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

0 0 1 minute read

Given an HTML document containing input element, 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 the file is selected.

Example: This example implements the above approach.

html

<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>

Output:

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.

html

<script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"> 
</script> 
<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>

Output:

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!