我在轮播中创建循环时遇到问题，因此在单击事件 - rightButton 上到达最后一张卡后它将返回到第一张卡。
到目前为止，轮播在到达最后一张卡时停止。
const carousel = document.querySelector("[data-target='carousel']");
const card = carousel.querySelector("[data-target='card']");
const leftButton = document.querySelector("[data-action='slideLeft']");
const rightButton = document.querySelector("[data-action='slideRight']");
const carouselWidth = carousel.offsetWidth;
const cardStyle = card.currentStyle || window.getComputedStyle(card)
const cardMarginRight = Number(cardStyle.marginRight.match(/\d+/g)[0]);
const cardCount = carousel.querySelectorAll("[data-target='card']").length;
let offset = 0;
const maxX = -((cardCount / 3) * carouselWidth +
(cardMarginRight * (cardCount / 3)) -
carouselWidth - cardMarginRight);
leftButton.addEventListener("click", function() {
if (offset !== 0) {
offset += carouselWidth + cardMarginRight;
carousel.style.transform = `translateX(${offset}px)`;
}
})
rightButton.addEventListener("click", function() {
if (offset !== maxX) {
offset -= carouselWidth + cardMarginRight;
carousel.style.transform = `translateX(${offset}px)`;
}
})
.wrapper {
height: 100px;
width: 432px;
position: relative;
overflow: hidden;
margin: 0 auto;
}
.button-wrapper {
width: 100%;
height: 100%;
display: flex;
justify-content: space-between;
align-items: center;
position: absolute;
}
.carousel {
margin: 0;
padding: 0;
list-style: none;
width: 100%;
display: flex;
position: absolute;
left: 0;
transition: all 1s ease;
}
.card {
background: black;
min-width: 100px;
height: 100px;
margin-right: 1rem;
display: inline-block;
}
span {
color:#ffffff;
}
<div class="wrapper">
<ul class="carousel" data-target="carousel">
<li class="card" data-target="card"><span>1</span></li>
<li class="card" data-target="card"><span>2</span></li>
<li class="card" data-target="card"><span>3</span></li>
<li class="card" data-target="card"><span>4</span></li>
<li class="card" data-target="card"><span>5</span></li>
<li class="card" data-target="card"><span>6</span></li>
<li class="card" data-target="card"><span>7</span></li>
<li class="card" data-target="card"><span>8</span></li>
<li class="card" data-target="card"><span>9</span></li>
</ul>
<div class="button-wrapper">
<button data-action="slideLeft">L</button>
<button data-action="slideRight">R</button>
</div>
</div>
jsfiddle 上可用的代码：https://jsfiddle.net/2qv6mpb1/ https://jsfiddle.net/2qv6mpb1/
有人可以为我指明如何实现这一目标的正确方向吗？我
您需要处理偏移量何时等于 maxX，并将偏移量重置为零。
rightButton.addEventListener("click", function() {
if (offset !== maxX) {
offset -= carouselWidth + cardMarginRight;
carousel.style.transform = `translateX(${offset}px)`;
} else {
offset = 0;
carousel.style.transform = `translateX(${offset}px)`;
}
})
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