Javascript DOM HTML Input FileUpload required Property get

Introduction

Find out if a file must be selected/uploaded before submitting a form: 

var x = document.getElementById("myFile").required;

Click button to find out if a file in the file upload field is required.

View in separate window 

<!DOCTYPE html>
<html>
<body>

<form action="/action_page.php">
  Select a file: <input type="file" id="myFile" name="usr_file" required>
  <input type="submit">
</form>//from   ww  w.  j  a va2 s  . c  om

<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myFile").required;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The required property sets or gets whether a file in the file upload field is required.

This property mirrors the HTML required attribute.

The required property accepts and returns a boolean value.

Value Description
true The file upload field is a required part of form submission
false Default. The file upload field is not a required part of form submission

The required property returns true if the file upload field is a required part of form submission, otherwise it returns false.




PreviousNext

Related