Backend API
        
    import React, { useCallback, useState } from 'react';
import {
  CircularGauge, Scale, Label, RangeContainer, Range, Tooltip, Title, Font,
} from 'devextreme-react/circular-gauge';
import { SelectBox } from 'devextreme-react/select-box';
import { dataSource, seasonLabel } from './data.ts';
function customizeText({ valueText }) {
  return `${valueText} °C`;
}
function App() {
  const [value, setValue] = useState(dataSource[0].mean);
  const [subvalues, setSubvalues] = useState([dataSource[0].min, dataSource[0].max]);
  const onSelectionChanged = useCallback(({ selectedItem }) => {
    setValue(selectedItem.mean);
    setSubvalues([selectedItem.min, selectedItem.max]);
  }, [setValue, setSubvalues]);
  return (
    <div id="gauge-demo">
      <CircularGauge
        id="gauge"
        value={value}
        subvalues={subvalues}
      >
        <Scale startValue={10} endValue={40} tickInterval={5}>
          <Label customizeText={customizeText} />
        </Scale>
        <RangeContainer>
          <Range startValue={10} endValue={20} color="#0077BE" />
          <Range startValue={20} endValue={30} color="#E6E200" />
          <Range startValue={30} endValue={40} color="#77DD77" />
        </RangeContainer>
        <Tooltip enabled={true} />
        <Title text="Temperature in the Greenhouse">
          <Font size={28} />
        </Title>
      </CircularGauge>
      <SelectBox
        id="seasons"
        width={150}
        inputAttr={seasonLabel}
        dataSource={dataSource}
        defaultValue={dataSource[0]}
        displayExpr="name"
        onSelectionChanged={onSelectionChanged}
      />
    </div>
  );
}
export default App;
    
    import React, { useCallback, useState } from 'react';
import {
  CircularGauge,
  Scale,
  Label,
  RangeContainer,
  Range,
  Tooltip,
  Title,
  Font,
} from 'devextreme-react/circular-gauge';
import { SelectBox } from 'devextreme-react/select-box';
import { dataSource, seasonLabel } from './data.js';
function customizeText({ valueText }) {
  return `${valueText} °C`;
}
function App() {
  const [value, setValue] = useState(dataSource[0].mean);
  const [subvalues, setSubvalues] = useState([dataSource[0].min, dataSource[0].max]);
  const onSelectionChanged = useCallback(
    ({ selectedItem }) => {
      setValue(selectedItem.mean);
      setSubvalues([selectedItem.min, selectedItem.max]);
    },
    [setValue, setSubvalues],
  );
  return (
    <div id="gauge-demo">
      <CircularGauge
        id="gauge"
        value={value}
        subvalues={subvalues}
      >
        <Scale
          startValue={10}
          endValue={40}
          tickInterval={5}
        >
          <Label customizeText={customizeText} />
        </Scale>
        <RangeContainer>
          <Range
            startValue={10}
            endValue={20}
            color="#0077BE"
          />
          <Range
            startValue={20}
            endValue={30}
            color="#E6E200"
          />
          <Range
            startValue={30}
            endValue={40}
            color="#77DD77"
          />
        </RangeContainer>
        <Tooltip enabled={true} />
        <Title text="Temperature in the Greenhouse">
          <Font size={28} />
        </Title>
      </CircularGauge>
      <SelectBox
        id="seasons"
        width={150}
        inputAttr={seasonLabel}
        dataSource={dataSource}
        defaultValue={dataSource[0]}
        displayExpr="name"
        onSelectionChanged={onSelectionChanged}
      />
    </div>
  );
}
export default App;
    
    import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
  <App />,
  document.getElementById('app'),
);
    
    export const dataSource = [{
  name: 'Summer',
  mean: 35,
  min: 28,
  max: 38,
}, {
  name: 'Autumn',
  mean: 24,
  min: 20,
  max: 32,
}, {
  name: 'Winter',
  mean: 18,
  min: 16,
  max: 23,
}, {
  name: 'Spring',
  mean: 27,
  min: 18,
  max: 31,
}];
export const seasonLabel = { 'aria-label': 'Season' };
    
    window.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://cdn.jsdelivr.net/npm/',
    '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@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
    'devextreme-react': 'npm:devextreme-react@link:../../packages/devextreme-react/npm/cjs',
    'devextreme-quill': 'npm:devextreme-quill@1.7.6/dist/dx-quill.min.js',
    'devexpress-diagram': 'npm:devexpress-diagram@2.2.24/dist/dx-diagram.js',
    'devexpress-gantt': 'npm:devexpress-gantt@4.1.64/dist/dx-gantt.js',
    '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',
    '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-react/common': {
      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',
  ],
  babelOptions: {
    sourceMaps: false,
    stage0: true,
    react: true,
  },
};
System.config(window.config);
// eslint-disable-next-line
const useTgzInCSB = ['openai'];
    
    import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
    
    export const dataSource = [
  {
    name: 'Summer',
    mean: 35,
    min: 28,
    max: 38,
  },
  {
    name: 'Autumn',
    mean: 24,
    min: 20,
    max: 32,
  },
  {
    name: 'Winter',
    mean: 18,
    min: 16,
    max: 23,
  },
  {
    name: 'Spring',
    mean: 27,
    min: 18,
    max: 31,
  },
];
export const seasonLabel = { 'aria-label': 'Season' };
    
    <!DOCTYPE html>
<html 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="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/25.1.6/css/dx.light.css" />
    <link rel="stylesheet" type="text/css" href="styles.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/systemjs@0.21.3/dist/system.js"></script>
    <script type="text/javascript" src="config.js"></script>
    <script type="text/javascript">
      System.import("./index.tsx");
    </script>
  </head>
  <body class="dx-viewport">
    <div class="demo-container">
      <div id="app"></div>
    </div>
  </body>
</html>
    
    #gauge-demo {
  height: 440px;
  width: 100%;
}
#gauge {
  width: 80%;
  height: 100%;
  float: left;
}
#seasons {
  width: 20%;
  float: left;
  text-align: left;
  margin-top: 20px;
}