September 25, 2021

How to Remove Element in Javascript

By Krishnaa JavaScript Questions 0 Comments

In this tutorial, you will learn how to remove element in javascript. This is something that comes under DOM manipulation and is one of the skills that you must have if you want to be a good javascript developer.

Every element in javascript has a parent element and if you have access to the parent element, then you can make use of removeChild() method to remove any child element. This method works great if you want to remove a specific child element, but what if you want to get rid of all the child elements in one go. In such a scenario, you can make use of the innerHTML property and set it to an empty string.

We will cover both of the methods mentioned above in this tutorial. In the following example, we have a bunch of li elements and upon click of a button, we will remove all of them. Please have a look over the code example and the steps given below.

HTML & CSS

We have 4 elements in the HTML file (div, button, ul, and li). The div element is just a wrapper for the rest of the elements.
The inner text for the button element is “Remove”.
We have a bunch of fruit names in the ul element.
We have done some basic styling using CSS and added the link to our style.css stylesheet inside the head element.
We have also included our javascript file script.js with a script tag at the bottom.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="style.css">
    <title>Document</title>
</head>
<body>
    
    <div>
        <button>Remove</button>
        <ul>
            <li>Mango</li>
            <li>Grapes</li>
            <li>Kiwi</li>
            <li>Apple</li>
        </ul>               
    </div>

    <script src="script.js"></script>
</body>
</html>

div {
    width: 250px;
    margin: auto;
}

button{
    margin-left: 20px;
}

li{
    font-size: 20px;
}

Javascript

We have selected 2 elements button and ul using the document.querySelector() method and stored them in btnRemove and parent variables respectively.
We have selected all the li elements using the document.querySelectorAll() method and stored them in fruits variable.
We have attached the click event listener to the button element.
In the event handler function, we are looping through all the li elements using for loop. Inside the loop, we are calling the removeChild() method of the ul element and passing each li element as a parameter. This is the first way of removing all the li elements.
The second way of removing all the li elements is to use the innerHTML property of the ul element and set it to an empty string.

let btnRemove = document.querySelector('button');
let parent = document.querySelector('ul');
let fruits = document.querySelectorAll('li');

btnRemove.addEventListener('click', () => {
   /*  for(fruit of fruits){
        parent.removeChild(fruit);
    } */

    parent.innerHTML = '';
});

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