Automatic slideshow with button

Basic without auto sliding

How To Create a Slideshow

Basic auto sliding

W3Schools online HTML editor

let slideIndex = 1;
showSlides(slideIndex);

// Next/previous controls
function plusSlides(n) {
  showSlides(slideIndex += n);
}

// Thumbnail image controls
function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  let i;
  let slides = document.getElementsByClassName("mySlides");
  let dots = document.getElementsByClassName("dot");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  **slides[slideIndex-1].style.display = "block";
  dots[slideIndex-1].className += " active";**
}

var slideIndex = 0;
showSlides();
var slides,dots;

function showSlides() {
    var i;
    slides = document.getElementsByClassName("mySlides");
    dots = document.getElementsByClassName("dot");
    for (i = 0; i < slides.length; i++) {
       slides[i].style.display = "none";  
    }
    slideIndex++;
    if (slideIndex> slides.length) {slideIndex = 1}    
    for (i = 0; i < dots.length; i++) {
        dots[i].className = dots[i].className.replace(" active", "");
    }
    slides[slideIndex-1].style.display = "block";  
    dots[slideIndex-1].className += " active";
    **setTimeout(showSlides, 8000);** // Change image every 8 seconds
}

function **plusSlides**(position) {
    **slideIndex +=position;**
    *if (slideIndex> slides.length) {slideIndex = 1}
    else if(slideIndex<1){slideIndex = slides.length}
    for (i = 0; i < slides.length; i++) {
       slides[i].style.display = "none";  
    }
    for (i = 0; i < dots.length; i++) {
        dots[i].className = dots[i].className.replace(" active", "");
    }
    slides[slideIndex-1].style.display = "block";  
    dots[slideIndex-1].className += " active";*
}

function **currentSlide**(index) {
    *if (index> slides.length) {index = 1}
    else if(index<1){index = slides.length}
    for (i = 0; i < slides.length; i++) {
       slides[i].style.display = "none";  
    }
    for (i = 0; i < dots.length; i++) {
        dots[i].className = dots[i].className.replace(" active", "");
    }
    **slides[index-1].style.display = "block";  
    dots[index-1].className += " active";***
}