Chat window user interface using listview in EJ2 JavaScript Listview control

8 Aug 20237 minutes to read

ListView can be customized as chat window. To achieve that, use the ListView template property and Avatar control.

* The Listview template property is used to showcase the ListView as chat window.
* Avatar control is used to design the image of contact person.

Refer the below template code snippet for Template of chat window.

let template =
  '<div class="settings">' +
  '${if(chat!=="receiver")}' +
  '<div id="content">' +
  '<div class="name">${text}</div>' +
  '<div id="info">${contact}</div></div>' +
  '${if(avatar!=="")}' +
  '<div id="image"><span class="e-avatar img1 e-avatar-circle">${avatar}</span></div>' +
  "${else}" +
  '<div id="image"><span class="${pic} img1 e-avatar e-avatar-circle"> </span></div>' +
  "${/if}" +
  "${else}" +
  '${if(avatar!=="")}' +
  '<div id="image2"><span class="e-avatar img2 e-avatar-circle">${avatar}</span></div>' +
  "${else}" +
  '<div id="image2"><span class="${pic} img2 e-avatar e-avatar-circle"> </span></div>' +
  "${/if}" +
  '<div id="content1">' +
  '<div class="name1">${text}</div>' +
  '<div id="info1">${contact}</div>' +
  "</div>" +
  "${/if}" +
  "</div>";

Chat order in template

In ListView template, we have rendered the list items based on receiver and sender information from dataSource of listview.

Adding messages to chat window

* Use textbox to get message from user.
* Add the textbox message to ListView dataSource using [addItem](../../api/list-view/#additem) method.

document.getElementById("btn").addEventListener("click", e => {
  var value = document.getElementById("name").value;
  document
    .getElementById("List")
    .ej2_instances[0].addItem([
      {
        text: "Amenda",
        contact: value,
        id: "2",
        avatar: "A",
        pic: "",
        chat: "receiver"
      }
    ]);
});

index.js

var template =
  '<div class="settings">' +
  '${if(chat!=="receiver")}' +
  '<div id="content">' +
  '<div class="name">${text}</div>' +
  '<div id="info">${contact}</div></div>' +
  '${if(avatar!=="")}' +
  '<div id="image"><span class="e-avatar img1 e-avatar-circle">${avatar}</span></div>' +
  "${else}" +
  '<div id="image"><span class="${pic} img1 e-avatar e-avatar-circle"> </span></div>' +
  "${/if}" +
  '${else}'+
 '${if(avatar!=="")}' +
  '<div id="image2"><span class="e-avatar img2 e-avatar-circle">${avatar}</span></div>' +
  "${else}" +
  '<div id="image2"><span class="${pic} img2 e-avatar e-avatar-circle"> </span></div>' +
  "${/if}" +
  '<div id="content1">' +
  '<div class="name1">${text}</div>' +
  '<div id="info1">${contact}</div>' +
  "</div>"+
  '${/if}'+
  "</div>";

//Define an array of JSON data
var dataSource = [
  {
    text: "Jenifer",
    contact: "Hi",
    id: "1",
    avatar: "",
    pic: "pic01", chat: "sender"
  },
  { text: "Amenda", contact: "Hello", id: "2", avatar: "A", pic: "", chat: "receiver" },
  {
    text: "Jenifer",
    contact: "What Knid of application going to launch",
    id: "4",
    avatar: "",
    pic: "pic02",chat: "sender"
  },
  {
    text: "Amenda ",
    contact: "A knid of Emergency broadcast App",
    id: "5",
    avatar: "A",
    pic: "", chat: "receiver"
  },
  {
    text: "Jacob",
    contact: "Can you please elaborate",
    id: "6",
    avatar: "",
    pic: "pic04",chat: "sender"
  },
];

var listObj = new ej.lists.ListView({

  //Set defined data to dataSource property.
    //Set the defined data to the dataSource property
  dataSource: dataSource,
  //Map the appropriate columns to the fields property
  fields: { text: "text" },
  //Set the width of the ListView
  width: "350px",
  //Enable the header of the ListView
  showHeader: true,
  //Set the header title
  headerTitle: "Chat",
  //Set the customized template
  template: template,
});

listObj.appendTo('#List');
var button = new ej.buttons.Button();

// Render initialized button.
button.appendTo('#btn');

document.getElementById('btn').addEventListener('click', (e) => { 
  var value = document.getElementById('name').value;
   document.getElementById('List').ej2_instances[0].addItem([{ text: "Amenda", contact: value, id: "2", avatar: "A", pic: "", chat: "receiver" }]);
   document.getElementById('name').value = "";
});

index.html

<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 for ListView </title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Essential JS 2 for ListView UI Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-layouts/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/25.1.35/ej2-inputs/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/25.1.35/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="List" tabindex="1"></div>
        <div style="width: 350px;margin: 0 auto;"><input id="name" style="width: 275px" class="e-input" type="text" placeholder="Type your message">
        <button id="btn" style="float:right">Send</button></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>