create code editor html code example

Example 1: online html editor

<!-- Answer to: "online html editor" -->

<!--
  A common good "online editor" would be:
  https://jsfiddle.net/

  However, for an online editor focusing specifically on html
  this one is pretty good:
  https://html-online.com/editor/
-->

Example 2: basic html text editor code

<!DOCTYPE html>
<html lang="en">
<head>
    <style>
        #printcss {
            margin: 6;
            height: 300;
            width: 300;

        };

        #txt {
            width: 100%;
        }
    </style>

    <script>
        function prt() {
            print();
        };

        function ref() {
            document.location.reload();
        }
    </script>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>printext</title>
</head>
<body>
    <center>
        <button onclick="ref()">new file</button>
        <button id="printcss" onclick="prt()">print</button>
        
        
    </center>
    <textarea name="txt" id="txt" cols="250" rows="1000"></textarea>
</body>
</html>