Test500

HTML input element Interface

DOM Input objects expose the HTMLInputElement (or HTML 4 HTMLInputElement) interface, which provides special properties and methods (beyond the regular element object interface they also have available to them by inheritance) for manipulating the layout and presentation of input elements.

Properties

Name Type Description Availability
accept DOMString Reflects the accept HTML attribute, containing comma-separated list of file types accepted by the server when type is file. All
accessKey HTML 4 only DOMString A single character that switches input focus to the control.  in HTML5 All
align HTML 4 only DOMString Alignment of the element.  in HTML5 All
alt DOMString Reflects the alt HTML attribute, containing alternative text to use when type is image. All
autocomplete HTML5 DOMString Reflects the autocomplete HTML attribute, indicating whether the value of the control can be automatically completed by the browser. Ignored if the value of the type attribute is hidden, checkbox, radio, file, or a button type (button, submit, reset, image). Possible values are:
  • off: The user must explicitly enter a value into this field for every use, or the document provides its own auto-completion method; the browser does not automatically complete the entry.
  • on: The browser can automatically complete the value based on values that the user has entered during previous uses.
All
autofocus HTML5 Boolean Reflects the autofocus HTML attribute, which specifies that a form control should have input focus when the page loads, unless the user overrides it, for example by typing in a different control. Only one form element in a document can have the autofocus attribute. It cannot be applied if the type attribute is set to hidden (that is, you cannot automatically set focus to a hidden control). All
checked Boolean The current state of the element when type is checkbox or radio. All
defaultChecked Boolean The default state of a radio button or checkbox as originally specified in HTML that created this object. All
defaultValue DOMString The default value as originally specified in HTML that created this object. All
disabled Boolean Reflects the disabled HTML attribute, indicating that the control is not available for interaction. The input values will not be submitted with the form. See also readonly  All
files HTML5 Readonly FileList A list of selected files. All
form Readonly HTMLFormElement

The containing form element, if this element is in a form. If this element is not contained in a form element:

  • HTML5 this can be the id attribute of any <form> element in the same document. Even if the attribute is set on <input>, this property will be null, if it isn't the id of a <form> element.
  • HTML 4 this must be null.
All
formAction HTML5 DOMString Reflects the formaction HTML attribute, containing the URI of a program that processes information submitted by the element. If specified, this attribute overrides the action attribute of the <form> element that owns this element. All
formEncType HTML5 DOMString Reflects the formenctype HTML attribute, containing the type of content that is used to submit the form to the server. If specified, this attribute overrides the enctype attribute of the <form> element that owns this element. All
formMethod HTML5 DOMString Reflects the formmethod HTML attribute, containing the HTTP method that the browser uses to submit the form. If specified, this attribute overrides the method attribute of the <form> element that owns this element. All
formNoValidate HTML5 Boolean Reflects the formnovalidate HTML attribute, indicating that the form is not to be validated when it is submitted. If specified, this attribute overrides the novalidate attribute of the <form> element that owns this element. All
formTarget HTML5 DOMString Reflects the formtarget HTML attribute, containing a name or keyword indicating where to display the response that is received after submitting the form. If specified, this attribute overrides the target attribute of the <form> element that owns this element. All
height HTML5 DOMString Reflects the height HTML attribute, which defines the height of the image displayed for the button, if the value of type is image. All
indeterminate HTML5 Boolean Indicates that a checkbox is neither on nor off. All
labels HTML5Unimplemented (see bug 556743) readonly NodeList A list of <label> elements that are labels for this element. All
list HTML5 readonly HTMLElement Identifies a list of pre-defined options to suggest to the user. The value must be the id of a <datalist> element in the same document. The browser displays only options that are valid values for this input element. This attribute is ignored when the type attribute's value is hidden, checkbox, radio, file, or a button type. All
max HTML5 Unimplemented (see bug 559753) DOMString Reflects the max HTML attribute, containing the maximum (numeric or date-time) value for this item, which must not be less than its minimum (min attribute) value. All
maxLength  long

Reflects the maxlength HTML attribute, containing the maximum length of text (in Unicode code points) that the value can be changed to. The constraint is evaluated only when the value is changed

Note: If you set maxlength to a negative value programmatically, an exception will be thrown.
All
min HTML5 Unimplemented (see bug 559753) DOMString Reflects the min HTML attribute, containing the minimum (numeric or date-time) value for this item, which must not be greater than its maximum (max attribute) value. All
multiple HTML5   Reflects the multiple HTML attribute, indicating whether more than one value is possible (e.g., multiple files). All
name DOMString Reflects the name HTML attribute, containing a name that identifies the element when submitting the form. All
pattern HTML5 DOMString Reflects the pattern HTML attribute, containing a regular expression that the control's value is checked against. The pattern must match the entire value, not just some subset. Use the title attribute to describe the pattern to help the user. This attribute applies when the value of the type attribute is text, search, tel, url or email; otherwise it is ignored. All
placeholder HTML5  DOMString Reflects the placeholder HTML attribute, containing a hint to the user of what can be entered in the control. The placeholder text must not contain carriage returns or line-feeds. This attribute applies when the value of the type attribute is text, search, tel, url or email; otherwise it is ignored. All
readOnly Boolean

Reflects the readonly HTML attribute, indicating that the user cannot modify the value of the control.

HTML 5 This is ignored if the value of the type attribute is hidden, range, color, checkbox, radio, file, or a button type.

All
required HTML5 Boolean Reflects the required HTML attribute, indicating that the user must fill in a value before submitting a form. All
selectionDirection HTML5 DOMString The direction in which selection occurred. This is "forward" if selection was performed in the start-to-end direction of the current locale, or "backward" for the opposite direction. This can also be "none" if the direction is unknown." All
selectionEnd unsigned long The index of the end of selected text. All
selectionStart unsigned long The index of the beginning of selected text. All
size unsigned long Reflects the size HTML attribute, containing size of the control. This value is in pixels unless the value of type is text or password, in which case, it is an integer number of characters. HTML5 Applies only when type is set to text, search, tel, url, email, or password; otherwise it is ignored. All
src DOMString Reflects the src HTML attribute, which specifies a URI for the location of an image to display on the graphical submit button, if the value of type is image; otherwise it is ignored. All
step HTML5 Unimplemented (see bug 556009) DOMString Reflects the step HTML attribute, which works with min and max to limit the increments at which a numeric or date-time value can be set. It can be the string any or a positive floating point number. If this is not set to any, the control accepts only values at multiples of the step value greater than the minimum. All
tabIndex HTML 4 only long The position of the element in the tabbing navigation order for the current document. in HTML5 All
type Readonly DOMString Reflects the type HTML attribute, indicating the type of control to display. See type attribute of <input> for possible values. All
useMap HTML 4 only DOMString A client-side image map. in HTML5 All
validationMessage HTML5 Readonly DOMString A localized message that describes the validation constraints that the control does not satisfy (if any). This is the empty string if the control is not a candidate for constraint validation (willValidate is false), or it satisfies its constraints. All
validity HTML5 Readonly ValidityState The validity states that this element is in.  All
value DOMString Current value in the control. All
valueAsDate HTML5 Date The value of the element, interpreted as a date, or null if conversion is not possible. All
valueAsNumber HTML5 double

The value of the element, interpreted as one of the following in order:

  1. a time value
  2. a number
  3. null if conversion is not possible
All
width HTML5 DOMString Reflects the width HTML attribute, which defines the width of the image displayed for the button, if the value of type is image. All
willValidate HTML5 Boolean Indicates whether the element is a candidate for constraint validation. It is false if any conditions bar it from constraint validation. All

Methods

Name & Arguments Return Description Availability
blur() void Removes focus from input; keystrokes will subsequently go nowhere. All
checkValidity() HTML5 Boolean Returns false if the element is a candidate for constraint validation, and it does not satisfy its constraints. In this case, it also fires an invalid event at the element. It returns true if the element is not a candidate for constraint validation, or if it satisfies its constraints. All
click() void Simulates a click on the element. All
focus() void Focus on input; keystrokes will subsequently go to this element. All
mozGetFileNameArray(length, filenames) void Returns an array of all the file names from the input. All
mozSetFileNameArray(filenames, length) void Sets the filenames for the files selected on the input. All
select() void Selects the input text in the element, and focuses it so the user can subsequently replace the whole entry. All
setCustomValidity(error) HTML5 void Sets a custom validity message for the element. If this message is not the empty string, then the element is suffering from a custom validity error, and does not validate. All
setSelectionRange(selectionStart, selectionEnd, [optional] selectionDirection) void Selects a range of text in the element (but does not focus it). The optional selectionDirection parameter may be "forward" or "backward" to establish the direction in which selection was set, or "none"if the direction is unknown or not relevant. The default is "none". Specifying selectionDirection sets the value of the selectionDirection property. All
stepDown(n) HTML5Unimplemented void

Decrements the value by (step * n), where n defaults to 1 if not specified. Throws an INVALID_STATE_ERR exception:

  • if the method is not applicable to for the current type value.
  • if the element has no step value.
  • if the value cannot be converted to a number.
  • if the resulting value is above the max or below the min
All
stepUp(n) HTML5Unimplemented void

Increments the value by (step * n), where n defaults to 1 if not specified. Throws an INVALID_STATE_ERR exception:

  • if the method is not applicable to for the current type value.
  • if the element has no step value.
  • if the value cannot be converted to a number.
  • if the resulting value is above the max or below the min.
All

See also

Document Tags and Contributors

 Contributors to this page: lmorchard, ethertank, Joshua-S
 Last updated by: lmorchard,