index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Barcode Generator</title>
    <style>
      @media print {
        *:not(canvas) {
          display:none;
        }
        html, body {
          display: flex;
          justify-content: center;
          align-items: center;
          min-height: 90vh;
        }
      }
      #barcodeContainer {
        margin-top: 20px;
      }
      form {
        display: flex;
      }
      form > * {
        margin: 0 1em 0 0;
      }
    </style>
  </head>
  <body>
      <form id="barcodeForm" onsubmit="event.preventDefault(); generateBarcode()">
        <input type="text" id="labelInput" placeholder="Enter a label..." required />
        <input type="text" id="barcodeInput" placeholder="Enter a barcode value..." required />
        <button type="submit">Generate Barcode</button>
        <button onclick="window.print()" style="float:right;">Print Barcode</button>
      </form>
      
    <canvas id="barcodeContainer"></canvas>
    
    <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.6/dist/JsBarcode.all.min.js"></script>
    
    <script>
      function generateBarcode() {
        const barcodeValue = $('#barcodeInput').val().trim();
        const labelValue = $('#labelInput').val().trim();
        
        $(`<canvas id="barcodeContainer"></canvas>`).replaceAll('body > canvas');

        const label = `${labelValue}\x0A\x09\x0D${barcodeValue}`
        
        JsBarcode("#barcodeContainer", barcodeValue, { text: label });
      }
      
      $('#barcodeForm').on('submit', function (event) {
          event.preventDefault();
          generateBarcode();
      });
    </script>
  </body>
</html>