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HTML | DOM Ol Object

  • Last Updated : 25 Jan, 2019

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:






<!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.




<!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>

Output :

Before Clicking On Button:

After Clicking On Button:

Supported Browsers: The browser supported by DOM Ol Object are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Safari

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