Backend API
import React, { useCallback, useMemo, useRef, useState } from 'react';
import { Scheduler, Resource, Toolbar, Item, type SchedulerRef, type SchedulerTypes } from 'devextreme-react/scheduler';
import { SelectBox, type SelectBoxTypes } from 'devextreme-react/select-box';
import { type DataSource } from 'devextreme-react/common/data';
import { assignees, schedulerDataSource, currentDate } from './data.ts';
const views: SchedulerTypes.ViewType[] = ['day', 'week', 'workWeek', 'month'];
const selectBoxPlaceholder = 'Select Employee';
const inputAttr = { 'aria-label': selectBoxPlaceholder };
const MS_IN_HOUR = 60 * 1000;
const App = () => {
const schedulerRef = useRef<SchedulerRef>(null);
const [assigneesFilterValue, setAssigneesFilterValue] = useState<number>();
const onAssigneesFilterChange = useCallback((event: SelectBoxTypes.ValueChangedEvent) => {
const scheduler = schedulerRef.current?.instance?.();
if (!scheduler) {
return;
}
const dataSource = scheduler.option('dataSource') as DataSource;
const filter = event.value ? ['assigneeId', 'contains', event.value] : null;
dataSource.filter(filter);
scheduler.option('dataSource', dataSource);
setAssigneesFilterValue(event.value);
}, []);
const onAppointmentAdd = useCallback(() => {
const scheduler = schedulerRef.current?.instance?.();
if (!scheduler) {
return;
}
const selected = scheduler.option('selectedCellData') ?? [];
if (selected.length) {
const firstSelected = selected[0];
const lastSelected = selected.at(-1);
scheduler.showAppointmentPopup({
...firstSelected.groups,
allDay: firstSelected.allDay,
startDate: new Date(firstSelected.startDateUTC),
endDate: new Date(lastSelected.endDateUTC),
}, true);
return;
}
const currentDate = scheduler.option('currentDate');
const cellDuration = scheduler.option('cellDuration') as number;
const cellDurationMs = cellDuration * MS_IN_HOUR;
const currentTime = new Date(currentDate as Date).getTime();
const roundTime = Math.round(currentTime / cellDurationMs) * cellDurationMs;
scheduler.showAppointmentPopup({
startDate: new Date(roundTime),
endDate: new Date(roundTime + cellDurationMs),
}, true);
}, []);
const toggleButtonOptions = useMemo(() => ({
icon: 'plus',
text: 'New Appointment',
stylingMode: 'outlined',
type: 'normal',
onClick() { onAppointmentAdd(); },
}), [onAppointmentAdd]);
return (
<Scheduler
timeZone="America/Los_Angeles"
dataSource={schedulerDataSource}
views={views}
defaultCurrentView="workWeek"
defaultCurrentDate={currentDate}
startDayHour={9}
endDayHour={19}
height={600}
ref={schedulerRef}
>
<Resource
dataSource={assignees}
allowMultiple={true}
fieldExpr="assigneeId"
label="Assignee"
/>
<Toolbar>
<Item name="today" />
<Item name="dateNavigator" />
<Item
location="before"
locateInMenu="auto"
widget="dxButton"
options={toggleButtonOptions} />
<Item location="before" locateInMenu="auto">
<SelectBox
placeholder={selectBoxPlaceholder}
items={assignees}
showClearButton={true}
displayExpr="text"
valueExpr="id"
inputAttr={inputAttr}
width={200}
value={assigneesFilterValue}
onValueChanged={onAssigneesFilterChange} />
</Item>
<Item location="after" locateInMenu="auto" name="viewSwitcher" />
</Toolbar>
</Scheduler>
);
};
export default App;
import React, {
useCallback, useMemo, useRef, useState,
} from 'react';
import {
Scheduler, Resource, Toolbar, Item,
} from 'devextreme-react/scheduler';
import { SelectBox } from 'devextreme-react/select-box';
import { assignees, schedulerDataSource, currentDate } from './data.js';
const views = ['day', 'week', 'workWeek', 'month'];
const selectBoxPlaceholder = 'Select Employee';
const inputAttr = { 'aria-label': selectBoxPlaceholder };
const MS_IN_HOUR = 60 * 1000;
const App = () => {
const schedulerRef = useRef(null);
const [assigneesFilterValue, setAssigneesFilterValue] = useState();
const onAssigneesFilterChange = useCallback((event) => {
const scheduler = schedulerRef.current?.instance?.();
if (!scheduler) {
return;
}
const dataSource = scheduler.option('dataSource');
const filter = event.value ? ['assigneeId', 'contains', event.value] : null;
dataSource.filter(filter);
scheduler.option('dataSource', dataSource);
setAssigneesFilterValue(event.value);
}, []);
const onAppointmentAdd = useCallback(() => {
const scheduler = schedulerRef.current?.instance?.();
if (!scheduler) {
return;
}
const selected = scheduler.option('selectedCellData') ?? [];
if (selected.length) {
const firstSelected = selected[0];
const lastSelected = selected.at(-1);
scheduler.showAppointmentPopup(
{
...firstSelected.groups,
allDay: firstSelected.allDay,
startDate: new Date(firstSelected.startDateUTC),
endDate: new Date(lastSelected.endDateUTC),
},
true,
);
return;
}
const currentDate = scheduler.option('currentDate');
const cellDuration = scheduler.option('cellDuration');
const cellDurationMs = cellDuration * MS_IN_HOUR;
const currentTime = new Date(currentDate).getTime();
const roundTime = Math.round(currentTime / cellDurationMs) * cellDurationMs;
scheduler.showAppointmentPopup(
{
startDate: new Date(roundTime),
endDate: new Date(roundTime + cellDurationMs),
},
true,
);
}, []);
const toggleButtonOptions = useMemo(
() => ({
icon: 'plus',
text: 'New Appointment',
stylingMode: 'outlined',
type: 'normal',
onClick() {
onAppointmentAdd();
},
}),
[onAppointmentAdd],
);
return (
<Scheduler
timeZone="America/Los_Angeles"
dataSource={schedulerDataSource}
views={views}
defaultCurrentView="workWeek"
defaultCurrentDate={currentDate}
startDayHour={9}
endDayHour={19}
height={600}
ref={schedulerRef}
>
<Resource
dataSource={assignees}
allowMultiple={true}
fieldExpr="assigneeId"
label="Assignee"
/>
<Toolbar>
<Item name="today" />
<Item name="dateNavigator" />
<Item
location="before"
locateInMenu="auto"
widget="dxButton"
options={toggleButtonOptions}
/>
<Item
location="before"
locateInMenu="auto"
>
<SelectBox
placeholder={selectBoxPlaceholder}
items={assignees}
showClearButton={true}
displayExpr="text"
valueExpr="id"
inputAttr={inputAttr}
width={200}
value={assigneesFilterValue}
onValueChanged={onAssigneesFilterChange}
/>
</Item>
<Item
location="after"
locateInMenu="auto"
name="viewSwitcher"
/>
</Toolbar>
</Scheduler>
);
};
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
import { type SchedulerTypes } from 'devextreme-react/scheduler';
import { DataSource } from 'devextreme-react/common/data';
type Appointment = SchedulerTypes.Appointment & {
assigneeId: number[];
};
export interface Assignee {
text: string;
id: number;
}
const addDays = (date, days) => new Date(new Date(date).setUTCDate(date.getUTCDate() + days));
const now = new Date(new Date().setUTCHours(0, 0, 0, 0));
const startOfTheWeek = addDays(now, -now.getUTCDay());
export const currentDate = new Date(2025, 5, 10);
const currentStartOfTheWeek = addDays(currentDate, -currentDate.getUTCDay());
const data: Appointment[] = [
{
text: 'Website Re-Design Plan',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 1).setUTCHours(16, 30)),
endDate: new Date(addDays(startOfTheWeek, 1).setUTCHours(18, 30)),
}, {
text: 'Book Flights to San Fran for Sales Trip',
assigneeId: [2],
startDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(19)),
endDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(20)),
allDay: true,
}, {
text: 'Install New Router in Dev Room',
assigneeId: [1],
startDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(21, 30)),
endDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(22, 30)),
}, {
text: 'Approve Personal Computer Upgrade Plan',
assigneeId: [3],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(17)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(18)),
}, {
text: 'Final Budget Review',
assigneeId: [1],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(19)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(20, 35)),
}, {
text: 'New Brochures',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(21, 30)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(22, 45)),
}, {
text: 'Install New Database',
assigneeId: [2],
startDate: new Date(addDays(startOfTheWeek, 4).setUTCHours(16, 45)),
endDate: new Date(addDays(startOfTheWeek, 4).setUTCHours(18, 15)),
}, {
text: 'Approve New Online Marketing Strategy',
assigneeId: [4],
startDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(19)),
endDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(21)),
}, {
text: 'Upgrade Personal Computers',
assigneeId: [2],
startDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(22, 15)),
endDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(23, 30)),
}, {
text: 'Customer Workshop',
assigneeId: [3],
startDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(18)),
endDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(19)),
recurrenceRule: 'FREQ=WEEKLY;INTERVAL=1',
}, {
text: 'Prepare 2021 Marketing Plan',
assigneeId: [1],
startDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(18)),
endDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(20, 30)),
}, {
text: 'Brochure Design Review',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(21)),
endDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(22, 30)),
}, {
text: 'Create Icons for Website',
assigneeId: [3],
startDate: new Date(addDays(currentStartOfTheWeek, 3).setUTCHours(17)),
endDate: new Date(addDays(currentStartOfTheWeek, 3).setUTCHours(18, 30)),
}, {
text: 'Upgrade Server Hardware',
assigneeId: [4],
startDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(16)),
endDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(17, 30)),
}, {
text: 'Submit New Website Design',
assigneeId: [1],
startDate: new Date(addDays(currentStartOfTheWeek, 5).setUTCHours(23, 30)),
endDate: new Date(addDays(currentStartOfTheWeek, 6).setUTCHours(1)),
}, {
text: 'Launch New Website',
assigneeId: [2],
startDate: new Date(addDays(currentStartOfTheWeek, 4).setUTCHours(19)),
endDate: new Date(addDays(currentStartOfTheWeek, 4).setUTCHours(21)),
},
];
export const schedulerDataSource = new DataSource(data);
export const assignees: Assignee[] = [
{
text: 'Samantha Bright',
id: 1,
}, {
text: 'John Heart',
id: 2,
}, {
text: 'Todd Hoffman',
id: 3,
}, {
text: 'Sandra Johnson',
id: 4,
},
];
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'));
import { DataSource } from 'devextreme-react/common/data';
const addDays = (date, days) => new Date(new Date(date).setUTCDate(date.getUTCDate() + days));
const now = new Date(new Date().setUTCHours(0, 0, 0, 0));
const startOfTheWeek = addDays(now, -now.getUTCDay());
export const currentDate = new Date(2025, 5, 10);
const currentStartOfTheWeek = addDays(currentDate, -currentDate.getUTCDay());
const data = [
{
text: 'Website Re-Design Plan',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 1).setUTCHours(16, 30)),
endDate: new Date(addDays(startOfTheWeek, 1).setUTCHours(18, 30)),
},
{
text: 'Book Flights to San Fran for Sales Trip',
assigneeId: [2],
startDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(19)),
endDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(20)),
allDay: true,
},
{
text: 'Install New Router in Dev Room',
assigneeId: [1],
startDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(21, 30)),
endDate: new Date(addDays(startOfTheWeek, 2).setUTCHours(22, 30)),
},
{
text: 'Approve Personal Computer Upgrade Plan',
assigneeId: [3],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(17)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(18)),
},
{
text: 'Final Budget Review',
assigneeId: [1],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(19)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(20, 35)),
},
{
text: 'New Brochures',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(21, 30)),
endDate: new Date(addDays(startOfTheWeek, 3).setUTCHours(22, 45)),
},
{
text: 'Install New Database',
assigneeId: [2],
startDate: new Date(addDays(startOfTheWeek, 4).setUTCHours(16, 45)),
endDate: new Date(addDays(startOfTheWeek, 4).setUTCHours(18, 15)),
},
{
text: 'Approve New Online Marketing Strategy',
assigneeId: [4],
startDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(19)),
endDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(21)),
},
{
text: 'Upgrade Personal Computers',
assigneeId: [2],
startDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(22, 15)),
endDate: new Date(addDays(currentStartOfTheWeek, 1).setUTCHours(23, 30)),
},
{
text: 'Customer Workshop',
assigneeId: [3],
startDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(18)),
endDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(19)),
recurrenceRule: 'FREQ=WEEKLY;INTERVAL=1',
},
{
text: 'Prepare 2021 Marketing Plan',
assigneeId: [1],
startDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(18)),
endDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(20, 30)),
},
{
text: 'Brochure Design Review',
assigneeId: [4],
startDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(21)),
endDate: new Date(addDays(startOfTheWeek, 5).setUTCHours(22, 30)),
},
{
text: 'Create Icons for Website',
assigneeId: [3],
startDate: new Date(addDays(currentStartOfTheWeek, 3).setUTCHours(17)),
endDate: new Date(addDays(currentStartOfTheWeek, 3).setUTCHours(18, 30)),
},
{
text: 'Upgrade Server Hardware',
assigneeId: [4],
startDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(16)),
endDate: new Date(addDays(currentStartOfTheWeek, 2).setUTCHours(17, 30)),
},
{
text: 'Submit New Website Design',
assigneeId: [1],
startDate: new Date(addDays(currentStartOfTheWeek, 5).setUTCHours(23, 30)),
endDate: new Date(addDays(currentStartOfTheWeek, 6).setUTCHours(1)),
},
{
text: 'Launch New Website',
assigneeId: [2],
startDate: new Date(addDays(currentStartOfTheWeek, 4).setUTCHours(19)),
endDate: new Date(addDays(currentStartOfTheWeek, 4).setUTCHours(21)),
},
];
export const schedulerDataSource = new DataSource(data);
export const assignees = [
{
text: 'Samantha Bright',
id: 1,
},
{
text: 'John Heart',
id: 2,
},
{
text: 'Todd Hoffman',
id: 3,
},
{
text: 'Sandra Johnson',
id: 4,
},
];
<!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" />
<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>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
To customize the Scheduler toolbar in your DevExtreme-powered app, add items to the toolbar.items[] array. DevExtreme Scheduler supports the following toolbar item types:
-
Predefined Controls
- "dateNavigator"
Displays a ButtonGroup component with next/previous buttons and a date interval button that invokes a dropdown calendar. Define options.items to customize the control. You can add new buttons, and specify button availability/order. - "viewSwitcher"
Switches between view types (day, week, month, and others). - "today"
A "Today" button (navigates to the current date).
- "dateNavigator"
-
DevExtreme Components
You can configure a DevExtreme component within a toolbar item element. In this demo, we extended the toolbar with a Button and SelectBox. -
Custom Controls
Specify items[].render or component to implement custom controls.
The default Scheduler toolbar displays "dateNavigator" and "viewSwitcher" predefined controls.