Create a Wishlist Button with Pure JavaScript

Create a Wishlist Button with Pure JavaScript

Table of Contents:

1. Introduction
2. Handling the Add to Wishlist Button
3. Writing Pure JavaScript
4. Selecting Elements with querySelector
5. Adding an Item to the Wishlist
6. Removing an Item from the Wishlist
7. Handling the Click Event
8. Adding and Removing the "active" Class
9. Testing the Functionality
10. Final Thoughts

Handling the Add to Wishlist Button

In this article, we will explore how to handle the add to wishlist button using JavaScript. We will write pure JavaScript code without relying on jQuery, so if you are familiar with jQuery, be prepared for some differences. We will start by selecting elements with querySelector, then move on to adding and removing items from the wishlist. Lastly, we will handle the click event and add or remove the "active" class accordingly. Let's get started!

Introduction

In this video tutorial, we will be learning how to handle the add to wishlist button using JavaScript. Our goal is to send a request to the server when the button is clicked and save the data. We will be writing pure JavaScript code without using jQuery, so if you're used to working with jQuery, this might be a bit different for you. Let's dive into the code!

Writing Pure JavaScript

To handle the add to wishlist button, we need to write some pure JavaScript code. We will start by creating a function called "addWishlist" that will add an item to the wishlist. This function does not accept any parameters and will add or cancel adding an item to the wishlist. Next, we will write another function called "removeWishlist" that will remove an item from the wishlist. These functions will serve as the core functionality for adding and removing items from the wishlist.

Selecting Elements with querySelector

Before we can handle the click event, we need to select the add to wishlist button using the querySelector method. We will assign the selected button to a variable called "wishlistButton" using the document.querySelector method. This will allow us to target the button and attach the click event listener to it. We will be using the class name "codingaspirewishlist" to select the button.

Adding an Item to the Wishlist

Now that we have selected the add to wishlist button, we can handle the click event and add an item to the wishlist. We will use the addEventListener method to listen for the click event on the wishlistButton. When the button is clicked, the event listener will execute the anonymous function, which will call the addWishlist function. The addWishlist function will then add the item to the wishlist.

Removing an Item from the Wishlist

To handle the case when the button is clicked again, we need to implement the functionality to remove an item from the wishlist. Currently, clicking the button repeatedly will keep adding items to the wishlist. To solve this, we will add a condition in the addEventListener function to check if the item is already in the wishlist. If it is, we will call the removeWishlist function instead of adding the item again. This will ensure that the wishlist remains updated and prevents duplicate items.

Handling the Click Event

When the add to wishlist button is clicked, the click event will trigger the event listener function. Inside this function, we will log the button that was clicked to the console using console.log(). This will help us verify that the function is being executed correctly. We will also add the functionality to call the addWishlist function when the button is clicked.

Adding and Removing the "active" Class

To indicate whether an item is in the wishlist or not, we will add a CSS class called "active" to the add to wishlist button. This will visually change the button's appearance, such as filling an icon or changing its color. When the button is clicked and the item is added to the wishlist, we will use the classList.add() method to add the "active" class to the button. Conversely, when the item is removed from the wishlist, we will use the classList.remove() method to remove the "active" class from the button.

Testing the Functionality

To ensure that our code is functioning as expected, we need to test the add to wishlist functionality. We will click on the add to wishlist button and check if the item is successfully added to the wishlist. We will then click on the button again to see if the item is removed from the wishlist. This testing process will help us ensure that our JavaScript code is working correctly.

Final Thoughts

In this article, we have learned how to handle the add to wishlist button using pure JavaScript. We started by selecting the button with querySelector and then implemented the functionality to add and remove items from the wishlist. By handling the click event and adding/removing the "active" class, we created an interactive wishlist feature. Remember to test your code thoroughly and feel free to modify it to suit your own needs. Happy coding!