Table of Contents:
- Handling the Add to Wishlist Button
- Selecting Elements with querySelector
- Adding an Item to the Wishlist
- Removing an Item from the Wishlist
- Handling the Click Event
- Adding and Removing the "active" Class
- Testing the Functionality
- Final Thoughts
Handling the Add to Wishlist Button
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
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