React 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.
See Also
jQuery
Angular
Vue
React
Configuration
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 all item labels are aligned. Applies only to labels outside their editors (see labelMode). |
alignItemLabelsInAllGroups |
Specifies whether item labels in all groups are aligned. Applies only to labels outside their editors (see labelMode). |
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. Applies only to labels outside their editors (see labelMode). |
labelMode |
Specifies a display mode for item labels. |
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 is rendered and each time the component is repainted. |
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. Applies only if showOptionalMark is true. |
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 a colon is displayed at the end of form labels. Applies only to labels outside their editors (see labelMode). |
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. |
See Also
Methods
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 |
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
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
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. |
If you have technical questions, please create a support ticket in the DevExpress Support Center.