Backend API
<div class="speech-to-text-demo">
<div class="speech-to-text-container">
<span>Use voice recognition (speech to text)</span>
<dx-speech-to-text
id="speech-to-text"
[class.animation-disabled]="!animation"
[class.custom-button]="displayMode === 'Custom'"
[startText]="startText"
[stopText]="stopText"
[stylingMode]="stylingMode"
[type]="type"
[hint]="hint"
[disabled]="disabled"
[speechRecognitionConfig]="speechRecognitionConfig"
(onStartClick)="onStartClick()"
(onResult)="onResult($event)"
(onEnd)="onEnd()"
></dx-speech-to-text>
<dx-text-area
id="text-area"
[(value)]="textAreaValue"
[width]="360"
[height]="120"
placeholder="Recognized text will appear here..."
[inputAttr]="{ 'aria-label': 'Recognized Text' }"
></dx-text-area>
<dx-button
text="Clear"
[disabled]="textAreaValue === ''"
(onClick)="onClearButtonClick($event)"
></dx-button>
</div>
<div class="options">
<div class="caption">Options</div>
<div class="option">
<div>Display Mode</div>
<dx-select-box
[(value)]="displayMode"
[dataSource]="displayModes"
[inputAttr]="{ 'aria-label': 'Display Mode' }"
(onValueChanged)="onDisplayModeChanged($event)"
></dx-select-box>
</div>
<div class="option">
<div>Styling Mode</div>
<dx-select-box
[(value)]="stylingMode"
[dataSource]="stylingModes"
displayExpr="displayValue"
valueExpr="value"
[disabled]="displayMode === 'Custom'"
[inputAttr]="{ 'aria-label': 'Styling Mode' }"
></dx-select-box>
</div>
<div class="option">
<div>Type</div>
<dx-select-box
[(value)]="type"
[dataSource]="types"
displayExpr="displayValue"
valueExpr="value"
[disabled]="displayMode === 'Custom'"
[inputAttr]="{ 'aria-label': 'Type' }"
></dx-select-box>
</div>
<div class="switch">
<dx-switch [(value)]="disabled"></dx-switch>
<span>Disabled</span>
</div>
<div class="option-separator"></div>
<div class="option">
<div>Language</div>
<dx-select-box
[(value)]="language"
[dataSource]="languages"
[inputAttr]="{ 'aria-label': 'Language' }"
(onValueChanged)="updateSpeechRecognitionConfig()"
></dx-select-box>
</div>
<div class="switch">
<dx-switch
[(value)]="interimResults"
(onValueChanged)="updateSpeechRecognitionConfig()"
></dx-switch>
<span>Interim Results</span>
</div>
<div class="switch">
<dx-switch
[(value)]="continuous"
(onValueChanged)="updateSpeechRecognitionConfig()"
></dx-switch>
<span>Continuous Recognition</span>
</div>
<div class="option-separator"></div>
<div class="switch">
<dx-switch [(value)]="animation"></dx-switch>
<span>Animation</span>
</div>
</div>
</div>
import { bootstrapApplication } from '@angular/platform-browser';
import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core';
import { DxSpeechToTextModule } from 'devextreme-angular/ui/speech-to-text';
import { DxTextAreaModule } from 'devextreme-angular/ui/text-area';
import { DxButtonModule } from 'devextreme-angular/ui/button';
import { DxSelectBoxModule } from 'devextreme-angular/ui/select-box';
import { DxSwitchModule } from 'devextreme-angular/ui/switch';
import notify from 'devextreme/ui/notify';
import { AppService } from './app.service';
declare global {
interface Window {
SpeechRecognition?: any;
webkitSpeechRecognition?: any;
}
}
if (!/localhost/.test(document.location.host)) {
enableProdMode();
}
let modulePrefix = '';
// @ts-ignore
if (window && window.config?.packageConfigPaths) {
modulePrefix = '/app';
}
@Component({
selector: 'demo-app',
templateUrl: `app/app.component.html`,
styleUrls: [`app/app.component.css`],
imports: [
DxSpeechToTextModule,
DxTextAreaModule,
DxButtonModule,
DxSelectBoxModule,
DxSwitchModule,
],
})
export class AppComponent {
state: 'initial' | 'listening';
startText: string;
stopText: string;
displayMode: string;
displayModes: string[];
stylingMode: string;
stylingModes: { displayValue: string; value: string }[];
type: string;
types: { displayValue: string; value: string }[];
hint: string;
disabled: boolean;
textAreaValue: string;
language: string;
languages: string[];
langMap: { [key: string]: string };
interimResults: boolean;
continuous: boolean;
animation: boolean;
speechRecognitionConfig: Record<string, unknown>;
constructor(private readonly appService: AppService) {
this.state = 'initial';
this.startText = '';
this.stopText = '';
this.displayModes = this.appService.getDisplayModes();
this.displayMode = this.displayModes[0];
this.stylingModes = this.appService.getStylingModes();
this.stylingMode = this.stylingModes[0].value;
this.types = this.appService.getTypes();
this.type = this.types[2].value;
this.hint = 'Start voice recognition';
this.disabled = false;
this.textAreaValue = '';
this.languages = this.appService.getLanguages();
this.language = this.languages[0];
this.langMap = this.appService.getLangMap();
this.interimResults = true;
this.continuous = false;
this.animation = true;
this.updateSpeechRecognitionConfig();
}
onStartClick() {
if (!window.SpeechRecognition && !window.webkitSpeechRecognition) {
notify({
message: 'The browser does not support Web Speech API (SpeechRecognition).',
type: 'error',
displayTime: 7000,
position: 'bottom center',
width: 'auto',
});
return;
}
this.state = 'listening';
this.hint = 'Stop voice recognition';
if (this.displayMode !== 'Custom') {
return;
}
this.type = 'danger';
}
onResult({ event }) {
const { results } = event;
const resultText = Object.values(results)
.map((resultItem) => resultItem[0].transcript.trim())
.join(' ');
this.textAreaValue = resultText;
}
onEnd() {
this.state = 'initial';
this.hint = 'Start voice recognition';
if (this.displayMode !== 'Custom') {
return;
}
this.type = 'default';
}
onClearButtonClick() {
this.textAreaValue = '';
}
onDisplayModeChanged({ value }) {
if (value === 'Text and Icon') {
this.startText = 'Dictate';
this.stopText = 'Stop';
return;
}
this.startText = '';
this.stopText = '';
if (value === 'Custom') {
this.stylingMode = 'contained';
this.type = this.state === 'initial' ? 'default' : 'danger';
}
}
updateSpeechRecognitionConfig() {
this.speechRecognitionConfig = {
lang: this.langMap[this.language],
interimResults: this.interimResults,
continuous: this.continuous,
};
}
}
bootstrapApplication(AppComponent, {
providers: [
provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }),
AppService,
],
});
::ng-deep .speech-to-text-demo {
display: flex;
gap: 20px;
height: 640px;
}
::ng-deep .speech-to-text-container {
display: flex;
flex-direction: column;
row-gap: 16px;
flex-grow: 1;
align-items: center;
justify-content: center;
}
::ng-deep #text-area {
margin-top: 16px;
}
::ng-deep .options {
display: flex;
flex-direction: column;
flex-shrink: 0;
width: 300px;
box-sizing: border-box;
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
gap: 16px;
}
::ng-deep .caption {
font-weight: 500;
font-size: 18px;
}
::ng-deep .option {
display: flex;
flex-direction: column;
row-gap: 4px;
}
::ng-deep .switch {
display: flex;
align-items: center;
column-gap: 8px;
}
::ng-deep .option-separator {
border-bottom: 1px solid var(--dx-color-border);
}
::ng-deep #speech-to-text.animation-disabled {
animation: none;
}
::ng-deep #speech-to-text.custom-button {
border-radius: 2rem;
}
import { Injectable } from '@angular/core';
import { type DxButtonTypes } from 'devextreme-angular/ui/button';
@Injectable({
providedIn: 'root',
})
export class AppService {
displayModes: string[] = [];
stylingModes: { displayValue: string; value: DxButtonTypes.ButtonStyle }[] = [];
types: { displayValue: string; value: DxButtonTypes.ButtonType }[] = [];
languages: string[] = [];
langMap: { [key: string]: string } = {};
constructor() {
this.displayModes = ['Icon Only', 'Text and Icon', 'Custom'];
this.stylingModes = [
{
displayValue: 'Contained',
value: 'contained',
},
{
displayValue: 'Outlined',
value: 'outlined',
},
{
displayValue: 'Text',
value: 'text',
},
];
this.types = [
{
displayValue: 'Normal',
value: 'normal',
},
{
displayValue: 'Success',
value: 'success',
},
{
displayValue: 'Default',
value: 'default',
},
{
displayValue: 'Danger',
value: 'danger',
},
];
this.languages = [
'Auto-detect',
'English',
'Spanish',
'French',
'German',
];
this.langMap = {
'Auto-detect': '',
'English': 'en-US',
'Spanish': 'es-ES',
'French': 'fr-FR',
'German': 'de-DE',
};
}
getDisplayModes() {
return this.displayModes;
}
getStylingModes() {
return this.stylingModes;
}
getTypes() {
return this.types;
}
getLanguages() {
return this.languages;
}
getLangMap() {
return this.langMap;
}
}
// 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/
const componentNames = [
'accordion',
'action-sheet',
'autocomplete',
'bar-gauge',
'box',
'bullet',
'button-group',
'button',
'calendar',
'card-view',
'chart',
'chat',
'check-box',
'circular-gauge',
'color-box',
'context-menu',
'data-grid',
'date-box',
'date-range-box',
'defer-rendering',
'diagram',
'draggable',
'drawer',
'drop-down-box',
'drop-down-button',
'file-manager',
'file-uploader',
'filter-builder',
'form',
'funnel',
'gallery',
'gantt',
'html-editor',
'linear-gauge',
'list',
'load-indicator',
'load-panel',
'lookup',
'map',
'menu',
'multi-view',
'nested',
'number-box',
'pagination',
'pie-chart',
'pivot-grid-field-chooser',
'pivot-grid',
'polar-chart',
'popover',
'popup',
'progress-bar',
'radio-group',
'range-selector',
'range-slider',
'recurrence-editor',
'resizable',
'responsive-box',
'sankey',
'scheduler',
'scroll-view',
'select-box',
'slider',
'sortable',
'sparkline',
'speech-to-text',
'speed-dial-action',
'splitter',
'stepper',
'switch',
'tab-panel',
'tabs',
'tag-box',
'text-area',
'text-box',
'tile-view',
'toast',
'toolbar',
'tooltip',
'tree-list',
'tree-map',
'tree-view',
'validation-group',
'validation-summary',
'validator',
'vector-map',
];
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
},
meta: {
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'@angular/platform-browser-dynamic': {
'esModule': true,
},
'@angular/platform-browser': {
'esModule': true,
},
'@angular/core': {
'esModule': true,
},
'@angular/common': {
'esModule': true,
},
'@angular/common/http': {
'esModule': true,
},
'@angular/animations': {
'esModule': true,
},
'@angular/forms': {
'esModule': true,
},
'openai': {
'esModule': true,
},
},
paths: {
'npm:': 'https://cdn.jsdelivr.net/npm/',
'bundles:': '../../../../bundles/',
'externals:': '../../../../bundles/externals/',
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
/* @angular */
'@angular/compiler': 'bundles:@angular/compiler.umd.js',
'@angular/platform-browser-dynamic': 'bundles:@angular/platform-browser-dynamic.umd.js',
'@angular/core': 'bundles:@angular/core.umd.js',
'@angular/core/primitives/signals': 'bundles:@angular/core.primitives.signals.umd.js',
'@angular/core/primitives/di': 'bundles:@angular/core.primitives.di.umd.js',
'@angular/common': 'bundles:@angular/common.umd.js',
'@angular/common/http': 'bundles:@angular/common-http.umd.js',
'@angular/platform-browser': 'bundles:@angular/platform-browser.umd.js',
'@angular/platform-browser/animations': 'bundles:@angular/platform-browser.umd.js',
'@angular/forms': 'bundles:@angular/forms.umd.js',
/* devextreme */
'devextreme': 'npm:devextreme@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
'devextreme-quill': 'npm:devextreme-quill@1.7.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.24',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.64',
/* devextreme-angular umd maps */
'devextreme-angular': 'bundles:devextreme-angular/devextreme-angular.umd.js',
'devextreme-angular/common/ai-integration': 'bundles:devextreme-angular/devextreme-angular-common-ai-integration.umd.js',
'devextreme-angular/core': 'bundles:devextreme-angular/devextreme-angular-core.umd.js',
'devextreme-angular/common/charts': 'bundles:devextreme-angular/devextreme-angular-common-charts.umd.js',
'devextreme-angular/common/core/animation': 'bundles:devextreme-angular/devextreme-angular-common-core-animation.umd.js',
'devextreme-angular/common/core/environment': 'bundles:devextreme-angular/devextreme-angular-common-core-environment.umd.js',
'devextreme-angular/common/core/events': 'bundles:devextreme-angular/devextreme-angular-common-core-events.umd.js',
'devextreme-angular/common/core/localization': 'bundles:devextreme-angular/devextreme-angular-common-core-localization.umd.js',
'devextreme-angular/common/core': 'bundles:devextreme-angular/devextreme-angular-common-core.umd.js',
'devextreme-angular/common/data/custom-store': 'bundles:devextreme-angular/devextreme-angular-common-data-custom-store.umd.js',
'devextreme-angular/common/data': 'bundles:devextreme-angular/devextreme-angular-common-data.umd.js',
'devextreme-angular/common/export/excel': 'bundles:devextreme-angular/devextreme-angular-common-export-excel.umd.js',
'devextreme-angular/common/export/pdf': 'bundles:devextreme-angular/devextreme-angular-common-export-pdf.umd.js',
'devextreme-angular/common/export': 'bundles:devextreme-angular/devextreme-angular-common-export.umd.js',
'devextreme-angular/common/grids': 'bundles:devextreme-angular/devextreme-angular-common-grids.umd.js',
'devextreme-angular/common': 'bundles:devextreme-angular/devextreme-angular-common.umd.js',
'devextreme-angular/http': 'bundles:devextreme-angular/devextreme-angular-http.umd.js',
'devextreme-angular/core/tokens': 'bundles:devextreme-angular/devextreme-angular-core-tokens.umd.js',
...componentNames.reduce((acc, name) => {
acc[`devextreme-angular/ui/${name}`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}.umd.js`;
acc[`devextreme-angular/ui/${name}/nested`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}-nested.umd.js`;
return acc;
}, {}),
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js',
'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign',
'inferno': 'npm:inferno@8.2.3/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@8.2.3/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
'@preact/signals-core': 'npm:@preact/signals-core@1.8.0/dist/signals-core.min.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
'zone.js': 'npm:zone.js@0.15.1/bundles/zone.umd.js',
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts',
},
'devextreme': {
defaultExtension: 'js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/common/core/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
'rxjs': {
defaultExtension: 'js',
},
'rxjs/operators': {
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:rxjs@7.5.3/package.json',
'npm:rxjs@7.5.3/operators/package.json',
'npm:devexpress-diagram@2.2.24/package.json',
'npm:devexpress-gantt@4.1.64/package.json',
],
};
window.process = {
env: {
NODE_ENV: 'production',
},
};
System.config(window.config);
// eslint-disable-next-line no-console
// System.import('@angular/compiler').catch(console.error.bind(console));
// eslint-disable-next-line
const useTgzInCSB = ['openai'];
let packagesInfo = {
"@angular/core": {
"version": "21.0.5"
},
"core-js": {
"version": "2.6.12"
},
"typescript": {
"version": "5.9.3"
},
"zone.js": {
"version": "0.15.1"
}
};
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<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=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.2.3/css/dx.light.css" />
<script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/zone.js@0.15.1/bundles/zone.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/reflect-metadata@0.1.13/Reflect.js"></script>
<script src="https://cdn.jsdelivr.net/npm/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>
You can integrate SpeechToText with any text input, including other DevExtreme components. To introduce this capability, set a component's value property to transcribed text. SpeechToText returns transcribed text in the onResult handler as users speak. When speech stops, the component calls the onEnd handler and switches from a "listening" state to the initial state. SpeechToText implements different icon (startIcon/stopIcon), text (startText/stopText), and click handler (onStartClick/onStopClick) properties in each component state.
For a complete overview of SpeechToText options (including Web Speech API options), refer to the following topic: SpeechToText API Reference.