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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Example of use of FileReader with a text file</title>
</head>
<body>
<label for="files">Choose a text file:</label><input type="file" id="files" multiple onchange="readFilesAndDisplayAsText(this.files);"/><br/>
<p>
<textarea rows=30 cols=50 id="filesContent"></textarea> 
 
<script>
  var filesContent = document.getElementById("filesContent");
  
  function readFilesAndDisplayAsText(files) {
    console.log("dans read files");
    // Loop through the FileList and render image files as thumbnails.
    for (var i = 0, f; f = files[i]; i++) {
 
      var reader = new FileReader();      
 
      // Add an onload listener to the reader
      addOnLoadListener(reader, f.name);
      // start reading, will call the listener later, when the file f is read
      reader.readAsText(f);
      
    }
  }
 
  function addOnLoadListener(reader, name) {
    // Add an onload listener that will be able to print the name of the
    // file...
    reader.onload = function(e) {  
        filesContent.value += "###### READING FILE " + name + " ######";
        filesContent.value += e.target.result;
      };
  }
</script>
</body>
</html>
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