JSFiddle - React, Tailwind, and code Playground

by Amit Bhagat

HTML

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<input name="myFile" type="file" id="fileup[1]">
<button id="button1">
Show
</button>

JavaScript

function fileSizeCheck(idx)
    {
    		// Element reference
    		var element = $('input[id="fileup['+idx+']"]');
        
        var getName = element.val();
        var extension = getName.split(".").pop().toLowerCase();
				
        var fileSize = element.get(0).files[0].size;
        alert( 'File size is: ' + fileSize );
    }

	$(document).ready(function(){
  	$('#button1').click( function(){
    	fileSizeCheck(1);
    });
  })