jquery - 如何让幻灯片上的三个点可点击以显示相应的幻灯片？

Question

如何让幻灯片上的三个点可点击以显示相应的幻灯片？

我希望旋转木马底部的三个点可以点击，以便显示相应的幻灯片。我如何使用 jQuery 实现此目的？

有人建议获取当前幻灯片的索引，然后使用索引将类应用于正确的点...但我不确定如何去做。

http://slideshow-test-22.superhi.com/

var currentSlide = 0
var totalSlides = $('.holder div.slide').length

var moveSlide = function(slide) {
  var leftPosition = -(slide * 100) + 'vw'
  $('.holder').css('left', leftPosition)
}

// Next Slide Function
var nextSlide = function() {
  currentSlide = currentSlide + 1
  if (currentSlide >= totalSlides) {
    currentSlide = 0
  }
  moveSlide(currentSlide)
}

// Previous Slide Function
var previousSlide = function() {
  currentSlide = currentSlide - 1
  if (currentSlide < 0) {
    currentSlide = totalSlides - 1
  }
  moveSlide(currentSlide)
}

// Auto Slide Function
var autoSlide = setInterval(function() {
  nextSlide()
}, 5000)

// Arrows Function
$('.next').on('click', function() {
  clearInterval(autoSlide)
  nextSlide()
})

$('.prev').on('click', function() {
  clearInterval(autoSlide)
  previousSlide()
})

/* Base Carousel Styling */

.slideshow {
  position: relative;
  overflow: hidden;
  width: 100vw;
  height: 550px;
}

.holder {
  position: relative;
  top: 0;
  left: 0;
  width: 10000vw;
  height: 550px;
  transition: left 2s;
}

.holder div.slide {
  float: left;
  width: 100vw;
  height: 550px;
}

.slide {
  background-color: #f1f1f2;
  position: relative;
}

a.prev,
a.next {
  color: #eee;
  text-decoration: none;
  font-size: 30px;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  padding: 20px;
}

.prev {
  left: 10px;
}

.next {
  right: 10px;
}


/* End Of Base Carousel Styling */


/*Slide Styling*/

.slide {
  background-repeat: no-repeat;
  background-size: cover;
}


/*Slide Copy + CTA Styling*/

h1 {
  font-family: Oswald;
  font-size: 60px;
  line-height: 1.2;
  text-transform: uppercase;
  color: white;
}


/*  p{
	        font-family: Open Sans;
	        font-size:18px;
	        line-height: 1.2;
	         text-transform: capitalize;
}

 a.cta{
	        font-family: Open Sans;
	        font-size:12px;
	        line-height: 1.2;
	        padding:16px 8px;
	        text-transform: uppercase;
} */

.copy-cta-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}


/*Slide One Styling*/

.slide-1 {
  background-color: #101820;
}

.slide-2 {
  background-color: #283c50;
}

.slide-3 {
  background-color: #426385;
}


/* The dots/bullets/indicators */

.carousel-dots {
  position: absolute;
  bottom: 10px;
  width: 100%;
  text-align: center;
}

.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #fff;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active,
.dot:hover {
  background-color: #717171;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<div class="slideshow">
  <div class="holder">
    <div class="slide-1 slide">
      <div class="copy-cta-container">
        <h1>Slide 1</h1>
      </div>
    </div>
    <div class="slide-2 slide">
      <div class="copy-cta-container">
        <h1>Slide 2</h1>
      </div>
    </div>
    <div class="slide-3 slide">
      <div class="copy-cta-container">
        <h1>Slide 3</h1>
      </div>
    </div>
  </div>
  <a href="#" class="prev">&lt;</a>
  <a href="#" class="next">&gt;</a>
  <section class="carousel-dots">
    <span class="dot" onclick="currentSlide(1)"></span>
    <span class="dot" onclick="currentSlide(2)"></span>
    <span class="dot" onclick="currentSlide(3)"></span>
  </section>
</div>

Answer 1

您可以使用现有的 moveSlide() 函数来更改事件幻灯片。您需要做的就是将单击的 .dot 元素的索引关联到幻灯片，这可以通过获取其 index() 来完成。试试这个:

$('.dot').click(function() {
  currentSlide = $(this).index();
  moveSlide(currentSlide);
});

完整示例:

var currentSlide = 0
var totalSlides = $('.holder div.slide').length

$('.dot').click(function() {
  currentSlide = $(this).index();
  moveSlide(currentSlide);
});

var moveSlide = function(slide) {
  var leftPosition = -(slide * 100) + 'vw'
  $('.holder').css('left', leftPosition)
}

// Next Slide Function
var nextSlide = function() {
  currentSlide = currentSlide + 1
  if (currentSlide >= totalSlides) {
    currentSlide = 0
  }
  moveSlide(currentSlide)
}

// Previous Slide Function
var previousSlide = function() {
  currentSlide = currentSlide - 1
  if (currentSlide < 0) {
    currentSlide = totalSlides - 1
  }
  moveSlide(currentSlide)
}

// Auto Slide Function
var autoSlide = setInterval(function() {
  nextSlide()
}, 5000)

// Arrows Function
$('.next').on('click', function() {
  clearInterval(autoSlide)
  nextSlide()
})

$('.prev').on('click', function() {
  clearInterval(autoSlide)
  previousSlide()
})

/* Base Carousel Styling */

.slideshow {
  position: relative;
  overflow: hidden;
  width: 100vw;
  height: 550px;
}

.holder {
  position: relative;
  top: 0;
  left: 0;
  width: 10000vw;
  height: 550px;
  transition: left 2s;
}

.holder div.slide {
  float: left;
  width: 100vw;
  height: 550px;
}

.slide {
  background-color: #f1f1f2;
  position: relative;
}

a.prev,
a.next {
  color: #eee;
  text-decoration: none;
  font-size: 30px;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  padding: 20px;
}

.prev {
  left: 10px;
}

.next {
  right: 10px;
}


/* End Of Base Carousel Styling */


/*Slide Styling*/

.slide {
  background-repeat: no-repeat;
  background-size: cover;
}


/*Slide Copy + CTA Styling*/

h1 {
  font-family: Oswald;
  font-size: 60px;
  line-height: 1.2;
  text-transform: uppercase;
  color: white;
}


/*  p{
	        font-family: Open Sans;
	        font-size:18px;
	        line-height: 1.2;
	         text-transform: capitalize;
}

 a.cta{
	        font-family: Open Sans;
	        font-size:12px;
	        line-height: 1.2;
	        padding:16px 8px;
	        text-transform: uppercase;
} */

.copy-cta-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}


/*Slide One Styling*/

.slide-1 {
  background-color: #101820;
}

.slide-2 {
  background-color: #283c50;
}

.slide-3 {
  background-color: #426385;
}


/* The dots/bullets/indicators */

.carousel-dots {
  position: absolute;
  bottom: 10px;
  width: 100%;
  text-align: center;
}

.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #fff;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active,
.dot:hover {
  background-color: #717171;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<div class="slideshow">
  <div class="holder">
    <div class="slide-1 slide">
      <div class="copy-cta-container">
        <h1>Slide 1</h1>
      </div>
    </div>
    <div class="slide-2 slide">
      <div class="copy-cta-container">
        <h1>Slide 2</h1>
      </div>
    </div>
    <div class="slide-3 slide">
      <div class="copy-cta-container">
        <h1>Slide 3</h1>
      </div>
    </div>
  </div>
  <a href="#" class="prev">&lt;</a>
  <a href="#" class="next">&gt;</a>
  <section class="carousel-dots">
    <span class="dot"></span>
    <span class="dot"></span>
    <span class="dot"></span>
  </section>
</div>