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Backend API
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import React from 'react';import PieChart, { Legend, Series, Export, Label, SmallValuesGrouping, Connector,} from 'devextreme-react/pie-chart';import { internetLanguages } from './data.ts';function customizeLabel(point: { argumentText: string; valueText: string; }) { return `${point.argumentText}: ${point.valueText}%`;}function App() { return ( <PieChart id="pie" type="doughnut" title="Top Internet Languages" palette="Soft Pastel" dataSource={internetLanguages} > <Series argumentField="language" valueField="percent"> <SmallValuesGrouping mode="topN" topCount={3} /> <Label visible={true} format="fixedPoint" customizeText={customizeLabel} > <Connector visible={true} width={1} /> </Label> </Series> <Export enabled={true} /> <Legend horizontalAlignment="center" verticalAlignment="bottom" /> </PieChart> );}export default App;xxxxxxxxxximport React from 'react';import PieChart, { Legend, Series, Export, Label, SmallValuesGrouping, Connector,} from 'devextreme-react/pie-chart';import { internetLanguages } from './data.js';function customizeLabel(point) { return `${point.argumentText}: ${point.valueText}%`;}function App() { return ( <PieChart id="pie" type="doughnut" title="Top Internet Languages" palette="Soft Pastel" dataSource={internetLanguages} > <Series argumentField="language" valueField="percent" > <SmallValuesGrouping mode="topN" topCount={3} /> <Label visible={true} format="fixedPoint" customizeText={customizeLabel} > <Connector visible={true} width={1} /> </Label> </Series> <Export enabled={true} /> <Legend horizontalAlignment="center" verticalAlignment="bottom" /> </PieChart> );}export default App;xxxxxxxxxximport React from 'react';import ReactDOM from 'react-dom';import App from './App.tsx';ReactDOM.render( <App />, document.getElementById('app'),);xxxxxxxxxxexport const internetLanguages = [{ language: 'English', percent: 55.5,}, { language: 'Chinese', percent: 4.0,}, { language: 'Spanish', percent: 4.3,}, { language: 'Japanese', percent: 4.9,}, { language: 'Portuguese', percent: 2.3,}, { language: 'German', percent: 5.6,}, { language: 'French', percent: 3.8,}, { language: 'Russian', percent: 6.3,}, { language: 'Italian', percent: 1.6,}, { language: 'Polish', percent: 1.8,}];xxxxxxxxxxwindow.exports = window.exports || {};window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, jsx: 'react', }, meta: { 'react': { 'esModule': true, }, 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, 'openai': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', 'bundles:': 'bundles/', 'externals:': 'bundles/externals/', }, defaultExtension: 'js', 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', 'react': 'npm:react@17.0.2/umd/react.development.js', 'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.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', 'devextreme': 'npm:devextreme@24.2.6/cjs', 'devextreme-react': 'npm:devextreme-react@24.2.6/cjs', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.15/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.60/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/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', 'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/common/core/events/utils': { main: 'index', }, 'devextreme/localization/messages': { format: 'json', defaultExtension: 'json', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, },};System.config(window.config);xxxxxxxxxximport React from 'react';import ReactDOM from 'react-dom';import App from './App.js';ReactDOM.render(<App />, document.getElementById('app'));xxxxxxxxxxexport const internetLanguages = [ { language: 'English', percent: 55.5, }, { language: 'Chinese', percent: 4.0, }, { language: 'Spanish', percent: 4.3, }, { language: 'Japanese', percent: 4.9, }, { language: 'Portuguese', percent: 2.3, }, { language: 'German', percent: 5.6, }, { language: 'French', percent: 3.8, }, { language: 'Russian', percent: 6.3, }, { language: 'Italian', percent: 1.6, }, { language: 'Polish', percent: 1.8, },];xxxxxxxxxx<html lang="en"> <head></head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body></html>xxxxxxxxxx#pie { height: 440px;}