<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>👨💻The Secret Message Chiper</title>
<style>
/*
CSS
Untuk panggil sintaks, langsung ketik nama sintaksnya
Untuk panggil class, tambahkan titik diawal nama sintaksnya
Untuk panggil id, tambahkan hashtag diawal nama sintaksnya
*/
body{
background-color: rgb(40, 40, 40);
color: greenyellow;
}
.container{
max-width: 500px;
border: 2px solid greenyellow;
margin: 50px auto;
padding: 20px;
}
textarea, input{
width: 100%;
background-color: gray;
color: greenyellow;
border: 1px solid greenyellow;
padding: 10px;
margin-bottom: 15px;
}
button{
background-color: greenyellow;
cursor: pointer;
padding: 10px;
border: none;
font-weight: bold;
}
.output{
min-height: 50px;
background-color: grey;
padding: 15px;
border-radius: 5px;
word-wrap: break-word;
}
</style>
</head>
<body>
<div class="container">
<h1>🕵️♂️The Secret Message Chiper</h1>
<label for="inputMessage">secret Message</label>
<textarea name="" id="secretMessage" placeholder="Text Message here..."></textarea>
<label for="KeyNumber">Key (Number)</label>
<input type="number" name="" id="KeyNumber">
<button onclick="process(true)">Enkription</button>
<button onclick="process(false)">Dekription</button>
<h3>Hasil :</h3>
<div id="Result" class="output"></div>
</div>
<script>
function process(isEncrypt) {
const Text = document.getElementById("secretMessage").value;
let key = parseInt(document.getElementById("KeyNumber").value);
let Result = "";
if (!isEncrypt) {
key = -key;
}
for (let index = 0; index < Text.length; index++) {
const element = Text[index];
let charCode = Text.charCodeAt(index);
if (charCode >= 65 && charCode <= 90) {
Result += String.fromCharCode(
((charCode - 65 + key) % 26 + 26) % 26 + 65
);
} else if (charCode >= 97 && charCode <= 122) {
Result += String.fromCharCode(
((charCode - 97 + key) % 26 + 26) % 26 + 97
);
} else {
Result += Text[index];
}
}
document.getElementById("Result").innerText = Result;
}
</script>
</body>
</html>
