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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<title>Chat application</title>
<style>
#messages {
height : 300px ;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-6 offset-md-3 col-sm-12">
<h1 class="text-center">
Chat Application
<button id="clear" class="btn btn-danger">Clear</button>
</h1>
<div id="status"></div>
<div id="chat">
<input type="text" id="username" class="form-control" placeholder="Enter Name..">
<br/>
<div class="card">
<div id="messages" class="card-block">
</div>
</div>
<br/>
</div>
<textarea id="textarea" class="form-control" placeholder="Enter Message.."></textarea>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"></script>
<script>
(function(){
var element = function(id){
return document.getElementById(id);
}
//get Elements
var status = element('status');
var messages= element('messages');
var textarea=element('textarea');
var username= element('username');
var clearBtn=element('clear');
//set default status
var statusDefault = status.textContent;
var setStatus = function(s){
//set status
status.textContent= s;
if(s!= statusDefault){
var delay = setTimeout(function(){
setStatus(statusDefault)
},4000)
}
}
//Connect to socket.io
//var socket = io.connect('http://localhost:4000')
var socket = io();
//check for connection
if(socket != undefined){
console.log('Connected to socket...')
//handle output
socket.on('output', function(data){
if(data.length){
for(var x= 0; x<data.length; x++){
var message = document.createElement('div');
message.setAttribute('class','chat-message');
message.textContent = data[x].name + ": " + data[x].message;
messages.appendChild(message);
messages.insertBefore(message.firstChild, message);
}
}
})
//Get status from server
socket.on('status',function(data){
//Get message staus
setStatus((typeof data === 'object')? data.message: data);
//If status is clear, clear text
if(data.clear){
textarea.value = '';
}
})
//handle input
textarea.addEventListener('keydown', function(event){
if(event.which === 13 && event.shiftKey == false){
socket.emit('input',{
name: username.value,
message: textarea.value
})
event.preventDefault()
}
})
//Handle chat Clear
clearBtn.addEventListener("click", function(){
socket.emit('clear')
})
//Clear message
socket.on('cleared', function(){
messages.textContent = '';
})
}
})();
</script>
</body>
</html>