codecontainer.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Code By Sarfaraz Coding Club -->
    <title>Code Container</title>

<!-- Highlight js library link -->

<link rel="stylesheet"
      href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/styles/default.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.6/highlight.min.js"></script>
<script>hljs.initHighlightingOnLoad();</script>
    <style>
            /* CSS START */
        .code-container{
            width: 50%;
            height: 300px;
            margin: 100px auto;
            background-color: #242424;
            border-radius: 10px;
            padding: 15px;
            position: relative;
            box-shadow: 0px 0px 3px 0px #780066;
        }
        #language{
            text-align: left;
            color: white;
            font-weight: 400;
            background-color: #BD00FF;
            padding: 3px 10px;
            border-radius: 5px;
            position: fixed;
        }
        #copybutton{
            position: absolute;
            top: 10px;
            right: 10px;
            width: 80px;
            height: 30px;
            font-size: 15px;
            background-color: transparent;
            color: #FF95E1;
            border: 1px solid purple;
            border-radius: 5px;
            transition: 0.5s;
        }
        #copybutton:hover{
            background-color: #BD00FF;
            color: white;
            border: none;
        }
        #codes{
            position: absolute;
            top: 50px;
            left: 10px;
            text-align: left;
            color: #C6C6C6;
            line-height: 20px;
            padding: 10px;
        }
        /* CSS END */

    </style>
</head>
<body>
    <div class="code-container">
        <span id="language">HTML</span>
        <button id="copybutton" onclick="copycode(this)">Copy</button>
        <code id="codes" class="html">
            //Thank for watching video
            //like share and Subscribe
        </code>
    </div>
</body>

<script>
    function copycode(){
        const codeElement = document.querySelector('#codes');
        const code = codeElement.textContent;
        const textarea = document.createElement('textarea');
        textarea.value = code;
var cc = document.getElementById('copybutton');
        document.body.appendChild(textarea);
        textarea.select();
        document.execCommand('copy');
        document.body.removeChild(textarea);
cc.innerHTML = "Copied!";
    }
</script>

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</html>