Backend API
        
    import React, { useState } from 'react';
import Scheduler, { type SchedulerTypes } from 'devextreme-react/scheduler';
import RadioGroup from 'devextreme-react/radio-group';
import { data, shifts } from './data.ts';
const currentDate = new Date(2021, 2, 30);
const views: SchedulerTypes.ViewType[] = ['day', 'workWeek'];
const App = () => {
  const [currentShift, setCurrentShift] = useState(shifts[0]);
  return <React.Fragment>
    <div className="options">
      <div className="option">
        <div className="label">Work Hours:</div>
        <div className="value">
          <RadioGroup
            defaultValue={shifts[0]}
            items={shifts}
            layout= 'horizontal'
            onValueChange={setCurrentShift}
          />
        </div>
      </div>
    </div>
    <br />
    <Scheduler
      timeZone= 'America/Los_Angeles'
      dataSource={data}
      views={views}
      defaultCurrentView='workWeek'
      currentDate={currentDate}
      startDayHour= {0}
      endDayHour= {8}
      offset={currentShift.offset}
      cellDuration={60}
      showAllDayPanel={false}
    />
  </React.Fragment>;
};
export default App;
    
    import React, { useState } from 'react';
import Scheduler from 'devextreme-react/scheduler';
import RadioGroup from 'devextreme-react/radio-group';
import { data, shifts } from './data.js';
const currentDate = new Date(2021, 2, 30);
const views = ['day', 'workWeek'];
const App = () => {
  const [currentShift, setCurrentShift] = useState(shifts[0]);
  return (
    <React.Fragment>
      <div className="options">
        <div className="option">
          <div className="label">Work Hours:</div>
          <div className="value">
            <RadioGroup
              defaultValue={shifts[0]}
              items={shifts}
              layout="horizontal"
              onValueChange={setCurrentShift}
            />
          </div>
        </div>
      </div>
      <br />
      <Scheduler
        timeZone="America/Los_Angeles"
        dataSource={data}
        views={views}
        defaultCurrentView="workWeek"
        currentDate={currentDate}
        startDayHour={0}
        endDayHour={8}
        offset={currentShift.offset}
        cellDuration={60}
        showAllDayPanel={false}
      />
    </React.Fragment>
  );
};
export default App;
    
    import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
  <App />,
  document.getElementById('app'),
);
    
    import { SchedulerTypes } from 'devextreme-react/scheduler';
type Shift = {
  text: string;
  offset: number;
};
export const shifts: Shift[] = [{
  text: 'First shift',
  offset: -120,
}, {
  text: 'Second shift',
  offset: 360,
}, {
  text: 'Third shift',
  offset: 840,
}];
export const data: SchedulerTypes.Appointment[] = [{
  text: 'Website Re-Design Plan',
  startDate: '2021-03-29T16:00:00.000Z',
  endDate: '2021-03-29T18:00:00.000Z',
}, {
  text: 'Approve Personal Computer Upgrade Plan',
  startDate: '2021-03-31T01:30:00.000Z',
  endDate: '2021-03-31T03:00:00.000Z',
}, {
  text: 'Final Budget Review',
  startDate: '2021-03-30T16:30:00.000Z',
  endDate: '2021-03-30T18:05:00.000Z',
}, {
  text: 'New Brochures',
  startDate: '2021-04-01T23:30:00.000Z',
  endDate: '2021-04-02T02:30:00.000Z',
}, {
  text: 'Approve New Online Marketing Strategy',
  startDate: '2021-03-31T16:30:00.000Z',
  endDate: '2021-03-31T18:30:00.000Z',
}, {
  text: 'Prepare 2021 Marketing Plan',
  startDate: '2021-04-01T16:30:00.000Z',
  endDate: '2021-04-01T18:00:00.000Z',
}, {
  text: 'Brochure Design Review',
  startDate: '2021-04-02T17:30:00.000Z',
  endDate: '2021-04-02T19:00:00.000Z',
}, {
  text: 'Create Icons for Website',
  startDate: '2021-04-01T18:00:00.000Z',
  endDate: '2021-04-01T19:30:00.000Z',
}, {
  text: 'Submit New Website Design',
  startDate: '2021-04-02T09:30:00.000Z',
  endDate: '2021-04-02T11:00:00.000Z',
}, {
  text: 'Launch New Website',
  startDate: '2021-04-01T01:30:00.000Z',
  endDate: '2021-04-01T03:00:00.000Z',
  recurrenceRule: 'FREQ=WEEKLY;BYDAY=WE;INTERVAL=2',
}, {
  text: 'Install New Router in Dev Room',
  startDate: '2021-03-29T08:00:00.000Z',
  endDate: '2021-03-29T09:00:00.000Z',
}, {
  text: 'Upgrade Personal Computers',
  startDate: '2021-03-30T01:00:00.000Z',
  endDate: '2021-03-30T03:00:00.000Z',
}, {
  text: 'Install New Database',
  startDate: '2021-03-31T08:30:00.000Z',
  endDate: '2021-03-31T10:00:00.000Z',
}, {
  text: 'Update Customer Shipping Profiles',
  startDate: '2021-04-01T09:30:00.000Z',
  endDate: '2021-04-01T11:00:00.000Z',
  recurrenceRule: 'FREQ=WEEKLY;BYDAY=TH',
}, {
  text: 'Upgrade Server Hardware',
  startDate: '2021-03-30T08:30:00.000Z',
  endDate: '2021-03-30T11:00:00.000Z',
  recurrenceRule: 'FREQ=MONTHLY;BYMONTHDAY=30',
}];
    
    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 shifts = [
  {
    text: 'First shift',
    offset: -120,
  },
  {
    text: 'Second shift',
    offset: 360,
  },
  {
    text: 'Third shift',
    offset: 840,
  },
];
export const data = [
  {
    text: 'Website Re-Design Plan',
    startDate: '2021-03-29T16:00:00.000Z',
    endDate: '2021-03-29T18:00:00.000Z',
  },
  {
    text: 'Approve Personal Computer Upgrade Plan',
    startDate: '2021-03-31T01:30:00.000Z',
    endDate: '2021-03-31T03:00:00.000Z',
  },
  {
    text: 'Final Budget Review',
    startDate: '2021-03-30T16:30:00.000Z',
    endDate: '2021-03-30T18:05:00.000Z',
  },
  {
    text: 'New Brochures',
    startDate: '2021-04-01T23:30:00.000Z',
    endDate: '2021-04-02T02:30:00.000Z',
  },
  {
    text: 'Approve New Online Marketing Strategy',
    startDate: '2021-03-31T16:30:00.000Z',
    endDate: '2021-03-31T18:30:00.000Z',
  },
  {
    text: 'Prepare 2021 Marketing Plan',
    startDate: '2021-04-01T16:30:00.000Z',
    endDate: '2021-04-01T18:00:00.000Z',
  },
  {
    text: 'Brochure Design Review',
    startDate: '2021-04-02T17:30:00.000Z',
    endDate: '2021-04-02T19:00:00.000Z',
  },
  {
    text: 'Create Icons for Website',
    startDate: '2021-04-01T18:00:00.000Z',
    endDate: '2021-04-01T19:30:00.000Z',
  },
  {
    text: 'Submit New Website Design',
    startDate: '2021-04-02T09:30:00.000Z',
    endDate: '2021-04-02T11:00:00.000Z',
  },
  {
    text: 'Launch New Website',
    startDate: '2021-04-01T01:30:00.000Z',
    endDate: '2021-04-01T03:00:00.000Z',
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=WE;INTERVAL=2',
  },
  {
    text: 'Install New Router in Dev Room',
    startDate: '2021-03-29T08:00:00.000Z',
    endDate: '2021-03-29T09:00:00.000Z',
  },
  {
    text: 'Upgrade Personal Computers',
    startDate: '2021-03-30T01:00:00.000Z',
    endDate: '2021-03-30T03:00:00.000Z',
  },
  {
    text: 'Install New Database',
    startDate: '2021-03-31T08:30:00.000Z',
    endDate: '2021-03-31T10:00:00.000Z',
  },
  {
    text: 'Update Customer Shipping Profiles',
    startDate: '2021-04-01T09:30:00.000Z',
    endDate: '2021-04-01T11:00:00.000Z',
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=TH',
  },
  {
    text: 'Upgrade Server Hardware',
    startDate: '2021-03-30T08:30:00.000Z',
    endDate: '2021-03-30T11:00:00.000Z',
    recurrenceRule: 'FREQ=MONTHLY;BYMONTHDAY=30',
  },
];
    
    <!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="stylesheet" type="text/css" 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>
    
    .options {
  background-color: rgba(191, 191, 191, 0.15);
  margin-top: 20px;
  display: flex;
  align-items: flex-start;
  height: 100%;
}
.option {
  padding: 16px;
  display: flex;
  align-items: center;
}
.label,
.value {
  display: inline-block;
  vertical-align: middle;
}
.label {
  width: 100px;
}