HTML | DOM Ol Object

The DOM Ol Object is used to represent the HTML <ol> element . The ol element is accessed by getElementById(). To read more about lists check HTML | Lists.

Properties:

compact: It is used to set or return whether the size of the list would be displayed normal or not.
reversed: It is used to set or return whether the list item is displayed in descending order or ascending order.
start: It is used to set or return the value of the start attribute in an <ol> element.
type: It is used to set or return the value of the type attribute in an <ol> element.

Syntax:

document.getElementById("ID");

Where “id” is the ID assigned to the “ol” tag. Example-1:

html

<!DOCTYPE>
<html>
 
<head>
    <style>
        h1 {
            color: green;
        }
    </style>
</head>
 
<body>
    <h1>
        GEEKSFORGEEKS
    </h1>
    <h2>
         DOM Ol Object
    </h2>
    <p>
        Ordered Lists
    </p>
    <!--  Assigning id to 'ol' tag.  -->
    <ol id="GFG">
        <li>one</li>
        <li>two</li>
        <li>three</li>
    </ol>
   
    <button onclick="Geeks()">Submit</button>
   
    <script>
        function Geeks() {
           
            //  Accessing ol tag
            //  and  starts with 101.
            var g = document.getElementById("GFG");
            g.start = "100";
        }
    </script>
</body>
 
</html>

Output: Before Clicking On button:

After Clicking On Button:

Example-2 : Ol Object can be created by using the document.createElement method.

html

<!DOCTYPE>
<html>
 
<head>
    <style>
        h1 {
            color: green;
        }
    </style>
</head>
 
<body>
    <h1>
        GEEKSFORGEEKS
    </h1>
    <h2>
         DOM Ol Object
    </h2>
    <button onclick="Geeks()">Submit</button>
    <script>
        function Geeks() {
            
            //  Creating 'ol' object
            var g = document.createElement("OL");
            g.setAttribute("id", "GFG");
            document.body.appendChild(g);
 
            var x = document.createElement("LI");
            var y = document.createTextNode("geeks");
            x.appendChild(y);
            document.getElementById("GFG").appendChild(x);
 
            var w = document.createElement("LI");
            var f = document.createTextNode("sudo");
            w.appendChild(f);
            document.getElementById("GFG").appendChild(w);
        }
    </script>
</body>
 
</html>