Backend API
        
    import React, { useCallback, useRef } from 'react';
import Scheduler, { Resource, type SchedulerTypes, SchedulerRef } from 'devextreme-react/scheduler';
import SpeedDialAction from 'devextreme-react/speed-dial-action';
import { data, priorities } from './data.ts';
const views: SchedulerTypes.ViewType[] = ['week', 'month'];
const cellDuration = 30;
const currentDate = new Date(2021, 2, 25);
const App = () => {
  const schedulerRef = useRef<SchedulerRef>(null);
  const showAppointmentPopup = useCallback(() => {
    schedulerRef.current?.instance().showAppointmentPopup();
  }, []);
  return (
    <React.Fragment>
      <Scheduler
        ref={schedulerRef}
        timeZone="America/Los_Angeles"
        dataSource={data}
        views={views}
        adaptivityEnabled={true}
        defaultCurrentView="month"
        defaultCurrentDate={currentDate}
        cellDuration={cellDuration}
        height={590}
        startDayHour={9}
      >
        <Resource
          dataSource={priorities}
          fieldExpr="priorityId"
          label="Priority"
        />
      </Scheduler>
      <SpeedDialAction
        icon="plus"
        onClick={showAppointmentPopup}
      />
    </React.Fragment>
  );
};
export default App;
    
    import React, { useCallback, useRef } from 'react';
import Scheduler, { Resource } from 'devextreme-react/scheduler';
import SpeedDialAction from 'devextreme-react/speed-dial-action';
import { data, priorities } from './data.js';
const views = ['week', 'month'];
const cellDuration = 30;
const currentDate = new Date(2021, 2, 25);
const App = () => {
  const schedulerRef = useRef(null);
  const showAppointmentPopup = useCallback(() => {
    schedulerRef.current?.instance().showAppointmentPopup();
  }, []);
  return (
    <React.Fragment>
      <Scheduler
        ref={schedulerRef}
        timeZone="America/Los_Angeles"
        dataSource={data}
        views={views}
        adaptivityEnabled={true}
        defaultCurrentView="month"
        defaultCurrentDate={currentDate}
        cellDuration={cellDuration}
        height={590}
        startDayHour={9}
      >
        <Resource
          dataSource={priorities}
          fieldExpr="priorityId"
          label="Priority"
        />
      </Scheduler>
      <SpeedDialAction
        icon="plus"
        onClick={showAppointmentPopup}
      />
    </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 Appointment = SchedulerTypes.Appointment & { priorityId? : Array<number>; };
type Resource = {
  text: string;
  id: number;
  color: string;
};
export const data: Appointment[] = [
  {
    text: 'Website Re-Design Plan',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=MO,FR;WKST=TU;INTERVAL=2;COUNT=32',
  }, {
    text: 'Book Flights to San Fran for Sales Trip',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=MO,FR;INTERVAL=4;COUNT=32',
    allDay: true,
    priorityId: [1],
  }, {
    text: 'Install New Router in Dev Room',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=FR;INTERVAL=2;COUNT=32',
  }, {
    text: 'Approve Personal Computer Upgrade Plan',
    startDate: new Date('2021-02-10T17:00:00.000Z'),
    endDate: new Date('2021-02-10T18:00:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=WE;INTERVAL=2;COUNT=32',
    priorityId: [2],
  }, {
    text: 'Final Budget Review',
    startDate: new Date('2021-04-01T19:00:00.000Z'),
    endDate: new Date('2021-04-01T20:35:00.000Z'),
  }, {
    text: 'New Brochures',
    startDate: new Date('2021-04-01T21:30:00.000Z'),
    endDate: new Date('2021-04-01T22:45:00.000Z'),
  }, {
    text: 'Install New Database',
    startDate: new Date('2021-04-01T16:45:00.000Z'),
    endDate: new Date('2021-04-01T18:15:00.000Z'),
  }, {
    text: 'Approve New Online Marketing Strategy',
    startDate: new Date('2021-04-01T19:00:00.000Z'),
    endDate: new Date('2021-04-01T21:00:00.000Z'),
  }, {
    text: 'Upgrade Personal Computers',
    startDate: new Date('2021-04-01T22:15:00.000Z'),
    endDate: new Date('2021-04-01T23:30:00.000Z'),
  }, {
    text: 'Upgrade Personal Computers',
    startDate: new Date('2021-04-02T22:15:00.000Z'),
    endDate: new Date('2021-04-02T23:30:00.000Z'),
  },
];
export const priorities: Resource[] = [
  {
    text: 'High priority',
    id: 1,
    color: '#cc5c53',
  }, {
    text: 'Low priority',
    id: 2,
    color: '#ff9747',
  },
];
    
    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 data = [
  {
    text: 'Website Re-Design Plan',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=MO,FR;WKST=TU;INTERVAL=2;COUNT=32',
  },
  {
    text: 'Book Flights to San Fran for Sales Trip',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=MO,FR;INTERVAL=4;COUNT=32',
    allDay: true,
    priorityId: [1],
  },
  {
    text: 'Install New Router in Dev Room',
    startDate: new Date('2021-03-01T16:30:00.000Z'),
    endDate: new Date('2021-03-01T18:30:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=FR;INTERVAL=2;COUNT=32',
  },
  {
    text: 'Approve Personal Computer Upgrade Plan',
    startDate: new Date('2021-02-10T17:00:00.000Z'),
    endDate: new Date('2021-02-10T18:00:00.000Z'),
    recurrenceRule: 'FREQ=WEEKLY;BYDAY=WE;INTERVAL=2;COUNT=32',
    priorityId: [2],
  },
  {
    text: 'Final Budget Review',
    startDate: new Date('2021-04-01T19:00:00.000Z'),
    endDate: new Date('2021-04-01T20:35:00.000Z'),
  },
  {
    text: 'New Brochures',
    startDate: new Date('2021-04-01T21:30:00.000Z'),
    endDate: new Date('2021-04-01T22:45:00.000Z'),
  },
  {
    text: 'Install New Database',
    startDate: new Date('2021-04-01T16:45:00.000Z'),
    endDate: new Date('2021-04-01T18:15:00.000Z'),
  },
  {
    text: 'Approve New Online Marketing Strategy',
    startDate: new Date('2021-04-01T19:00:00.000Z'),
    endDate: new Date('2021-04-01T21:00:00.000Z'),
  },
  {
    text: 'Upgrade Personal Computers',
    startDate: new Date('2021-04-01T22:15:00.000Z'),
    endDate: new Date('2021-04-01T23:30:00.000Z'),
  },
  {
    text: 'Upgrade Personal Computers',
    startDate: new Date('2021-04-02T22:15:00.000Z'),
    endDate: new Date('2021-04-02T23:30:00.000Z'),
  },
];
export const priorities = [
  {
    text: 'High priority',
    id: 1,
    color: '#cc5c53',
  },
  {
    text: 'Low priority',
    id: 2,
    color: '#ff9747',
  },
];
    
    <!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>
    
    @media only screen and (max-width: 370px) {
  .dx-popup:not(.dx-scheduler-appointment-popup) .dx-dialog .dx-popup-bottom.dx-toolbar .dx-toolbar-items-container {
    height: auto;
  }
  .dx-popup:not(.dx-scheduler-appointment-popup) .dx-dialog .dx-toolbar-items-container .dx-toolbar-center {
    display: flex;
    flex-direction: column;
  }
  .dx-popup:not(.dx-scheduler-appointment-popup) .dx-dialog .dx-toolbar-items-container .dx-toolbar-center .dx-toolbar-button {
    padding: 0;
  }
  .dx-popup:not(.dx-scheduler-appointment-popup) .dx-dialog .dx-toolbar-items-container .dx-toolbar-center .dx-toolbar-button .dx-button {
    width: 200px;
  }
  .dx-popup:not(.dx-scheduler-appointment-popup) .dx-dialog .dx-toolbar-items-container .dx-toolbar-center .dx-toolbar-button:nth-child(1) {
    margin-bottom: 12px;
  }
}
    
                In this demo, we also added the floating action button as an alternative way to create a new appointment. The button is implemented with the SpeedDialAction component.