How to check input file is empty or not using JavaScript/jQuery ?

Given an HTML document containing input element and the task is to check whether an input element is empty or not with the help of JavaScript.

Approach 1: Use element.files.length property to check file is selected or not. If element.files.length property returns 0 then the file is not selected otherwise file is selected.

Example: This example implements the above approach.



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<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        How to check input file is empty
        or not using JavaScript?
    </title>
</head>
  
<body style = "text-align:center;"> 
      
    <h1 style = "color:green;"> 
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style =
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <input type="file" name="File" id="file" />
      
    <br><br>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style =
        "color:green; font-size: 20px; font-weight: bold;">
    </p>
      
    <script> 
        var up = document.getElementById('GFG_UP');
        var down = document.getElementById('GFG_DOWN');
        var file = document.getElementById("file");
      
        up.innerHTML = "Click on the button to see"
                    + " if any file is selected";
          
        function GFG_Fun() {
            if(file.files.length == 0 ){
                down.innerHTML = "No files selected";
            } else {
                down.innerHTML = "Some file is selected";
            }
        }
    </script> 
</body> 
  
</html>

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Output:


    

  • Before clicking on the button:
    


    • 

  • 
After clicking on the button:
    


    • 



Approach 2: Use element.files.length property in jQuery to check the file is selected or not. If element.files.length property returns 0 then the file is not selected otherwise file is selected.


Example: This example implements the above approach.











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                                    edit

                                    close




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                                    link

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                                    code
                                




















<!DOCTYPE HTML>   


<html>   


  


<head>  


    <title>  


       JavaScript | Check if input file is empty. 


    </title> 


  


    <script src= 


"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"> 


    </script> 


</head> 


  


<body style = "text-align:center;">   


      


    <h1 style = "color:green;">   


        GeeksForGeeks   


    </h1> 


          


    <p id = "GFG_UP" style =  


        "font-size: 15px; font-weight: bold;"> 


    </p> 


      


    <input type="file" name="File" id="file" /> 


      


    <br><br> 


      


    <button onclick = "GFG_Fun()"> 


        click here 


    </button> 


      


    <p id = "GFG_DOWN" style = 


        "color:green; font-size: 20px; font-weight: bold;"> 


    </p> 


      


    <script>  


        var up = document.getElementById('GFG_UP'); 


        var down = document.getElementById('GFG_DOWN'); 


          


        up.innerHTML = "Click on the button to see" 


                    + " if any file is selected"; 


          


        function GFG_Fun() { 


            if ($('#file')[0].files.length === 0) { 


                down.innerHTML = "No files selected"; 


            } else { 


                down.innerHTML = "Some file is selected"; 


            } 


        } 


    </script>  


</body>   


  


</html> 



















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Output:


    

  • 
Before clicking on the button:
    


    • 

  • 
After clicking on the button:
    


    • 



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