value & autofocus & required

ⓘ 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 = "radio" #: Specifies that its input element represents a selection of one item from a list of items.
ⓘ checked = "checked" or "" (empty string) or empty #: Specifies that the element represents a selected control.
ⓘ value = string #: Specifies a value for the input element.
ⓘ 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.

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.
The usemap attribute on the input element is obsolete.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The align attribute on the input element is obsolete.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 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 DOMString 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 double valueAsNumber;
  readonly attribute HTMLOptionElement selectedOption;
           attribute DOMString width;

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

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

  readonly attribute NodeList labels;

  void select();
           attribute unsigned long selectionStart;
           attribute unsigned long selectionEnd;
  void setSelectionRange(in unsigned long start, in unsigned long end);
};

HTML: The Markup Language Reference

ⓘ input type=radio – radio button # T

Permitted contents #

Permitted attributes #

Additional constraints and admonitions #

Tag omission #

Permitted parent elements #

DOM interface #