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IE supports the HTML5 File API

Javascript Web Development Front End Scripts

Internet Explorer's support for the HTML5 File API varies by version. IE9 does not support the File API, but IE10 and later versions provide full support for file operations.

File API Browser Support

The File API allows web applications to read file contents and metadata. Here's the IE support timeline:

  • IE9: No File API support
  • IE10+: Full File API support including FileReader, File, and Blob objects
  • Modern browsers: Complete support across Chrome, Firefox, Safari, and Edge

Example: File Reading with File API

This example demonstrates reading a text file using the File API, which works in IE10+ and all modern browsers:

<!DOCTYPE html>
<html>
<head>
   <title>File API Example</title>
</head>
<body>
   <h2>HTML5 File API Demo</h2>
   <input type="file" id="fileInput" accept=".txt">
   <div id="output"></div>

   <script>
      document.getElementById('fileInput').addEventListener('change', function(event) {
         const file = event.target.files[0];
         
         if (file) {
            const reader = new FileReader();
            
            reader.onload = function(e) {
               document.getElementById('output').innerHTML = 
                  '<h3>File Contents:</h3><pre>' + e.target.result + '</pre>';
            };
            
            reader.onerror = function() {
               document.getElementById('output').innerHTML = 
                  '<p style="color: red;">Error reading file</p>';
            };
            
            reader.readAsText(file);
         }
      });
   </script>
</body>
</html>

Feature Detection

Always check for File API support before using it:

<script>
   function checkFileAPISupport() {
      if (window.File && window.FileReader && window.FileList && window.Blob) {
         console.log('File API is supported');
         return true;
      } else {
         console.log('File API is not supported');
         return false;
      }
   }

   // Use the check
   if (checkFileAPISupport()) {
      // Safe to use File API
      document.getElementById('fileInput').style.display = 'block';
   } else {
      // Provide fallback or show message
      document.getElementById('output').innerHTML = 
         '<p>Your browser does not support the File API</p>';
   }
</script>

Browser Compatibility

Browser File API Support Version
Internet Explorer ? 10+
Chrome ? 6+
Firefox ? 3.6+
Safari ? 6+

Common File API Methods

The File API provides several methods for reading files:

  • readAsText() - Reads file as plain text
  • readAsDataURL() - Reads file as data URL (base64)
  • readAsArrayBuffer() - Reads file as array buffer
  • readAsBinaryString() - Reads file as binary string

Conclusion

While IE9 lacks File API support, IE10 and later versions fully support file operations. Always use feature detection to ensure compatibility across different browser versions.

Updated on: 2026-03-15T23:18:59+05:30

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