Angular Form API

The Form widget represents fields of a data object as a collection of label-editor pairs. These pairs can be arranged in several groups, tabs and columns.

import { DxFormModule } from "devextreme-angular"

Type: DxFormTypes.default

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Properties

An object defining configuration options for the Form widget.

Name	Description
accessKey	Specifies the shortcut key that sets focus on the widget.
activeStateEnabled	Specifies whether or not the widget changes its state when interacting with a user.
alignItemLabels	Specifies whether or not all root item labels are aligned.
alignItemLabelsInAllGroups	Specifies whether or not item labels in all groups are aligned.
colCount	The count of columns in the form layout.
colCountByScreen	Specifies dependency between the screen factor and the count of columns in the form layout.
customizeItem	Specifies a function that customizes a form item after it has been created.
disabled	Specifies whether the widget responds to user interaction.
elementAttr	Specifies the attributes to be attached to the widget's root element.
focusStateEnabled	Specifies whether the widget can be focused using keyboard navigation.
formData	Provides the Form's data. Gets updated every time form fields change.
height	Specifies the widget's height.
hint	Specifies text for a hint that appears when a user pauses on the widget.
hoverStateEnabled	Specifies whether the widget changes its state when a user pauses on it.
items	Holds an array of form items.
labelLocation	Specifies the location of a label against the editor.
minColWidth	The minimum column width used for calculating column count in the form layout.
onContentReady	A function that is executed when the widget's content is ready and each time the content is changed.
onDisposing	A function that is executed before the widget is disposed of.
onEditorEnterKey	A function that is executed when the Enter key has been pressed while an editor is focused.
onFieldDataChanged	A function that is executed when the value of a formData object field is changed.
onInitialized	A function used in JavaScript frameworks to save the widget instance.
onOptionChanged	A function that is executed after a widget option is changed.
optionalMark	The text displayed for optional fields.
readOnly	Specifies whether all editors on the form are read-only. Applies only to non-templated items.
requiredMark	The text displayed for required fields.
requiredMessage	Specifies the message that is shown for end-users if a required field value is not specified.
rtlEnabled	Switches the widget to a right-to-left representation.
screenByWidth	Specifies a function that categorizes screens by their width.
scrollingEnabled	A Boolean value specifying whether to enable or disable form scrolling.
showColonAfterLabel	Specifies whether or not a colon is displayed at the end of form labels.
showOptionalMark	Specifies whether or not the optional mark is displayed for optional fields.
showRequiredMark	Specifies whether or not the required mark is displayed for required fields.
showValidationSummary	Specifies whether or not the total validation summary is displayed on the form.
tabIndex	Specifies the number of the element when the Tab key is used for navigating.
validationGroup	Gives a name to the internal validation group.
visible	Specifies whether the widget is visible.
width	Specifies the widget's width.

Methods

This section describes members used to manipulate a widget.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
defaultOptions(rule)	Specifies the device-dependent default configuration options for this component.
dispose()	Disposes of all the resources allocated to the Form instance.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
focus()	Sets focus on the widget.
getButton(name)	Gets a button's instance.
getEditor(dataField)	Gets an editor instance. Takes effect only if the form item is visible.
getInstance(element)	Gets the instance of a widget found using its DOM node.
instance()	Gets the widget's instance. Use it to access other methods of the widget.
itemOption(id)	Gets a form item's configuration.
itemOption(id, option, value)	Updates the value of a single item option.
itemOption(id, options)	Updates the values of several item options.
off(eventName)	Detaches all event handlers from a single event.
off(eventName, eventHandler)	Detaches a particular event handler from a single event.
on(eventName, eventHandler)	Subscribes to an event.
on(events)	Subscribes to events.
option()	Gets all widget options.
option(optionName)	Gets the value of a single option.
option(optionName, optionValue)	Updates the value of a single option.
option(options)	Updates the values of several options.
registerKeyHandler(key, handler)	Registers a handler to be executed when a user presses a specific key.
repaint()	Repaints the widget without reloading data. Call it to update the widget's markup.
resetOption(optionName)	Resets an option to its default value.
resetValues()	Resets the editor's value to undefined.
updateData(data)	Merges the passed `data` object with formData. Matching properties in formData are overwritten and new properties added.
updateData(dataField, value)	Updates a formData field and the corresponding editor.
updateDimensions()	Updates the dimensions of the widget contents.
validate()	Validates the values of all editors on the form against the list of the validation rules specified for each form item.

Events

This section describes events fired by this widget.

Name	Description
contentReady	Raised when the widget's content is ready.
disposing	Raised before the widget is disposed of.
editorEnterKey	Raised when the Enter key has been pressed while an editor is focused.
fieldDataChanged	Raised when the value of a formData object field is changed.
initialized	Raised only once, after the widget is initialized.
optionChanged	Raised after a widget option is changed.

Item Types

This section describes item types available in the Form widget.

Name	Description
ButtonItem	Configures a button form item.
EmptyItem	This article describes configuration options of an empty form item.
GroupItem	This article describes configuration options of a group form item.
SimpleItem	This article describes configuration options of a simple form item.
TabbedItem	This article describes configuration options of a tabbed form item.

Angular Form API

See Also

Properties

See Also

Methods

See Also

Events

See Also

Item Types