HTML DOM Datalist Object

Last Updated : 14 Jun, 2023

The DOM Datalist Object is used to represent the HTML <Datalist> element. The Datalist element is accessed by getElementById().

Properties: It has an 'Option' attribute which is used to return the collection of all options values in a datalist.

Syntax:

document.getElementById("gfg");

Where "gfg" is the ID assigned to the "Datalist" Tag.

Collections:

options: It is used to return the number of options in an <datalist> element.

Example 1: In this example, we will use DOM Datalist Object

HTML

<!DOCTYPE html>
<html>
  
<body>
    <h1 style="color:green;font-size:39px;">
        GeeksForGeeks
    </h1>
    <h2>DOM Datalist object</h2>
    <form>
        <label>Your Cars Name: </label>
        <input list="gfg">
        <datalist id="gfg">
            <option value="BMW" >
            <option value="Bentley" >
            <option value="Mercedes" >
            <option value="Audi" >
            <option value="Volkswagen" >
        </datalist>
    </form>
    <br>
    <button onclick="myGeeks()">Submit</button>
    <p id="sudo"></p>
    <script>
        function myGeeks() {
            let g =
                document.getElementById("gfg").options.length;
            document.getElementById("sudo").innerHTML =
                "There are " + g + " options in the list.";
        }
    </script>
</body>
</html>

Output:

Example 2: In this example, we will HTML DOM Datalist Object.

HTML

<!DOCTYPE html>
<html>

<body>
    <h1 style="color:green;font-size:39px;">
        GeeksForGeeks
    </h1>
    <h2>DOM Datalist object</h2>
    <form id="GFG">
        <b><label>Your cars name:</label></b>
    </form>
    <br>
    <button onclick="myGeeks()">Submit</button>
    <script>
        function myGeeks() {
            let g = document.createElement("INPUT");
            g.setAttribute("list", "cars");
            document.getElementById("GFG").appendChild(g);

            let f = document.createElement("DATALIST");
            f.setAttribute("id", "cars");
            document.getElementById("GFG").appendChild(f);

            let w = document.createElement("OPTION");
            w.setAttribute("value", "BMW");
            document.getElementById("cars").appendChild(w);

            let x = document.createElement("OPTION");
            x.setAttribute("value", "Mercedes");
            document.getElementById("cars").appendChild(x);
        }
    </script>
</body>
</html>