JavaScript/jQuery TextArea Options
See Also
accessKey
The value of this property will be passed to the accesskey
attribute of the HTML element that underlies the UI component.
activeStateEnabled
The UI component switches to the active state when users press down the primary mouse button. When this property is set to true, the CSS rules for the active state apply. You can change these rules to customize the component.
Use this property when you display the component on a platform whose guidelines include the active state change for UI components.
autoResizeEnabled
Use the minHeight and maxHeight properties to set the height that the adapted TextArea can occupy. minHeight specifies the initial height. For more information, refer to the following article: Adapt the Size of the Text Area.
Note that the height property is not in effect if autoResizeEnabled is set to true.
elementAttr
Specifies the global attributes to be attached to the UI component's container element.
jQuery
$(function(){ $("#textAreaContainer").dxTextArea({ // ... elementAttr: { id: "elementId", class: "class-name" } }); });
Angular
<dx-text-area ... [elementAttr]="{ id: 'elementId', class: 'class-name' }"> </dx-text-area>
import { DxTextAreaModule } from "devextreme-angular"; // ... export class AppComponent { // ... } @NgModule({ imports: [ // ... DxTextAreaModule ], // ... })
Vue
<template> <DxTextArea ... :element-attr="textAreaAttributes"> </DxTextArea> </template> <script> import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxTextArea }, data() { return { textAreaAttributes: { id: 'elementId', class: 'class-name' } } } } </script>
React
import React from 'react'; import TextArea from 'devextreme-react/text-area'; class App extends React.Component { textAreaAttributes = { id: 'elementId', class: 'class-name' } render() { return ( <TextArea ... elementAttr={this.textAreaAttributes}> </TextArea> ); } } export default App;
height
This property accepts a value of one of the following types:
Number
The height in pixels.String
A CSS-accepted measurement of height. For example,"55px"
,"20vh"
,"80%"
,"inherit"
.Function (deprecated since v21.2)
Refer to the W0017 warning description for information on how you can migrate to viewport units.
The TextArea can have a fixed or resizable height. Components with a fixed height displays a native scroll bar if the entered text exceeds the text area. You can customize this scroll bar only with CSS rules.
inputAttr
jQuery
$(function(){ $("#textAreaContainer").dxTextArea({ // ... inputAttr: { id: "inputId" } }); });
Angular
<dx-text-area ... [inputAttr]="{ id: 'inputId' }"> </dx-text-area>
import { DxTextAreaModule } from "devextreme-angular"; // ... export class AppComponent { // ... } @NgModule({ imports: [ // ... DxTextAreaModule ], // ... })
Vue
<template> <DxTextArea :input-attr="inputAttr" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxTextArea }, data() { return { inputAttr: { id: 'inputId' } } } } </script>
React
import 'devextreme/dist/css/dx.light.css'; import TextArea from 'devextreme-react/text-area'; const inputAttr = { id: 'inputId' }; export default function App() { return ( <TextArea inputAttr={inputAttr} /> ); }
ASP.NET MVC Controls
@(Html.DevExtreme().TextArea() .InputAttr("id", "inputId") // ===== or ===== .InputAttr(new { @id = "inputId" }) // ===== or ===== .InputAttr(new Dictionary<string, object>() { { "id", "inputId" } }) )
@(Html.DevExtreme().TextArea() _ .InputAttr("id", "inputId") ' ===== or ===== .InputAttr(New With { .id = "inputId" }) ' ===== or ===== .InputAttr(New Dictionary(Of String, Object) From { { "id", "inputId" } }) )
To improve accessibility, use this property to specify aria-label for the component.
jQuery
$(function(){ $("#textAreaContainer").dxTextArea({ // ... inputAttr: { 'aria-label': 'your-label', }, }); });
Angular
<dx-text-area ... [inputAttr]="{ 'aria-label': 'your-label' }"> </dx-text-area>
Vue
<template> <DxTextArea :input-attr="inputAttr" /> </template> <script> import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxTextArea }, data() { return { inputAttr: { 'aria-label': 'your-label' } } } } </script>
React
import TextArea from 'devextreme-react/text-area'; const inputAttr = { 'aria-label': 'your-label' }; export default function App() { return ( <TextArea inputAttr={inputAttr} /> ); }
You do not need to specify aria-label
if you use label.
isValid
See Also
labelMode
Specifies the label's display mode.
This property can have one of the following values:
labelMode | Description | Illustration |
---|---|---|
"static" | The label is displayed above the input field. | |
"floating" | The label is used as a placeholder, but when the editor gets focus, the label moves to the position above the input field. |
|
"hidden" | The label is hidden. |
If autofill is enabled in the browser, we do not recommend that you use "floating" mode. The autofill values will overlap the label when it is displayed as a placeholder. Use "static" mode instead.
onChange
A function that is executed when the UI component loses focus after the text field's content was changed using the keyboard.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onContentReady
A function that is executed when the UI component is rendered and each time the component is repainted.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
model | any |
Model data. Available only when using Knockout. |
onCopy
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onCut
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onDisposing
A function that is executed before the UI component is disposed of.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
model | any |
Model data. Available only if you use Knockout. |
onEnterKey
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onFocusIn
Name | Type | Description |
---|---|---|
model | any |
Model data. Available only if Knockout is used. |
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
component |
The UI component's instance. |
onFocusOut
Name | Type | Description |
---|---|---|
model | any |
Model data. Available only if Knockout is used. |
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
component |
The UI component's instance. |
onInitialized
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
See Also
jQuery
Angular
Vue
React
onInput
A function that is executed each time the UI component's input is changed while the UI component is focused.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onKeyDown
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onKeyUp
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onOptionChanged
Name | Type | Description |
---|---|---|
model | any |
Model data. Available only if you use Knockout. |
fullName |
The path to the modified property that includes all parent properties. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
component |
The UI component's instance. |
|
name |
The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into. |
|
value | any |
The modified property's new value. |
previousValue | any |
The UI component's previous value. |
The following example shows how to subscribe to component property changes:
jQuery
$(function() { $("#textAreaContainer").dxTextArea({ // ... onOptionChanged: function(e) { if(e.name === "changedProperty") { // handle the property change here } } }); });
Angular
<dx-text-area ... (onOptionChanged)="handlePropertyChange($event)"> </dx-text-area>
import { Component } from '@angular/core'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { // ... handlePropertyChange(e) { if(e.name === "changedProperty") { // handle the property change here } } }
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxTextAreaModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, DxTextAreaModule ], providers: [ ], bootstrap: [AppComponent] }) export class AppModule { }
Vue
<template> <DxTextArea ... @option-changed="handlePropertyChange" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxTextArea from 'devextreme-vue/text-area'; export default { components: { DxTextArea }, // ... methods: { handlePropertyChange: function(e) { if(e.name === "changedProperty") { // handle the property change here } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import TextArea from 'devextreme-react/text-area'; const handlePropertyChange = (e) => { if(e.name === "changedProperty") { // handle the property change here } } export default function App() { return ( <TextArea ... onOptionChanged={handlePropertyChange} /> ); }
onPaste
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. |
model | any |
Model data. Available only if Knockout is used. |
onValueChanged
A function that is executed after the UI component's value is changed.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. This field is undefined if the value is changed programmatically. |
model | any |
Model data. Available only if Knockout is used. |
previousValue |
The UI component's previous value. |
|
value |
The UI component's new value. |
placeholder
Specifies a text string displayed when the editor's value is empty.
readOnly
When this property is set to true, the following applies:
- The editor's value cannot be changed using the UI.
- Built-in action buttons are invisible.
Custom action buttons are visible but disabled. If a button should not be disabled, set its disabled property to false:
jQuery
index.js$(function() { $("#textAreaContainer").dxTextArea({ // ... buttons: [{ name: "myCustomButton", location: "after", options: { onClick: function(e) { // ... }, disabled: false } }] }); });
Angular
app.component.htmlapp.component.tsapp.module.ts<dx-text-area ... > <dxi-button name="myCustomButton" location="after" [options]="myCustomButtonConfig"> </dxi-button> </dx-text-area>
import { Component } from '@angular/core'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { myCustomButtonConfig = { onClick: (e) => { // ... }, disabled: false }; }
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxTextAreaModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, DxTextAreaModule ], providers: [ ], bootstrap: [AppComponent] }) export class AppModule { }
Vue
App.vue<template> <DxTextArea ... > <DxTextAreaButton name="myCustomButton" location="after" :options="myCustomButtonConfig" /> </DxTextArea> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxTextArea, { DxButton as DxTextAreaButton } from 'devextreme-vue/text-area'; export default { components: { DxTextArea, DxTextAreaButton }, data() { return { myCustomButtonConfig: { onClick: (e) => { // ... }, disabled: false } } } } </script>
React
App.jsimport React from 'react'; import 'devextreme/dist/css/dx.light.css'; import TextArea, { Button as TextAreaButton } from 'devextreme-react/text-area'; class App extends React.Component { myCustomButtonConfig = { onClick: (e) => { // ... }, disabled: false }; render() { return ( <TextArea> <TextAreaButton name="myCustomButton" location="after" options={this.myCustomButtonConfig} /> </TextArea> ); } } export default App;
You can also hide a custom action button when the UI component becomes read-only. Set the button's visible property to false in the onOptionChanged function. To get the button, use the getButton(name) method:
jQuery
index.js$(function() { $("#textAreaContainer").dxTextArea({ // ... buttons: [{ name: "myCustomButton", // ... }], onOptionChanged: function(e) { if(e.name == "readOnly") { const myButton = e.component.getButton("myCustomButton"); myButton.option("visible", !e.value); // Hide the button when readOnly: true } } }); });
Angular
app.component.htmlapp.component.tsapp.module.ts<dx-text-area ... (onOptionChanged)="changeButtonState"> <dxi-button name="myCustomButton" ... ></dxi-button> </dx-text-area>
import { Component } from '@angular/core'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { changeButtonState(e) { if(e.name == 'readOnly') { let myButton = e.component.getButton('myCustomButton'); myButton.option('visible', !e.value); // Hide the button when readOnly: true } } }
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { DxTextAreaModule } from 'devextreme-angular'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, DxTextAreaModule ], providers: [ ], bootstrap: [AppComponent] }) export class AppModule { }
Vue
App.vue<template> <DxTextArea ... @option-changed="changeButtonState"> <DxTextAreaButton name="myCustomButton" ... /> </DxTextArea> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxTextArea, { DxButton as DxTextAreaButton } from 'devextreme-vue/text-area'; export default { components: { DxTextArea, DxTextAreaButton }, data() { return { // ... } }, methods: { changeButtonState(e) { if(e.name == 'readOnly') { let myButton = e.component.getButton('myCustomButton'); myButton.option('visible', !e.value); // Hide the button when readOnly: true } } } } </script>
React
App.jsimport React from 'react'; import 'devextreme/dist/css/dx.light.css'; import TextArea, { Button as TextAreaButton } from 'devextreme-react/text-area'; class App extends React.Component { changeButtonState(e) { if(e.name == 'readOnly') { let myButton = e.component.getButton('myCustomButton'); myButton.option('visible', !e.value); // Hide the button when readOnly: true } } render() { return ( <TextArea ... onOptionChanged={this.changeButtonState}> <TextAreaButton name="myCustomButton" ... /> </TextArea> ); } } export default App;
rtlEnabled
When this property is set to true, the UI component text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.
DevExpress.config({ rtlEnabled: true });
stylingMode
The following styles are available:
You can also use the global editorStylingMode setting to specify how the text fields of all editors in your application are styled.
tabIndex
The value of this property will be passed to the tabindex
attribute of the HTML element that underlies the UI component.
validationError
Information on the broken validation rule. Contains the first item from the validationErrors array.
validationMessageMode
Specifies how the message about the validation rules that are not satisfied by this editor's value is displayed.
validationStatus
The following table illustrates the validation status indicators:
validationStatus | Indicator |
---|---|
"pending" |
|
"valid" |
|
"invalid" |
When you assign "invalid" to validationStatus, you can also use the validationErrors array to set an error message as shown below:
jQuery
$(function() { const textArea = $("#textAreaContainer").dxTextArea({ // ... }).dxTextArea("instance"); function setInvalidStatus(message) { textArea.option({ validationStatus: "invalid", validationErrors: [{ message: message }] }); } });
Angular
<dx-text-area [validationStatus]="validationStatus" [validationErrors]="validationErrors"> </dx-text-area>
// ... export class AppComponent { validationStatus: string = "valid"; validationErrors: any; // ... setInvalidStatus(message) { this.validationStatus = "invalid"; this.validationErrors = [{ message: message }]; } }
Vue
<template> <DxTextArea ... :validation-status="validationStatus" :validation-errors="validationErrors" /> </template> <script> // ... export default { // ... data() { return { validationStatus: "valid", validationErrors: [] } }, methods: { setInvalidStatus(message) { this.validationStatus = "invalid"; this.validationErrors = [{ message: message }]; } } } </script>
React
import React, { useState } from 'react'; // ... function App() { const [validationStatus, setValidationStatus] = useState("valid"); const [validationErrors, setValidationErrors] = useState([]); const setInvalidStatus = message => { setValidationStatus("invalid"); setValidationErrors([{ message: message }]); } return ( <TextArea validationStatus={validationStatus} validationErrors={validationErrors} /> ); }; export default App;
valueChangeEvent
Specifies the DOM events after which the UI component's value should be updated.
This property accepts a single event name or several names separated by spaces.
The recommended events are "keyup", "blur", "change", "input", and "focusout", but you can use other events as well.
See Also
width
This property accepts a value of one of the following types:
Number
The width in pixels.String
A CSS-accepted measurement of width. For example,"55px"
,"20vw"
,"80%"
,"auto"
,"inherit"
.Function (deprecated since v21.2)
Refer to the W0017 warning description for information on how you can migrate to viewport units.
If you have technical questions, please create a support ticket in the DevExpress Support Center.