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CSS

            
              chat-home {
  display: block;
}
chat-home h1.page-header { margin-top: 0; }
!

JS

            
              import { Component, route, DefineMap, DefineList, realtimeRestModel } from "//unpkg.com/can@5/core.mjs";

const Message = DefineMap.extend("Message",{
    id: "number",
    name: "string",
    body: "string",
    created_at: "date"
});

Message.List = DefineList.extend("MessageList",{
    "#": Message
});

Message.connection = realtimeRestModel({
    url: {
        resource: 'https://chat.donejs.com/api/messages',
        contentType: 'application/x-www-form-urlencoded'
    },
    Map: Message,
    List: Message.List
});

const socket = io('https://chat.donejs.com');

socket.on('messages created', function(message){
    Message.connection.createInstance(message);
});
socket.on('messages updated', function(message){
    Message.connection.updateInstance(message);
});
socket.on('messages removed', function(message){
    Message.connection.destroyInstance(message);
});

Component.extend({
    tag: "chat-messages",
    view: `
        <h1 class="page-header text-center">
             Chat Messages
        </h1>
        <h5><a href="{{ routeUrl(page='home') }}">Home</a></h5>

        {{# if(this.messagesPromise.isPending) }}
            <div class="list-group-item list-group-item-info">
                <h4 class="list-group-item-heading">Loading…</h4>
            </div>
        {{/ if }}
        {{# if(this.messagesPromise.isRejected) }}
            <div class="list-group-item list-group-item-danger">
                <h4 class="list-group3-item-heading">Error</h4>
                <p class="list-group-item-text">{{ this.messagesPromise.reason }}</p>
            </div>
        {{/ if }}
        {{# if(this.messagesPromise.isResolved) }}
            {{# for(message of this.messagesPromise.value) }}
                <div class="list-group-item">
                    <h4 class="list-group3--item-heading">{{ message.name }}</h4>
                    <p class="list-group-item-text">{{ message.body }}</p>
                </div>
            {{ else }}
                <div class="list-group-item">
                    <h4 class="list-group-item-heading">No messages</h4>
                </div>
            {{/ for }}
        {{/ if }}

        <form class="row" on:submit="this.send(scope.event)">
            <div class="col-sm-3">
                <input type="text" class="form-control" placeholder="Your name"
                    value:bind="this.name"/>
            </div>
            <div class="col-sm-6">
                <input type="text" class="form-control" placeholder="Your message"
                    value:bind="this.body"/>
            </div>
            <div class="col-sm-3">
                <input type="submit" class="btn btn-primary btn-block" value="Send"/>
            </div>
        </form>`,
    ViewModel: {
        // Properties
        messagesPromise: {
            default(){
                return Message.getList({});
            }
        },
        name: "string",
        body: "string",

        // Methods
        send(event) {
            event.preventDefault();

            new Message({
                name: this.name,
                body: this.body
            }).save().then(() => {
                this.body = "";
            });
        }
    }
});

Component.extend({
    tag: "chat-app",
    view: `
        <div class="container">
            <div class="row">
                <div class="col-sm-8 col-sm-offset-2">
                    {{# eq(this.routeData.page, 'home') }}
                        <h1 class="page-header text-center" on:click="this.addExcitement()">
                            {{ this.message }}
                        </h1>
                        <a href="{{ routeUrl(page='chat') }}"
                            class="btn btn-primary btn-block btn-lg">
                            Start chat
                        </a>
                    {{ else }}
                        <chat-messages/>
                    {{/ eq }}
                </div>
            </div>
        </div>`,
    ViewModel: {
        // Properties
        message: {
            type: "string",
            default: "Chat Home"
        },
        routeData: {
            default(){
                route.register("{page}",{page: "home"});
                route.start();
                return route.data;
            }
        },
        // Methods
        addExcitement(){
            this.message = this.message + "!";
        }
    }
});
!
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