Javascript Reference - HTML DOM Datalist Object

The Datalist class represents an HTML <datalist> element.

Datalist Object Collections

Collection	Description
options	Returns all the options in a datalist

Standard Properties and Events

The Datalist object supports the standard properties and events.

Example

The following code shows how to get access a <datalist> element by using getElementById()


<!DOCTYPE html>
<html>
<body>
<form>
  <input list="myDatalist"> 
  <datalist id="myDatalist"> 
    <option value="A">
    <option value="B">
    <option value="C">
    <option value="D">
    <option value="E">
  </datalist>
</form><!--from w  ww.ja v a  2s  .  c o  m-->
<button onclick="myFunction()">test</button>
<p id="demo"></p>
<script>
function myFunction() {
    var x = document.getElementById("myDatalist").options.length;
    document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>

The code above is rendered as follows:

Example 2

The following code shows how to create a <datalist> element by using the document.createElement() method.


<!DOCTYPE html>
<html>
<body>
<form id="myForm">
</form><!--  ww  w. j a v a 2 s.  co  m-->
<button onclick="myFunction()">test</button>
<script>
function myFunction() {
    var x = document.createElement("INPUT");
    x.setAttribute("list", "myList");
    document.getElementById("myForm").appendChild(x);

    var y = document.createElement("DATALIST");
    y.setAttribute("id", "myList");
    document.getElementById("myForm").appendChild(y);

    var z = document.createElement("OPTION");
    z.setAttribute("value", "A");
    document.getElementById("myList").appendChild(z);
}
</script>

</body>
</html>

The code above is rendered as follows: