How to get access to the containing form of an input?

Last Updated : 17 Sep, 2019

The job is to select the <form> element from the given <input> element of the form. Here few of the important techniques are discussed. We are going to use JavaScript.
Approach:

First select the <input> element of the form.
Use one of the .form property or .closest(‘form’) method to get access to the parent form element.

Example 1: This example using the approach discussed above and using .form property.

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        Get access to the containing form of an input. 
    </title> 
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"> 
    </script> 
</head> 
  
<body id="body" align="center"> 
    <h1 style="color:green;">   
            GeeksforGeeks   
        </h1> 
    <p id="GFG_UP" 
       style="font-size: 15px; font-weight: bold;"> 
    </p> 
    <form id="formElement"> 
        Input_1: 
        <input id="input1" type="text" /> 
        <br> 
        <input type="checkbox" name="input_2">  
        Input_2 
    </form> 
    <br> 
    <button onclick="GFG_Fun()"> 
        click here 
    </button> 
    <p id="GFG_DOWN" 
       style="font-size: 24px; font-weight: bold; color:green;"> 
    </p> 
    <script> 
        var el_up = document.getElementById('GFG_UP'); 
        var el_down = document.getElementById('GFG_DOWN'); 
        var input = document.getElementById('input1'); 
        el_up.innerHTML = "Click on the button to select the " + 
                          "form element from the input element."; 
  
        function GFG_Fun() { 
            var form = input.form; 
            el_down.innerHTML =  
              "Id of <form> is '" + $(form).attr("id") + "'"; 
        } 
    </script> 
</body> 
  
</html> 

Output:

Before clicking on the button:
After clicking on the button:

Example 2: This example using the approach discussed above and using .closest() method.

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        Get access to the containing form of an input. 
    </title> 
    <script src= 
"https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"> 
    </script> 
</head> 
  
<body id="body" align="center"> 
    <h1 style="color:green;">   
            GeeksforGeeks   
        </h1> 
    <p id="GFG_UP" 
       style="font-size: 15px; font-weight: bold;"> 
    </p> 
    <form id="formElement"> 
        Input_1: 
        <input id="input1" type="text" /> 
        <br> 
        <input type="checkbox" name="input_2">  
        Input_2 
    </form> 
    <br> 
    <button onclick="GFG_Fun()"> 
        click here 
    </button> 
    <p id="GFG_DOWN" 
       style="font-size: 24px; font-weight: bold; color:green;"> 
    </p> 
    <script> 
        var el_up = document.getElementById('GFG_UP'); 
        var el_down = document.getElementById('GFG_DOWN'); 
        var input = document.getElementById('input1'); 
        el_up.innerHTML = "Click on the button to select the "+ 
                          "form element from the input element."; 
  
        function GFG_Fun() { 
            var form = $(input).closest('form'); 
            el_down.innerHTML =  
              "Id of <form> is '" + $(form).attr("id") + "'"; 
        } 
    </script> 
</body> 
  
</html> 

Output:

Before clicking on the button:
After clicking on the button:

My Personal Notes

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