CAROUSEL

HTML

<div id="slider-wrap">
    <ul id="slider">
        <li>
            <div>
                <h3>Slide #1</h3>
                <span>Sub-title #1</span>
            </div>
            <img src="https://fakeimg.pl/350x200/960a96/000?text=11111">
        </li>

        <li>
            <div>
                <h3>Slide #2</h3>
                <span>Sub-title #2</span>
            </div>
            <img src="https://fakeimg.pl/350x200/D27328/000?text=22222">
        </li>

        <li>
            <div>
                <h3>Slide #3</h3>
                <span>Sub-title #3</span>
            </div>
            <img src="https://fakeimg.pl/350x200/FF607F/000?text=33333">
        </li>

        <li>
            <div>
                <h3>Slide #4</h3>
                <span>Sub-title #4</span>
            </div>
            <img src="https://fakeimg.pl/350x200/0A6E0A/000?text=44444">
        </li>

        <li>
            <div>
                <h3>Slide #5</h3>
                <span>Sub-title #5</span>
            </div>
            <img src="https://fakeimg.pl/350x200/0064CD/000?text=55555">
        </li>
    </ul>

    <div class="slider-btns" id="next"><span>▶</span></div>
    <div class="slider-btns" id="previous"><span>◀</span></div>

    <div id="slider-pagination-wrap">
        <ul>
        </ul>
    </div>
</div>
    

CSS

/*GLOBALS*/
* {
    margin: 0;
    padding: 0;
    list-style: none;
}

#slider-wrap {
    width: 100%;
    height: 400px;
    position: relative;
    overflow: hidden;
}

#slider-wrap ul#slider {
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

#slider-wrap ul#slider li {
    float: left;
    position: relative;
    width: 600px;
    height: 400px;
}

#slider-wrap ul#slider li>div {
    position: absolute;
    top: 20px;
    left: 35px;
}

#slider-wrap ul#slider li>div h3 {
    font-size: 36px;
    text-transform: uppercase;
}

#slider-wrap ul#slider li>div span {
    font-size: 21px;
}

#slider-wrap ul#slider li img {
    display: block;
    width: 100%;
    height: 100%;
}

/*btns*/
.slider-btns {
    position: absolute;
    width: 50px;
    height: 60px;
    top: 50%;
    margin-top: -25px;
    line-height: 57px;
    text-align: center;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.1);
    z-index: 100;
    -webkit-user-select: none;
    -moz-user-select: none;
    -khtml-user-select: none;
    -ms-user-select: none;
    -webkit-transition: all 0.1s ease;
    -o-transition: all 0.1s ease;
    transition: all 0.1s ease;
}

.slider-btns:hover {
    background: rgba(0, 0, 0, 0.3);
}

#next {
    right: -50px;
    border-radius: 7px 0px 0px 7px;
    color: #eee;
}

#previous {
    left: -50px;
    border-radius: 0px 7px 7px 7px;
    color: #eee;
}

#slider-wrap.active #next {
    right: 0px;
}

#slider-wrap.active #previous {
    left: 0px;
}

/*bar*/
#slider-pagination-wrap {
    min-width: 20px;
    margin-top: 350px;
    margin-left: auto;
    margin-right: auto;
    height: 15px;
    position: relative;
    text-align: center;
}

#slider-pagination-wrap ul {
    width: 100%;
}

#slider-pagination-wrap ul li {
    margin: 0 4px;
    display: inline-block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #fff;
    opacity: 0.5;
    position: relative;
    top: 0;
}

#slider-pagination-wrap ul li.active {
    width: 12px;
    height: 12px;
    top: 3px;
    opacity: 1;
    -webkit-box-shadow: rgba(0, 0, 0, 0.1) 1px 1px 0px;
    box-shadow: rgba(0, 0, 0, 0.1) 1px 1px 0px;
}

/*ANIMATION*/
#slider-wrap ul,
#slider-pagination-wrap ul li {
    -webkit-transition: all 0.3s cubic-bezier(1, .01, .32, 1);
    -o-transition: all 0.3s cubic-bezier(1, .01, .32, 1);
    transition: all 0.3s cubic-bezier(1, .01, .32, 1);
}
    

JavaScript

//slide-wrap
var slideWrapper = document.getElementById('slider-wrap');
//current slideIndexition
var slideIndex = 0;
//items
var slides = document.querySelectorAll('#slider-wrap ul li');
//number of slides
var totalSlides = slides.length;
//get the slide width
var sliderWidth = slideWrapper.clientWidth;
//set width of items
slides.forEach(function (element) {
    element.style.width = sliderWidth + 'px';
})
//set width to be 'x' times the number of slides
var slider = document.querySelector('#slider-wrap ul#slider');
slider.style.width = sliderWidth * totalSlides + 'px';

// next, prev
var nextBtn = document.getElementById('next');
var prevBtn = document.getElementById('previous');
nextBtn.addEventListener('click', function () {
    plusSlides(1);
});
prevBtn.addEventListener('click', function () {
    plusSlides(-1);
});

// hover
slideWrapper.addEventListener('mouseover', function () {
    this.classList.add('active');
    clearInterval(autoSlider);
});
slideWrapper.addEventListener('mouseleave', function () {
    this.classList.remove('active');
    autoSlider = setInterval(function () {
        plusSlides(1);
    }, 3000);
});


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

function currentSlides(n) {
    showSlides(slideIndex = n);
}

function showSlides(n) {
    slideIndex = n;
    if (slideIndex == -1) {
        slideIndex = totalSlides - 1;
    } else if (slideIndex === totalSlides) {
        slideIndex = 0;
    }

    slider.style.left = -(sliderWidth * slideIndex) + 'px';
    pagination();
}

//pagination
slides.forEach(function () {
    var li = document.createElement('li');
    document.querySelector('#slider-pagination-wrap ul').appendChild(li);
})

function pagination() {
    var dots = document.querySelectorAll('#slider-pagination-wrap ul li');
    dots.forEach(function (element) {
        element.classList.remove('active');
    });
    dots[slideIndex].classList.add('active');
}

pagination();
var autoSlider = setInterval(function () {
    plusSlides(1);
}, 3000);