HTML | DOM OptionGroup Object

Last Updated : 23 Jan, 2019

The OptionGroup Object in HTML DOM is used to represent the HTML <optgroup> element. The <optgroup> element can be accessed by using getElementById() method.

Property Values: This object contains two property values which are listed below:

disabled: It is used to set or return whether option-group element is disabled, or not.
label: It is used to set or return the value the label attribute of an option-group element.

Syntax:

document.getElementById("ID");

Where ID is assigned to the <optgroup> element.

Example 1:

<!DOCTYPE html>  
<html>  
    <head>  
        <title> 
            HTML DOM Optgroup Object 
        </title>  
    </head>  
      
    <body style = "text-align:center;">  
      
        <h1 style = "color:green;"> 
            GeeksforGeeks 
        </h1>  
          
        <div> 
            A computer science portal for geeks  
        </div>  
          
        <h2>DOM OptionGroup Object</h2>  
          
        <select>  
            <optgroup id = "GFG" label = "Programming Languages">  
                <option value = "C">C</option>  
                <option value = "C++">C++</option>  
                <option value = "Java">Java</optgroup>  
        </select>  
          
        <br><br> 
          
        <button onclick = "Geeks()"> 
            Submit 
        </button> 
          
        <p id = "sudo"></p> 
          
        <script> 
            function Geeks() { 
                var txt = document.getElementById("GFG").label; 
                document.getElementById("sudo").innerHTML = txt; 
            } 
        </script> 
    </body>  
</html>                                   

Output:
before Click on the Button:

After Click on the Button:

Example 2: OptionGroup Object can be created by using the document.createElement Method.

<!DOCTYPE html>  
<html>  
    <head>  
        <title> 
            HTML DOM Optgroup Object 
        </title>  
    </head>  
      
    <body>  
        <h2>GeeksforGeeks</h1>  
          
        <h2>DOM OptionGroup Object</h2>  
          
        <select id = "GFG">  
            <option value = "C">C</option>  
            <option value = "C++">C++</option>  
            <option value = "Java">Java</optgroup>  
        </select>  
          
        <br><br> 
          
        <button onclick = "Geeks()"> 
            Submit 
        </button> 
          
        <script> 
            function Geeks() { 
                var g = document.getElementById("GFG"); 
                  
                var f = document.createElement("OPTGROUP"); 
                  
                f.setAttribute("label",  
                            "Object Oriented Programming"); 
                              
                f.appendChild(g.options[1]); 
                  
                g.insertBefore(f, g.options[1]); 
            } 
        </script> 
    </body>  
</html>                                  