Backend API
import React, { useState, useCallback } from 'react';
import Chat from 'devextreme-react/chat';
import type { ChatTypes } from 'devextreme-react/chat';
import SelectBox from 'devextreme-react/select-box';
import CheckBox from 'devextreme-react/check-box';
import type { CheckBoxTypes } from 'devextreme-react/check-box';
import type { Format } from 'devextreme-react/common/core/localization';
import {
currentUser,
messages as initialMessages,
dayHeaderFormats as headerFormats,
messageTimestampFormats as messageTimestamps,
messageTimestampLabel,
dayHeaderLabel,
} from './data.ts';
type CheckBoxValue = CheckBoxTypes.Properties['value'];
export default function App() {
const [messages, setMessages] = useState<ChatTypes.Message[]>(initialMessages);
const [showAvatar, setShowAvatar] = useState<CheckBoxValue>(true);
const [showUsername, setShowUsername] = useState<CheckBoxValue>(true);
const [showDayHeaders, setDayHeaders] = useState<CheckBoxValue>(true);
const [dayHeaderFormat, setDayHeaderFormat] = useState<Format>(headerFormats[0]);
const [showMessageTimestamp, setMessageTimestamp] = useState<CheckBoxValue>(true);
const [messageTimestampFormat, setMessageTimestampFormat] = useState<Format>(messageTimestamps[0]);
const [isDisabled, setDisabled] = useState<CheckBoxTypes.Properties['value']>(false);
const onMessageEntered = useCallback(({ message }: ChatTypes.MessageEnteredEvent): void => {
setMessages((prevMessages) => [...prevMessages, message]);
}, []);
return (
<>
<div className="chat-container">
<Chat
height={710}
items={messages}
user={currentUser}
disabled={!!isDisabled}
showAvatar={!!showAvatar}
showUserName={!!showUsername}
showDayHeaders={!!showDayHeaders}
showMessageTimestamp={!!showMessageTimestamp}
dayHeaderFormat={dayHeaderFormat}
messageTimestampFormat={messageTimestampFormat}
onMessageEntered={onMessageEntered}
/>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<CheckBox
text="Avatar"
value={showAvatar}
onValueChange={setShowAvatar}
/>
</div>
<div className="option">
<CheckBox
text="User Name"
value={showUsername}
onValueChange={setShowUsername}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Day Headers"
value={showDayHeaders}
onValueChange={setDayHeaders}
/>
</div>
<div className="option">
<span>Day Header Format:</span>
<SelectBox
items={headerFormats}
value={dayHeaderFormat}
inputAttr={dayHeaderLabel}
onValueChange={setDayHeaderFormat}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Message Timestamp"
value={showMessageTimestamp}
onValueChange={setMessageTimestamp}
/>
</div>
<div className="option">
<span>Message Timestamp Format:</span>
<SelectBox
items={messageTimestamps}
value={messageTimestampFormat}
inputAttr= {messageTimestampLabel}
onValueChange={setMessageTimestampFormat}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Disable Chat"
value={isDisabled}
onValueChange={setDisabled}
/>
</div>
</div>
</>
);
}
import React, { useState, useCallback } from 'react';
import Chat from 'devextreme-react/chat';
import SelectBox from 'devextreme-react/select-box';
import CheckBox from 'devextreme-react/check-box';
import {
currentUser,
messages as initialMessages,
dayHeaderFormats as headerFormats,
messageTimestampFormats as messageTimestamps,
messageTimestampLabel,
dayHeaderLabel,
} from './data.js';
export default function App() {
const [messages, setMessages] = useState(initialMessages);
const [showAvatar, setShowAvatar] = useState(true);
const [showUsername, setShowUsername] = useState(true);
const [showDayHeaders, setDayHeaders] = useState(true);
const [dayHeaderFormat, setDayHeaderFormat] = useState(headerFormats[0]);
const [showMessageTimestamp, setMessageTimestamp] = useState(true);
const [messageTimestampFormat, setMessageTimestampFormat] = useState(messageTimestamps[0]);
const [isDisabled, setDisabled] = useState(false);
const onMessageEntered = useCallback(({ message }) => {
setMessages((prevMessages) => [...prevMessages, message]);
}, []);
return (
<>
<div className="chat-container">
<Chat
height={710}
items={messages}
user={currentUser}
disabled={!!isDisabled}
showAvatar={!!showAvatar}
showUserName={!!showUsername}
showDayHeaders={!!showDayHeaders}
showMessageTimestamp={!!showMessageTimestamp}
dayHeaderFormat={dayHeaderFormat}
messageTimestampFormat={messageTimestampFormat}
onMessageEntered={onMessageEntered}
/>
</div>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<CheckBox
text="Avatar"
value={showAvatar}
onValueChange={setShowAvatar}
/>
</div>
<div className="option">
<CheckBox
text="User Name"
value={showUsername}
onValueChange={setShowUsername}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Day Headers"
value={showDayHeaders}
onValueChange={setDayHeaders}
/>
</div>
<div className="option">
<span>Day Header Format:</span>
<SelectBox
items={headerFormats}
value={dayHeaderFormat}
inputAttr={dayHeaderLabel}
onValueChange={setDayHeaderFormat}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Message Timestamp"
value={showMessageTimestamp}
onValueChange={setMessageTimestamp}
/>
</div>
<div className="option">
<span>Message Timestamp Format:</span>
<SelectBox
items={messageTimestamps}
value={messageTimestampFormat}
inputAttr={messageTimestampLabel}
onValueChange={setMessageTimestampFormat}
/>
</div>
<div className="option-separator"></div>
<div className="option">
<CheckBox
text="Disable Chat"
value={isDisabled}
onValueChange={setDisabled}
/>
</div>
</div>
</>
);
}
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
import type { ChatTypes } from 'devextreme-react/chat';
import type { Format } from 'devextreme-react/common/core/localization';
function getTimestamp(date: Date, offsetMinutes = 0) {
return date.getTime() + offsetMinutes * 60000;
}
const date = new Date();
date.setHours(0, 0, 0, 0);
export const currentUser: ChatTypes.User = {
id: 'c94c0e76-fb49-4b9b-8f07-9f93ed93b4f3',
name: 'John Doe',
};
export const supportAgent: ChatTypes.User = {
id: 'd16d1a4c-5c67-4e20-b70e-2991c22747c3',
name: 'Support Agent',
avatarUrl: '../../../../images/petersmith.png',
};
export const messages: ChatTypes.Message[] = [
{
timestamp: getTimestamp(date, -9),
author: supportAgent,
text: 'Hello, John!\nHow can I assist you today?',
},
{
timestamp: getTimestamp(date, -7),
author: currentUser,
text: 'Hi, I\'m having trouble accessing my account.',
},
{
timestamp: getTimestamp(date, -7),
author: currentUser,
text: 'It says my password is incorrect.',
},
{
timestamp: getTimestamp(date, -7),
author: supportAgent,
text: 'I can help you with that. Can you please confirm your UserID for security purposes?',
},
{
timestamp: getTimestamp(date, 1),
author: currentUser,
text: 'john.doe1357',
},
{
timestamp: getTimestamp(date, 1),
author: supportAgent,
text: '✅ Instructions to restore access have been sent to the email address associated with your account.',
},
];
export const dayHeaderFormats: Format[] = ['dd/MM/yyyy', 'dd.MM.yyyy', 'MMMM dd, yyyy', 'EEEE, MMMM dd'];
export const messageTimestampFormats: Format[] = ['hh:mm a', 'hh:mm:ss a', 'HH:mm', 'HH:mm:ss'];
export const messageTimestampLabel = { 'aria-label': 'Message Timestamp Format' };
export const dayHeaderLabel = { 'aria-label': 'Day Header Format' };
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
function getTimestamp(date, offsetMinutes = 0) {
return date.getTime() + offsetMinutes * 60000;
}
const date = new Date();
date.setHours(0, 0, 0, 0);
export const currentUser = {
id: 'c94c0e76-fb49-4b9b-8f07-9f93ed93b4f3',
name: 'John Doe',
};
export const supportAgent = {
id: 'd16d1a4c-5c67-4e20-b70e-2991c22747c3',
name: 'Support Agent',
avatarUrl: '../../../../images/petersmith.png',
};
export const messages = [
{
timestamp: getTimestamp(date, -9),
author: supportAgent,
text: 'Hello, John!\nHow can I assist you today?',
},
{
timestamp: getTimestamp(date, -7),
author: currentUser,
text: "Hi, I'm having trouble accessing my account.",
},
{
timestamp: getTimestamp(date, -7),
author: currentUser,
text: 'It says my password is incorrect.',
},
{
timestamp: getTimestamp(date, -7),
author: supportAgent,
text: 'I can help you with that. Can you please confirm your UserID for security purposes?',
},
{
timestamp: getTimestamp(date, 1),
author: currentUser,
text: 'john.doe1357',
},
{
timestamp: getTimestamp(date, 1),
author: supportAgent,
text: '✅ Instructions to restore access have been sent to the email address associated with your account.',
},
];
export const dayHeaderFormats = ['dd/MM/yyyy', 'dd.MM.yyyy', 'MMMM dd, yyyy', 'EEEE, MMMM dd'];
export const messageTimestampFormats = ['hh:mm a', 'hh:mm:ss a', 'HH:mm', 'HH:mm:ss'];
export const messageTimestampLabel = { 'aria-label': 'Message Timestamp Format' };
export const dayHeaderLabel = { 'aria-label': 'Day Header Format' };
<!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/26.1.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="./bundle.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
<script src="bundles/vendor/react.vendor.js"></script>
<script src="./bundle.js"></script>
</body>
</html>
#app {
min-width: 720px;
display: flex;
gap: 20px;
}
.chat-container {
display: flex;
flex-grow: 1;
align-items: center;
justify-content: center;
}
.options {
padding: 20px;
display: flex;
flex-direction: column;
min-width: 280px;
background-color: rgba(191, 191, 191, 0.15);
gap: 16px;
}
.dx-chat {
max-width: 480px;
}
.caption {
font-size: var(--dx-font-size-sm);
font-weight: 500;
}
.option-separator {
border-bottom: 1px solid var(--dx-color-border);
}
.dx-avatar {
border: 1px solid var(--dx-color-border);
}