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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="file">Choose a text file:</label><input type="file" id="file"  onchange="readFileContent(this.files)"/><br/>
<p>
<textarea rows=15 cols=50 id="fileContent"></textarea> 
 
<script>
  function readFileContent(files) {
    console.log("In readFileContent");
 
      var reader = new FileReader();
 
      // Called when the file content is loaded, e.target.result is
      // The content
      reader.onload = function(e) {   
        // display content in the textarea with id="fileContent"
        document.getElementById("fileContent").value= e.target.result;
      };   
 
      // Read in the tfile as text
      console.log("Reading file:" + files[0].name);
      
      // Start reading asynchronously the file
      reader.readAsText(files[0]);
    }
</script>
</body>
</html>
Output 300px

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