Access File Contents in jQuery Callback Function

jQuery Web Development Front End Technology

Let’s say the following is our file and we need to read this file using jQuery.

The name of the file details −

Example

Following is the code −

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Document</title>
</head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<body>
   <input type="file" id="readFileDemo" onchange="chooseFile()">
</body>
<script>
   function chooseFile() {
      dataFromMyFile = document.getElementById("readFileDemo").files[0];
      readDataFromFile = new FileReader();
      readDataFromFile.onload = () => {
         data = readDataFromFile.result;
         console.log("Your File Data is=");
         console.log(data);
      };
      readDataFromFile.readAsText(dataFromMyFile);
   }
</script> 
</html>

To run the above program, save the file name “anyName.html(index.html)”. Right click on the file and select the option “Open with Live Server” in VSCode editor −