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JavaScript code for adding new elements in a dynamic way

  • Last Updated : 21 Sep, 2021

Javascript is a very important language when it comes to learning how the browser works. Often there are times we would like to add dynamic elements/content to our web pages. This post deals with all of that.

Creation of new element: New elements can be created in JS by using the createElement() method.  

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// Where <tagName> can be any HTML 
// tagName like div, ul, button, etc.

// newDiv element has been created
For Eg: let newDiv = document.createElement("div");

Once the element has been created, let’s move on to the setting of attributes of the newly created element.


Setting the attributes of the created element: Attributes can be set using setAttribute() method.  

The syntax and example are as follows:

Element.setAttribute(name, value);
// Where Element is the name of web element. 
// Here, we have created newDiv.
// Where name is the attribute name and 
// value is the value that needs to be set

For Eg: newDiv.setAttribute("class","container");

Example: Elements can be created based on some event like a click. Here’s an example of how to create elements dynamically with an onclick event. This code can be further made into a todo-list!


<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content=
        "width=device-width, initial-scale=1.0">
        body {
            height: 100%;
            width: 100%;
        .button {
            display: flex;
            align-items: center;
            justify-content: center;
        .tasks {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
            margin-top: 20px;
    <div class="button">
        <button id="addTask">Add task</button>
    <div class="tasks"></div>
    <script type="text/javascript">
        // Getting the parent element in which
        // the new div will be created
        let task = document.getElementsByClassName("tasks");
        // Getting the addTask button element
        let addTask = document.getElementById("addTask");
        // Adding onclick event to the button
        addTask.addEventListener('click', function () {
            // Traversing through collection of HTML
            // elements (tasks here)
            for (let i = 0; i < task.length; i++) {
                // New div element is created  
                let newDiv = document.createElement("div");
                // Setting the attribute of class type to newDiv 
                newDiv.setAttribute("class", "list");
                // innerText used to write the text in newDiv 
                newDiv.innerText = "New Div created";
                // Finally append the newDiv to the
                // parent i.e. tasks   


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