Chia sẻ code Slidder chuyển hình ảnh tự động - Sử dụng cả 3 CSS, HTML, JS

Hướng dẫn các thực hiện.

<b:if cond='data:view.isHomepage'> </b:if>

+ Bước 1: Copy CSS

.mySlides{display:none}
.mySlides img {vertical-align:middle;width:100%}
.wrap-dot{text-align:center;margin-top:10px}
.slideshow-container{max-width:1000px;position:relative;margin:auto}
.slideshow-container .prev,.slideshow-container .next{cursor:pointer;position:absolute;top:50%;padding:7px 15px;margin:-22px 5px 0 5px;color:white;font-weight:bold;font-size:18px;transition:0.6s ease;border-radius:50%;user-select:none}
.slideshow-container .next{right:0}
.slideshow-container .prev:hover,.slideshow-container .next:hover{background-color:rgba(0,0,0,0.8)}
.slideshow-container .text{color:#f2f2f2;font-size:15px;padding:8px 12px;position:absolute;bottom:8px;width:100%;text-align:center}
.wrap-dot .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}
.wrap-dot .dot.active{background-color:#f89000;width:30px;border-radius:20px}
.fade{-webkit-animation-name:fade;-webkit-animation-duration:1.5s;animation-name:fade;animation-duration:1.5s}
@-webkit-keyframes fade{from{opacity:.4}to{opacity:1}}@keyframes fade{from{opacity:.4}to{opacity:1}}
@media only screen and (max-width:300px){.slideshow-container .prev,.slideshow-container .next,.slideshow-container .text{font-size:11px}}

+ Bước 2: Copy HTML

<div class='slideshow-container'>
<div class='mySlides fade'>
  <a href='#'>
  <img src='https://www.w3schools.com/howto/img_snow_wide.jpg'/>
  <div class='text'>Caption Text</div>
  </a>
</div>

<div class='mySlides fade'>
  <a href='#'>
  <img src='https://www.w3schools.com/howto/img_mountains_wide.jpg'/>
  <div class='text'>Caption Two</div>
  </a>
</div>

<div class='mySlides fade'>
  <a href='#'>
  <img src='https://www.w3schools.com/howto/img_nature_wide.jpg'/>
  <div class='text'>Caption Three</div>
  </a>
</div>
<a class='prev' onclick='prevSlide()'>&#10094;</a>
<a class='next' onclick='showSlides()'>&#10095;</a>
</div>

<div class='wrap-dot'>
  <span class='dot'></span>
  <span class='dot'></span>
  <span class='dot'></span>
</div>

+ Bước 3: Copy JS

<script>/*<![CDATA[*/ 
var timeOut = 2e3,
    slideIndex = 0,
    autoOn = !0;

function autoSlides() {
    timeOut -= 20, 1 == autoOn && timeOut < 0 && showSlides(), setTimeout(autoSlides, 20)
}

function prevSlide() {
    timeOut = 2e3;
    var e = document.getElementsByClassName("mySlides"),
        s = document.getElementsByClassName("dot");
    for (i = 0; i < e.length; i++) e[i].style.display = "none", s[i].className = s[i].className.replace(" active", "");
    --slideIndex > e.length && (slideIndex = 1), 0 == slideIndex && (slideIndex = 3), e[slideIndex - 1].style.display = "block", s[slideIndex - 1].className += " active"
}

function showSlides() {
    timeOut = 2e3;
    var e = document.getElementsByClassName("mySlides"),
        s = document.getElementsByClassName("dot");
    for (i = 0; i < e.length; i++) e[i].style.display = "none", s[i].className = s[i].className.replace(" active", "");
    ++slideIndex > e.length && (slideIndex = 1), e[slideIndex - 1].style.display = "block", s[slideIndex - 1].className += " active"
}
autoSlides();
/*]]>*/</script>