How To Validate Max File Size Using Javascript

Websolutionstuff | Aug-03-2020 | Categories : Laravel PHP jQuery

This article will show us how to validate max file size using javascript. Many times we have a requirement to check the validation of the maximum file size before uploading to the server. So, I have created a post on max file upload validation jquery.

So, let's see file upload validation in javascript or file upload size validation using jquery.

I have created one blade file and checked file size using the if condition in jquery.

<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>File upload size validation in javascript - websolutionstuff.com</title>
  <link href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>  
</head>
<body>
  <h3 style="text-align: center;">File upload size validation in javascript - websolutionstuff.com</h3>
  <div class="col-md-6 col-md-offset-5"><br>
  <input type="file" name="file"  id="filesizecheck"><br>
  <span id="error-message" class="validation-error-label"></span>
  </div>
</body>
</html>
<script type="text/javascript">
  $(document).ready(function(){
    $('#filesizecheck').on('change',function(){
      for(var i=0; i< $(this).get(0).files.length; ++i){
        var file1 = $(this).get(0).files[i].size;
        if(file1){
          var file_size = $(this).get(0).files[i].size;
          if(file_size > 2000000){
            $('#error-message').html("File upload size is larger than 2MB");
            $('#error-message').css("display","block");
            $('#error-message').css("color","red");
          }else{
            $('#error-message').css("display","none");
          }
        }
      }
    });
  });
</script>

And you will get output like this.

file upload size validation