将JavaScript滑块添加到BigCartel自定义页面

如何解决将JavaScript滑块添加到BigCartel自定义页面

我正在尝试向Bigcartel上的自定义页面之一添加一个带有javascript（无plungins）的滑块。我已经在Codepen中运行了代码，它似乎工作正常。但是，我似乎无法使其在大型卡特尔的页面上正常工作。箭头按钮位于幻灯片下方，而不是幻灯片的左侧和右侧，我也看不到幻灯片下方的导航“点”。 这是html中的代码：

    <div class="slideshow-container">

<div class="mySlides fade">
  <img src="https://www.dropBox.com/s/ye3zh6ygyw55z0j/space1.jpg?raw=1" style="width:100%">
</div>

<div class="mySlides fade">
  <img src="https://www.dropBox.com/s/n7i41xgs9fclfjq/space2.jpg?raw=1" style="width:100%">
</div>

<div class="mySlides fade">
  <img src="https://www.dropBox.com/s/lz6pbim2kyo6lsy/space3.jpg?raw=1" style="width:100%">
</div>

<div class="mySlides fade">
  <img src="https://www.dropBox.com/s/r8efjzjuow7i720/space4.jpg?raw=1" style="width:100%">
</div>

<a class="prev" onclick="plusSlides(-1)">&#10094;</a>
<a class="next" onclick="plusSlides(1)">&#10095;</a>

</div>
<br>

<div style="text-align:center">
  <span class="dot" onclick="currentSlide(1)"></span> 
  <span class="dot" onclick="currentSlide(2)"></span> 
  <span class="dot" onclick="currentSlide(3)"></span> 
  <span class="dot" onclick="currentSlide(4)"></span> 


</div>

<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");
  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>

这是CSS：

    * {Box-sizing: border-Box}
.mySlides {display: none}
img {vertical-align: middle;}

/* Slideshow container */
.slideshow-container {
  max-width: 900px;
  position: relative;
  margin: auto;
}

/* Next & prevIoUs buttons */
.prev,.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -22px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}

/* Position the "next button" to the right */
.next {
  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(0,0.8);
}


/* The dots/bullets/indicators */
.dot {
  cursor: pointer;
  height: 8px;
  width: 8px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

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

/* Fading animation */
.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}
}

/* On smaller screens,decrease text size */
@media only screen and (max-width: 300px) {
  .prev,.next,.text {font-size: 11px}
}

这是Bigcartel中的页面：https://www.mellowsheng.com/test

以下是滑块在Codepen中的外观：https://codepen.io/jennnyt/pen/rNepEJa