my_code/File reader.html at main · Gul7333/my_code · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Text File Reader</title>
</head>
<body>
  <input type="file" id="fileInput" accept=".txt" onchange="readFile()">
  <pre id="output"></pre>

  <script>
    async function readFile() {
      const fileInput = document.getElementById('fileInput');
      const output = document.getElementById('output');
      const file = fileInput.files[0];

      if (file) {
        const readableStream = file.stream().getReader();
        const decoder = new TextDecoder();
        let partialContent = '';

        while (true) {
          const { done, value } = await readableStream.read();

          if (done) {
            break;
          }

          partialContent += decoder.decode(value, { stream: true });

          // Display content progressively
          output.textContent = partialContent;
        }

        // Final update
        output.textContent = partialContent;
      }
    }
  </script>
</body>
</html>