如何自动播放w3school javascript报价幻灯片？

Question

I am trying to autoplay this javascript slider but i am not able to do this.How to autoplay w3school javascript Quotes Slideshow ? 我正在尝试自动播放此javascript滑块，但无法执行此操作。如何自动播放w3school javascript报价幻灯片？

<script>
var slideIndex = 1;
showSlides(slideIndex);

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

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

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides_nws");
  var 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";
}
</script>

Answer 1

use setInterval function for auto slide, use the below code in your javascript 使用setInterval函数进行自动滑动，请在JavaScript中使用以下代码

window.onload= function () {
 setInterval(function(){ 
     plusSlides(1);
 }, 3000);
 }

 var slideIndex = 1; showSlides(slideIndex); function plusSlides(n) { showSlides(slideIndex += n); } function currentSlide(n) { showSlides(slideIndex = n); } function showSlides(n) { var i; var slides = document.getElementsByClassName("mySlides"); var 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"; } window.onload= function () { setInterval(function(){ plusSlides(1); }, 3000); }

 * {box-sizing: border-box} body {font-family: Verdana, sans-serif; margin:0} /* Slideshow container */ .slideshow-container { position: relative; background: #f1f1f1f1; } /* Slides */ .mySlides { display: none; padding: 80px; text-align: center; } /* Next & previous buttons */ .prev, .next { cursor: pointer; position: absolute; top: 50%; width: auto; margin-top: -30px; padding: 16px; color: #888; font-weight: bold; font-size: 20px; border-radius: 0 3px 3px 0; user-select: none; } /* Position the "next button" to the right */ .next { position: absolute; right: 0; border-radius: 3px 0 0 3px; } /* On hover, add a black background color with a little bit see-through */ .prev:hover, .next:hover { background-color: rgba(0,0,0,0.8); color: white; } /* The dot/bullet/indicator container */ .dot-container { text-align: center; padding: 20px; background: #ddd; } /* The dots/bullets/indicators */ .dot { cursor: pointer; height: 15px; width: 15px; margin: 0 2px; background-color: #bbb; border-radius: 50%; display: inline-block; transition: background-color 0.6s ease; } /* Add a background color to the active dot/circle */ .active, .dot:hover { background-color: #717171; } /* Add an italic font style to all quotes */ q {font-style: italic;} /* Add a blue color to the author */ .author {color: cornflowerblue;}

 <body> <div class="slideshow-container"> <div class="mySlides"> <q>I love you the more in that I believe you had liked me for my own sake and for nothing else</q> <p class="author">- John Keats</p> </div> <div class="mySlides"> <q>But man is not made for defeat. A man can be destroyed but not defeated.</q> <p class="author">- Ernest Hemingway</p> </div> <div class="mySlides"> <q>I have not failed. I've just found 10,000 ways that won't work.</q> <p class="author">- Thomas A. Edison</p> </div> <a class="prev" onclick="plusSlides(-1)">❮</a> <a class="next" onclick="plusSlides(1)">❯</a> </div> <div class="dot-container"> <span class="dot" onclick="currentSlide(1)"></span> <span class="dot" onclick="currentSlide(2)"></span> <span class="dot" onclick="currentSlide(3)"></span> </div> </body>

如何自动播放w3school javascript报价幻灯片？

问题描述

1 个解决方案

解决方案1
0 已采纳 2019-05-07 09:40:29

如何自动播放w3school javascript报价幻灯片？

问题描述

1 个解决方案

解决方案1 0 已采纳 2019-05-07 09:40:29

解决方案1
0 已采纳 2019-05-07 09:40:29