JavaScript: Remove items from a dropdown list

Last update on April 13 2024 13:25:42 (UTC/GMT +8 hours)

JavaScript DOM: Exercise-8 with Solution

Write a JavaScript program to remove items from a drop-down list.

Sample HTML file:


<!DOCTYPE html>
<html><head>
<meta charset=utf-8 />
<title>Remove items from a dropdown list</title>
</head><body><form>
<select id="colorSelect">
<option>Red</option>
<option>Green</option>
<option>White</option>
<option>Black</option>
</select>
<input type="button" onclick="removecolor()" value="Select and Remove">
</form></body></html>

Sample Solution:

HTML Code:

<!-- Declaration of HTML document type -->
<!DOCTYPE html> 
<!-- Start of HTML document -->
<html> 
<!-- Start of head section -->
<head> 
<!-- Internal CSS styling -->
<style type="text/css"> 
    /* Styling body to have margin of 30px */
    body {margin: 30px;} 
</style>  
<!-- Declaring character encoding -->
<meta charset=utf-8 /> 
<!-- Setting title of the document -->
<title>Remove items from a dropdown list</title> 
<!-- End of head section -->
</head>
<!-- Start of body section -->
<body>
<!-- Form element containing a dropdown list -->
<form> 
<select id="colorSelect"> 
    <!-- Options in the dropdown list -->
    <option>Red</option> 
    <option>Green</option> 
    <option>White</option> 
    <option>Black</option> 
</select> 
<!-- Button triggering the removecolor function on click -->
<input type="button" onclick="removecolor()" value="Select and Remove"> 
</form>
<!-- End of body section -->
</body>
<!-- End of HTML document -->
</html>

JavaScript Code:

// Function declaration for removecolor
function removecolor()
{
    // Getting reference to the dropdown select element
    var x=document.getElementById("colorSelect");
    // Removing the option at the selected index
    x.remove(x.selectedIndex);
}

Output:

Flowchart:

Live Demo:

See the Pen javascript-dom-exercise-8 by w3resource (@w3resource) on CodePen.

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