Open In App
Related Articles

HTML | DOM option index Property

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report
The DOM option index Property is used to set or return the index position of option value in a dropdown list. The index starts from zero. Syntax:
  • It is used to return the index property.
    optionObject.index
  • It is used to set the index property.
    optionObject.index = integer 
Property Values:
  • It defines a integer value of index position of option value in a dropmenu list.
Return Value: It returns a numeric value which represent the index position of a option value. Example-1: This example illustrates how to return the option value in the DropDown List.
<!DOCTYPE html>
<html>
  
<head>
    <title>DOM option index Property
  </title>
    <style>
        body {
            text-align: center;
        }
          
        h1 {
            color: green;
        }
    </style>
</head>
  
<body>
    <h1>GeeksforGeeks</h1>
    <h2>DOM option index Property</h2>
    <select id="GFG">
        <option>Choose an option
      </option>
        <option value="html">HTML
      </option>
        <option value="java">JAVA
      </option>
        <option value="C++">C++
      </option>
        <option value="php">PHP
      </option>
        <option value="perl">PERL
      </option>
    </select>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    
    <button onclick="myGeeks()">Submit
  </button>
    
    <p id="sudo"
       style="font-size:25px;
              color:green;">
  </p>
    
    <script>
        function myGeeks() {
            
            // Return option value.
            var x = document.getElementById(
              "GFG").selectedIndex;
            
            var y = document.getElementById(
              "GFG").options;
            
            document.getElementById("sudo").innerHTML = 
              (y[x].text + " is in " + y[x].index +
               "th " + "index position");
        }
    </script>
</body>
  
</html>

                    
Output: Before Clicking On Button: After Clicking On Button : Example-2: This example illustrates how to display all the indexes position of the Options.
<!DOCTYPE html>
<html>
  
<head>
    <title>DOM option index Property
  </title>
    <style>
        body {
            text-align: center;
        }
          
        h1 {
            color: green;
        }
    </style>
</head>
  
<body>
    <h1>GeeksforGeeks</h1>
    <h2>DOM option index Property</h2>
    <select id="GFG">
        <option>Choose an option</option>
        <option value="html">HTML</option>
        <option value="java">JAVA</option>
        <option value="C++">C++</option>
        <option value="php">PHP</option>
        <option value="perl">PERL</option>
    </select>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <button onclick="myGeeks()">Submit
  </button>
    
    <p id="sudo"
       style="font-size:25px;
              color:green;">
    </p>
    
    <script>
        function myGeeks() {
            
            // display all option.
            var w = 
            document.getElementById("GFG");
            
            var txt =
            "All options in a DropDown list: ";
            
            var i;
            for (i = 0; i < w.length; i++) {
                txt = txt + "\n" + w.options[i].text + 
                  " has index: " + w.options[i].index;
            }
            alert(txt);
        }
    </script>
</body>
  
</html>

                    
Output: Before Clicking On Button: After Clicking On Button: Supported Browsers: The browser supported by DOM option index Property are listed below:
  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari


Last Updated : 15 Feb, 2019
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads