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= </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:
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