The HTML DOM input hidden form property returns the reference of the form that contain the hidden input field in the HTML document.
Syntax
Following is the syntax −
object.form
Example
Let us see an example of HTML DOM input hidden form property −
<!DOCTYPE html> <html> <head> <style> body{ text-align:center; background-color:#363946; color:#fff; } form{ margin:2.5rem auto; } button{ background-color:#db133a; border:none; cursor:pointer; padding:8px 16px; color:#fff; border-radius:5px; font-size:1.05rem; } .show{ font-weight:bold; font-size:1.4rem; } </style> </head> <body> <h1>form Property Demo</h1> <form id="Form 1"> <fieldset> <legend>Form 1</legend> Here is hidden input field: <input type="hidden" class="hiddenField"> </fieldset> </form> <button onclick="identify()">Identify Hidden Input Field</button> <p class="show"></p> <script> function identify() { var formId = document.querySelector(".hiddenField").form.id; document.querySelector(".show").innerHTML = "Hi! I'm from " + formId; } </script> </body> </html>
Output
This will produce the following output −
Click on “Identify Hidden Input Field” button to identify the form which contain the hidden input field.