Class HTMLFieldSetElement
- Namespace
- CSharpToJavaScript.APIs.JS
- Assembly
- CSharpToJavaScript.dll
The HTMLFieldSetElement interface provides special properties and methods (beyond the regular HTMLElement interface it also has available to it by inheritance) for manipulating the layout and presentation of {{ HTMLElement("fieldset") }} elements.
[Value("HTMLFieldSetElement")]
public class HTMLFieldSetElement : HTMLElement- Inheritance
-
HTMLFieldSetElement
- Inherited Members
Remarks
-The HTML element implementing this interface: fieldset.
Constructors
HTMLFieldSetElement()
public HTMLFieldSetElement()Properties
Disabled
The disabled property of the HTMLFieldSetElement interface is a boolean value that reflects the {{htmlelement("fieldset")}} element's disabled attribute, which indicates whether the control is disabled.
[Value("disabled")]
public bool Disabled { get; set; }Property Value
- bool
A boolean value.
Remarks
When disabled, all the form control descendants of the <fieldset> element, excluding elements that are descendants of the legend child of the <fieldset>, if any, are disabled. A disabled element is unusable and un-clickable, and match the :disabled selector, even if their disabled property value is false.
-HTML disabled attribute
-CSS :disabled and :enabled pseudoclasses
Elements
The elements read-only property of the HTMLFieldSetElement interface returns an HTMLCollection object containing all form control elements ({{htmlelement("button")}}, {{htmlelement("fieldset")}}, {{htmlelement("input")}}, {{htmlelement("object")}}, {{htmlelement("output")}}, {{htmlelement("select")}}, and {{htmlelement("textarea")}}) that are descendants of this field set.
[Value("elements")]
public HTMLCollection Elements { get; }Property Value
Remarks
You can access a particular form control in the returned collection by using either an
index or the element's name or id attributes. If multiple form controls share the same name, as is common with a group of radio buttons, using the shared name returns the first element with that value.
Form
The form read-only property of the HTMLFieldSetElement interface returns an HTMLFormElement object that owns this {{htmlelement("fieldset")}}, or null if this fieldset is not owned by any form.
[Value("form")]
public HTMLFormElement? Form { get; }Property Value
- HTMLFormElement
An HTMLFormElement or
null.
Remarks
-HTMLFieldSetElement
-HTMLFormElement
-fieldset
-HTML form attribute
-HTML forms guide
Name
The name property of the HTMLFieldSetElement interface indicates the name of the {{HTMLElement("fieldset")}} element. It reflects the element's name attribute.
[Value("name")]
public string Name { get; set; }Property Value
- string
A string representing the element's name.
Remarks
Type
The type read-only property of the HTMLFieldSetElement interface returns the string "fieldset".
[Value("type")]
public string Type { get; }Property Value
- string
The string
"fieldset".
Remarks
ValidationMessage
The validationMessage read-only property of the HTMLFieldSetElement interface returns a string representing a localized message that describes the validation constraints that the {{htmlelement("fieldset")}} control does not satisfy (if any). This is the empty string as <fieldset> elements are not candidates for constraint validation (WillValidate is false).
[Value("validationMessage")]
public string ValidationMessage { get; }Property Value
- string
The empty string,
"";
Remarks
-fieldset
-HTMLFieldSetElement
-WillValidate
-Validity
-CheckValidity()
-ReportValidity()
-SetCustomValidity(string)
-Learn: Client-side form validation
-Guide: Constraint validation
-CSS :valid and :invalid pseudo-classes
Validity
The validity read-only property of the HTMLFieldSetElement interface returns a ValidityState object that represents the validity states this element is in. Although {{HTMLElement("fieldset")}} elements are never candidates for constraint validation, the validity state may still be invalid if a custom validity message has been set.
[Value("validity")]
public ValidityState Validity { get; }Property Value
- ValidityState
A ValidityState object.
Remarks
NOTE
The :valid and :invalid CSS pseudo-classes are applied to
<fieldset>elements based on the validity of its descendant form controls, not the fieldset itself.
-CheckValidity()
-fieldset
-form
-Learn: Client-side form validation
-Guide: Constraint validation
WillValidate
The willValidate read-only property of the HTMLFieldSetElement interface returns false, because fieldset elements are not candidates for constraint validation.
[Value("willValidate")]
public bool WillValidate { get; }Property Value
- bool
The boolean value
false.
Remarks
Methods
CheckValidity()
The checkValidity() method of the HTMLFieldSetElement interface checks if the element is valid, but always returns true because {{HTMLElement("fieldset")}} elements are never candidates for constraint validation.
[Value("checkValidity")]
public bool CheckValidity()Returns
- bool
A boolean value,
true.
Remarks
NOTE
The :valid and :invalid CSS pseudo-classes are applied to
<fieldset>elements based on the validity of its descendant form controls, not the fieldset itself.
-ReportValidity()
-fieldset
-form
-Learn: Client-side form validation
-Guide: Constraint validation
ReportValidity()
The reportValidity() method of the HTMLFieldSetElement interface performs the same validity checking steps as the CheckValidity() method. It always returns true because {{HTMLElement("fieldset")}} elements are never candidates for constraint validation.
[Value("reportValidity")]
public bool ReportValidity()Returns
- bool
A boolean value,
true.
Remarks
SetCustomValidity(string)
The setCustomValidity() method of the HTMLFieldSetElement interface sets the custom validity message for the {{htmlelement("fieldset")}} element. Use the empty string to indicate that the element does not have a custom validity error.
[Value("setCustomValidity")]
public GlobalObject.Undefined SetCustomValidity(string error)Parameters
errorstring
Returns
Remarks
The <fieldset> element is not a candidate for constraint validation. The ReportValidity() method will not cause the custom error message to be displayed to the user, but does set the CustomError property of the element's ValidityState object to true and the Valid property to false.
-fieldset
-HTMLFieldSetElement
-Validity
-CheckValidity()
-ReportValidity()
-Form validation.
-Learn: Client-side form validation
-Guide: Constraint validation
-CSS :valid and :invalid pseudo-classes