Creating a Carousel Feature 1

In this lesson, we will create carousel functionality using JavaScript.

Copy
let slideIndex = 1;

showSlides(slideIndex);

Before diving into building the carousel's functionality, we need to perform some initial setup.

First, declare a variable named slideIndex to store the index of the currently displayed slide.

Initially, set the value of slideIndex to 1, so the first slide is displayed.

Then, call the showSlides function.

Pass the value of slideIndex as an argument.

This function is responsible for displaying the slides, and the slide shown depends on the argument's value.

Since the value of slideIndex is 1 here, the first slide is displayed.

Copy
<a class="prev" onclick="plusSlides(-1)">&#10094;</a>
<a class="next" onclick="plusSlides(1)">&#10095;</a>

While setting up the carousel structure, we created previous and next buttons.

Now, we need to ensure that clicking these buttons results in slide transitions.

Copy
function plusSlides(n) {
    showSlides(slideIndex += n);
}

The previously mentioned showSlides function was designed to change the displayed slide based on its argument.

We implemented the plusSlides function as a way to call the showSlides function.

When invoking showSlides, we adjust the slideIndex by n before passing it.

Thus, if n is 1, the value of slideIndex increases by 1; if it's -1, the value decreases by 1.

In this manner, slides transition as the value of slideIndex changes.