Example T1265809
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DevExtreme Chat - Getting Started

This repository stores code for the following DevExpress tutorial: Getting Started with DevExtreme Chat. The project creates an interactive interface that allows users to send and receive messages in real time.

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Example Code

jQuery/src/index.js
JavaScript
const firstUser = { id: "1", name: "User" }; const secondUser = { id: "2", name: "Feedback Bot", avatarUrl: "./bot.png" }; const initialMessages = [{ timestamp: Date.now(), author: secondUser, text: `Hello! We'd love to hear your feedback. Please share your thoughts below!` }]; const alert = [{ id: 1, message: "Session expired" }]; $(() => { function sendToBackend() { setTimeout(() => { chat.option("typingUsers", []); chat.renderMessage({ text: "Thanks for helping us improve!", author: secondUser, timestamp: Date.now() }); chat.option("alerts", alert); chat.option("disabled", true); }, 1000); } const chat = $("#chat") .dxChat({ width: 400, height: 450, user: firstUser, onMessageEntered: ({ component, message }) => { component.renderMessage(message); chat.option("typingUsers", [secondUser]); sendToBackend(); }, items: initialMessages }) .dxChat("instance"); });
Angular/src/app/app.component.html
HTML
<dx-chat [disabled]="disabled" [width]="400" [height]="450" [user]="firstUser" [items]="messages" [typingUsers]="typingUsers" (onMessageEntered)="onMessageEntered($event)" [alerts]="alerts" > </dx-chat>
Angular/src/app/app.component.ts
TypeScript
import { Component } from '@angular/core'; import { DxChatTypes } from "devextreme-angular/ui/chat"; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.scss'], }) export class AppComponent { firstUser: DxChatTypes.User = { id: "1", name: "User", }; secondUser: DxChatTypes.User = { id: "2", name: "ChatBack", avatarUrl: "./bot.png", }; messages: DxChatTypes.Message[] = [ { timestamp: Date.now(), author: this.secondUser, text: `Hello! We'd love to hear your feedback. Please share your thoughts below!`, }, ]; alerts: DxChatTypes.Alert[] = []; typingUsers: DxChatTypes.User[] = []; disabled: boolean = false; onMessageEntered({ message }) { this.messages = [...this.messages, message]; this.typingUsers = [this.secondUser]; this.sendToBackend(); } sendToBackend() { setTimeout(() => { this.typingUsers = []; this.messages = [ ...this.messages, { text: "Thanks for helping us improve!", author: this.secondUser, timestamp: Date.now(), }, ]; this.alerts = [ ...this.alerts, { id: 1, message: "Session expired", }, ]; this.disabled = true; }, 1000); } }
Vue/src/components/HomeContent.vue
Code
<template> <DxChat width="400" height="450" :disabled="disabled" :alerts="alerts" :user="firstUser" :items="messages" :typingUsers="typingUsers" @message-entered="onMessageEntered" /> </template> <script setup> import { ref } from "vue"; import DxChat from "devextreme-vue/chat"; const firstUser = { id: "1", name: "User" }; const secondUser = { id: "2", name: "Feedback Bot", avatarUrl: "./bot.png" }; const initialMessages = [{ timestamp: Date.now(), author: secondUser, text: `Hello! We'd love to hear your feedback. Please share your thoughts below!` }]; const messages = ref(initialMessages); const typingUsers = ref([]); const alerts = ref([]); const disabled = ref(false); const onMessageEntered = ({ message }) => { messages.value = [...messages.value, message]; typingUsers.value = [secondUser]; sendToBackend(); }; const sendToBackend = () => { setTimeout(() => { typingUsers.value = []; messages.value = [ ...messages.value, { text: "Thanks for helping us improve!", author: secondUser, timestamp: Date.now(), }, ]; alerts.value = [ ...alerts.value, { id: 1, message: "Session expired", }, ]; disabled.value = true; }, 1000); }; </script>
React/src/App.js
JavaScript
import React, { useCallback, useState } from "react"; import Chat from "devextreme-react/chat"; const firstUser = { id: "1", name: "User" }; const secondUser = { id: "2", name: "Feedback Bot", avatarUrl: "./bot.png" }; const initialMessages = [{ timestamp: Date.now(), author: secondUser, text: `Hello! We'd love to hear your feedback. Please share your thoughts below!` }]; const App = () => { const [messages, setMessages] = useState(initialMessages); const [typingUsers, setTypingUsers] = useState([]); const [alerts, setAlerts] = useState([]); const [disabled, setDisabled] = useState(false); const onMessageEntered = useCallback(({ message }) => { setMessages((prevMessages) => [...prevMessages, message]); setTypingUsers([secondUser]); sendToBackend(); }, []); const sendToBackend = () => { setTimeout(() => { setTypingUsers([]); setMessages((prevMessages) => [ ...prevMessages, { text: "Thanks for helping us improve!", author: secondUser, timestamp: Date.now(), }, ]); setAlerts([ { id: 1, message: "Session expired", }, ]); setDisabled(true); }, 3000); }; return ( <Chat disabled={disabled} alerts={alerts} width={400} height={450} user={firstUser} onMessageEntered={onMessageEntered} items={messages} typingUsers={typingUsers} /> ); }; export default App;

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