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@percybolmer
Last active August 27, 2022 07:21
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Simple HTML website with yet not websockets
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>PP - Websockets</title>
</head>
<body>
<div class="center">
<h1>Amazing Chat Application</h1>
<h3 id="chat-header">Currently in chat: general</h3>
<!--
Here is a form that allows us to select what Chatroom to be in
-->
<form id="chatroom-selection">
<label for="chatroom">Chatroom:</label>
<input type="text" id="chatroom" name="chatroom"><br><br>
<input type="submit" value="Change chatroom">
</form>
<br>
<!--
Textarea to show messages from users
-->
<textarea class="messagearea" id="chatmessages" readonly name="chatmessages" rows="4" cols="50"
placeholder="Welcome to the general chatroom, here messages from others will appear"></textarea>
<br>
<!--
Chatroom-message form is used to send messages
-->
<form id="chatroom-message">
<label for="message">Message:</label>
<input type="text" id="message" name="message"><br><br>
<input type="submit" value="Send message">
</form>
</div>
<!--
Javascript that is used to Connect to Websocket and Handle New messages
-->
<script type="text/javascript">
// selectedchat is by default General.
var selectedchat = "general";
/**
* changeChatRoom will update the value of selectedchat
* and also notify the server that it changes chatroom
* */
function changeChatRoom() {
// Change Header to reflect the Changed chatroom
var newchat = document.getElementById("chatroom");
if (newchat != null && newchat.value != selectedchat) {
console.log(newchat);
}
return false;
}
/**
* sendMessage will send a new message onto the Websocket
* */
function sendMessage() {
var newmessage = document.getElementById("message");
if (newmessage != null) {
console.log(newmessage);
}
return false;
}
/**
* Once the website loads, we want to apply listeners and connect to websocket
* */
window.onload = function () {
// Apply our listener functions to the submit event on both forms
// we do it this way to avoid redirects
document.getElementById("chatroom-selection").onsubmit = changeChatRoom;
document.getElementById("chatroom-message").onsubmit = sendMessage;
// Check if the browser supports WebSocket
if (window["WebSocket"]) {
console.log("supports websockets");
} else {
alert("Not supporting websockets");
}
};
</script>
<style type="text/css">
body {
overflow: hidden;
padding: 0;
margin: 0;
width: 100%;
height: 100%;
background: rgb(66, 56, 56);
}
.center {
margin: auto;
width: 50%;
border: 3px solid green;
padding: 10px;
}
</style>
</body>
</html>
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