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Text Area
Documentation
The TextArea is a UI component that enables a user to enter and edit a multi-line text.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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<div class="dx-fieldset">
<div class="dx-fieldset-header">Default Mode</div>
<div class="dx-field">
<dx-check-box
[value]="false"
(onValueChanged)="onCheckboxValueChanged($event)"
text="Limit text length">
</dx-check-box>
</div>
</div>
<div class="left-content">
<dx-text-area
[height]="90"
[maxLength]="maxLength"
[(value)]="value">
</dx-text-area>
</div>
<div class="full-width-content">
<div class="dx-fieldset">
<div class="dx-fieldset-header">Event Handling and API</div>
<div class="dx-field">
<div class="dx-field-label">Synchronize text areas </div>
<div class="dx-field-value">
<dx-select-box
[items]="valueChangeEvents"
valueExpr="name"
displayExpr="title"
[(value)]="eventValue">
</dx-select-box>
</div>
</div>
</div>
<dx-text-area
[height]="90"
[(value)]="valueForEditableTextArea"
[valueChangeEvent]="eventValue">
</dx-text-area>
<dx-text-area
[height]="90"
[readOnly]="true"
[(value)]="valueForEditableTextArea">
</dx-text-area>
</div>
import { Component, NgModule, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxTextAreaModule, DxCheckBoxModule, DxSelectBoxModule } from 'devextreme-angular';
import { Service } from './app.service';
if(!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
selector: 'demo-app',
templateUrl: 'app/app.component.html',
styleUrls: ['app/app.component.css'],
providers: [Service]
})
export class AppComponent {
valueChangeEvents: any[];
eventValue: string;
maxLength = null;
value: string;
valueForEditableTextArea: string;
constructor(private service: Service) {
this.valueForEditableTextArea = this.service.getContent();
this.value = this.service.getContent();
this.valueChangeEvents = [{
title: 'On Blur',
name: 'change'
}, {
title: 'On Key Up',
name: 'keyup'
}];
this.eventValue = this.valueChangeEvents[0].name;
}
onCheckboxValueChanged(e) {
if (e.value) {
this.value = this.service.getContent().substring(0, 100);
this.maxLength = 100;
} else {
this.value = this.service.getContent();
this.maxLength = null;
}
}
}
@NgModule({
imports: [
BrowserModule,
DxTextAreaModule,
DxCheckBoxModule,
DxSelectBoxModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .full-width-content {
width: 100%;
margin-top: 30px;
}
::ng-deep .full-width-content > .dx-widget {
margin-bottom: 20px;
}
::ng-deep .full-width-content .dx-field {
max-width: 385px;
}
import { Injectable } from "@angular/core";
let content = "Prepare 2013 Marketing Plan: We need to double revenues in 2013 and our marketing strategy is going to be key here. R&D is improving existing products and creating new products so we can deliver great AV equipment to our customers.Robert, please make certain to create a PowerPoint presentation for the members of the executive team.";
@Injectable()
export class Service {
getContent(){
return content;
}
}
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "system",
emitDecoratorMetadata: true,
experimentalDecorators: true
},
meta: {
'typescript': {
"exports": "ts"
},
'devextreme/localization.js': {
"esModule": true
}
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.5.3/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib@2.1.0/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.5',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.8/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.11',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.18',
'devextreme-angular': 'npm:devextreme-angular@20.2.5',
'preact': 'npm:preact@10.5.11/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.11/hooks/dist/hooks.js'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular/*/package.json",
"npm:devextreme-angular/ui/*/package.json",
"npm:devextreme-angular/package.json",
"npm:devexpress-diagram/package.json",
"npm:devexpress-gantt/package.json",
]
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app').catch(console.error.bind(console));
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
</body>
</html>