010 Final Source Code Image Carousel

<html>

<head>
    <title>JavaScript</title>
    <style>
        .mySlides {
            display: none;
        }
        
        .slideContainer {
            width: 80%;
            height: 60%;
            position: relative;
            margin: auto;
            overflow: hidden;
        }
        
        .slideContainer img {
            width: 100%;
            height: 100%;
        }
        
        .dot {
            height: 25px;
            width: 25px;
            margin: 2px;
            background-color: #ccc;
            border-radius: 50%;
            display: inline-block;
            cursor: pointer;
        }
        
        .indicator {
            margin-top: 10px;
            text-align: center;
            width: 100%;
        }
        
        .caption {
            color: #f3f3f3;
            font-size: 0.8em;
            padding: 10px;
            position: absolute;
            bottom: 2px;
            width: 100%;
            text-align: center;
        }
        
        .active {
            background-color: #666;
        }
    </style>
</head>

<body>
    <div class="slideContainer"></div>
    <div class="indicator"></div>
    <script>
        let slideIndex = 0;
        let timer;
        const myImages = [
            {
                "img": "https://via.placeholder.com/250/09f?text=image1"
                , "caption": "Hello World Image 1"
        }
            , {
                "img": "https://via.placeholder.com/250/e4e?text=image2"
                , "caption": "Hello World Image 2"
        }
            , {
                "img": "https://via.placeholder.com/250/1f1?text=image3"
                , "caption": "Hello World Image 3"
        }
     ];
        builder();

        function builder() {
            for (let x = 0; x < myImages.length; x++) {
                let slide = document.createElement("div");
                slide.setAttribute("class", "mySlide fade");
                let img = document.createElement("img");
                img.setAttribute("src", myImages[x].img);
                let cap = document.createElement("div");
                cap.classList.add("caption");
                cap.innerText = myImages[x].caption;
                slide.appendChild(img);
                slide.appendChild(cap);
                document.querySelector(".slideContainer").appendChild(slide);
                let span = document.createElement("span");
                span.classList.add("dot");
                span.addEventListener("click", function () {
                    moveSlide(x);
                })
                document.querySelector(".indicator").appendChild(span);
            }
            playSlides();
        }

        function playSlides() {
            const slides = document.querySelectorAll(".mySlide");
            const dots = document.querySelectorAll(".dot");
            const active = document.querySelector(".active");
            if (active != null) {
                active.classList.remove("active");
            }
            if (slideIndex + 1 > slides.length) {
                slideIndex = 0;
            }
            slides.forEach(function (el) {
                el.style.display = "none";
            })
            slides[slideIndex].style.display = "block";
            dots[slideIndex].classList.add("active");
            slideIndex++;
            timer = setTimeout(playSlides, 3000);
        }

        function moveSlide(num) {
            slideIndex = num;
            clearTimeout(timer);
            playSlides();
        }
    </script>
</body>

</html>