Angular Form API

The Form UI component 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"

Selector: dx-form

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Properties

An object defining configuration properties for the Form UI component.

Name	Description
accessKey	Specifies the shortcut key that sets focus on the UI component.
activeStateEnabled	Specifies whether the UI component changes its state as a result of user interaction.
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 UI component responds to user interaction.
elementAttr	Specifies the global attributes to be attached to the UI component's container element.
focusStateEnabled	Specifies whether the UI component can be focused using keyboard navigation.
formData	Provides the Form's data. Gets updated every time form fields change.
height	Specifies the UI component's height.
hint	Specifies text for a hint that appears when a user pauses on the UI component.
hoverStateEnabled	Specifies whether the UI component 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. Applies only if colCount property is "auto".
onContentReady	A function that is executed when the UI component's content is ready and each time the content is changed.
onDisposing	A function that is executed before the UI component 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 UI component instance.
onOptionChanged	A function that is executed after a UI component property 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 UI component 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 UI component is visible.
width	Specifies the UI component's width.

Methods

This section describes members used to manipulate a UI component.

Name	Description
beginUpdate()	Prevents the UI component from refreshing until the endUpdate() method is called.
defaultOptions(rule)	Specifies the device-dependent default configuration properties for this component.
dispose()	Disposes of all the resources allocated to the Form instance.
element()	Gets the root UI component element.
endUpdate()	Refreshes the UI component after a call of the beginUpdate() method.
focus()	Sets focus on the UI component.
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 UI component found using its DOM node.
instance()	Gets the UI component's instance. Use it to access other methods of the UI component.
itemOption(id)	Gets a form item's configuration.
itemOption(id, options)	Updates the values of several item properties.
itemOption(id, option, value)	Updates the value of a single item option.
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 UI component properties.
option(optionName)	Gets the value of a single property.
option(optionName, optionValue)	Updates the value of a single property.
option(options)	Updates the values of several properties.
registerKeyHandler(key, handler)	Registers a handler to be executed when a user presses a specific key.
repaint()	Repaints the UI component without reloading data. Call it to update the UI component's markup.
resetOption(optionName)	Resets a property 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 UI component 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 UI component.

Name	Description
contentReady	Raised when the UI component's content is ready.
disposing	Raised before the UI component 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 UI component is initialized.
optionChanged	Raised after a UI component property is changed.

Item Types

This section describes item types available in the Form UI component.

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

Angular Form API

See Also

Properties

See Also

Methods

See Also

Events

See Also

Item Types