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

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.

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<!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>

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Output:


    

  • 
Before clicking on the button:
    

    

    • 

  • 
After clicking on the button:
    



    

    • 



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











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<!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> 



















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Output:


    

  • 
Before clicking on the button:
    


    • 

  • 
After clicking on the button:
    


    • 



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