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| {% raw %}
<!-- 自定义元素容器 -->
<image-carousel data-images='[
"https://pic1.imgdb.cn/item/681216d158cb8da5c8d56900.webp",
"https://pic1.imgdb.cn/item/681216e858cb8da5c8d56904.webp",
"https://pic1.imgdb.cn/item/681216d058cb8da5c8d568fb.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f46.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f45.webp",
"https://pic1.imgdb.cn/item/681216e858cb8da5c8d56904.webp",
"https://pic1.imgdb.cn/item/681216d058cb8da5c8d568fb.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f46.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f45.webp"
]'></image-carousel>
<script>
// 定义自定义元素
class ImageCarousel extends HTMLElement {
constructor() {
super();
// 创建Shadow DOM
this.attachShadow({ mode: 'open' });
// 初始化图片URL数组
this.imageUrls = [];
this.index = 0;
this.time = null;
}
connectedCallback() {
// 从data-images属性获取图片URL
const imagesData = this.getAttribute('data-images');
try {
this.imageUrls = imagesData ? JSON.parse(imagesData) : this.getDefaultImages();
} catch (e) {
console.error("Invalid images data format, using default images instead");
this.imageUrls = this.getDefaultImages();
}
this.render();
this.initElements();
this.createImages();
this.createThumbnails(); // 创建缩略图
this.timer();
this.addEventListeners();
}
getDefaultImages() {
return [
"https://pic1.imgdb.cn/item/681216d158cb8da5c8d56900.webp",
"https://pic1.imgdb.cn/item/681216e858cb8da5c8d56904.webp",
"https://pic1.imgdb.cn/item/681216d058cb8da5c8d568fb.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f46.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f45.webp",
"https://pic1.imgdb.cn/item/681216e858cb8da5c8d56904.webp",
"https://pic1.imgdb.cn/item/681216d058cb8da5c8d568fb.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f46.webp",
"https://pic1.imgdb.cn/item/6811e1d758cb8da5c8d54f45.webp"
];
}
render() {
this.shadowRoot.innerHTML = `
<style>
* {
padding: 0px;
margin: 0px;
list-style: none;
bottom: 0;
text-decoration: none;
}
.carousel-container {
display: flex;
flex-direction: column;
align-items: center;
width: 100%;
}
.shell {
width: 870px;
height: 520px;
position: relative;
overflow: hidden;
border-radius: 5px;
border: 10px #fff solid;
}
.images {
width: ${this.imageUrls.length * 100}%;
height: 100%;
display: flex;
position: absolute;
left: 0;
transition: 0.5s;
}
.img {
width: ${100 / this.imageUrls.length}%;
background-size: cover;
background-position: center;
}
.min-images {
display: flex;
justify-content: center;
position: absolute;
bottom: 20px;
width: 100%;
z-index: 999;
}
.min {
width: 10px;
height: 10px;
margin: 0 3px;
cursor: pointer;
border-radius: 50%;
background-color: white;
border: 1px solid rgba(0, 0, 0, 0.5);
transition: all 0.3s;
}
.min.active {
background-color: transparent;
border-color: white;
}
.button {
width: 100%;
height: 100%;
position: absolute;
display: flex;
justify-content: space-between;
user-select: none;
}
.button-left,
.button-right {
font-size: 50px;
background-color: rgba(160, 193, 255, 0.7);
padding: 0 20px;
cursor: pointer;
line-height: 500px;
}
/* 缩略图样式 */
.thumbnails {
display: flex;
justify-content: center;
gap: 10px;
padding: 10px;
background-color: #f0f0f0;
border-radius: 5px;
margin-top: 10px;
width: 870px;
}
.thumbnail {
width: 80px;
height: 50px;
background-size: cover;
background-position: center;
cursor: pointer;
border: 2px solid transparent;
border-radius: 3px;
transition: all 0.3s;
}
.thumbnail.active {
border-color: #4361ee;
transform: scale(1.05);
}
</style>
<div class="carousel-container">
<div class="shell">
<ul class="images"></ul>
<ul class="min-images"></ul>
<div class="button">
<div class="button-left"><</div>
<div class="button-right">></div>
</div>
</div>
<div class="thumbnails"></div> <!-- 缩略图容器 -->
</div>
`;
}
initElements() {
this.imagesContainer = this.shadowRoot.querySelector(".images");
this.minImagesContainer = this.shadowRoot.querySelector(".min-images");
this.leftButton = this.shadowRoot.querySelector(".button-left");
this.rightButton = this.shadowRoot.querySelector(".button-right");
this.thumbnailsContainer = this.shadowRoot.querySelector(".thumbnails");
}
createImages() {
// 清空容器
this.imagesContainer.innerHTML = '';
this.minImagesContainer.innerHTML = '';
this.imageUrls.forEach((url, i) => {
const img = document.createElement("li");
img.classList.add("img");
img.style.backgroundImage = `url(${url})`;
this.imagesContainer.appendChild(img);
const minImg = document.createElement("li");
minImg.classList.add("min");
if (i === 0) {
minImg.classList.add("active");
}
this.minImagesContainer.appendChild(minImg);
});
}
// 创建缩略图
createThumbnails() {
this.thumbnailsContainer.innerHTML = '';
this.imageUrls.forEach((url, i) => {
const thumbnail = document.createElement("div");
thumbnail.classList.add("thumbnail");
thumbnail.style.backgroundImage = `url(${url})`;
if (i === 0) {
thumbnail.classList.add("active");
}
thumbnail.addEventListener("click", () => {
this.index = i;
this.updateIndicators();
this.updateThumbnails();
this.position();
clearInterval(this.time);
this.timer();
});
this.thumbnailsContainer.appendChild(thumbnail);
});
}
position() {
this.imagesContainer.style.left = (this.index * -100) + "%";
}
add() {
if (this.index >= this.imageUrls.length - 1) {
this.index = 0;
} else {
this.index++;
}
this.updateIndicators();
this.updateThumbnails();
}
desc() {
if (this.index < 1) {
this.index = this.imageUrls.length - 1;
} else {
this.index--;
}
this.updateIndicators();
this.updateThumbnails();
}
updateIndicators() {
const minImages = this.minImagesContainer.querySelectorAll(".min");
minImages.forEach((minImg, i) => {
if (i === this.index) {
minImg.classList.add("active");
} else {
minImg.classList.remove("active");
}
});
}
// 更新缩略图选中状态
updateThumbnails() {
const thumbnails = this.thumbnailsContainer.querySelectorAll(".thumbnail");
thumbnails.forEach((thumbnail, i) => {
if (i === this.index) {
thumbnail.classList.add("active");
} else {
thumbnail.classList.remove("active");
}
});
}
timer() {
this.time = setInterval(() => {
this.add();
this.position();
}, 3000);
}
addEventListeners() {
this.leftButton.addEventListener("click", () => {
this.desc();
this.position();
clearInterval(this.time);
this.timer();
});
this.rightButton.addEventListener("click", () => {
this.add();
this.position();
clearInterval(this.time);
this.timer();
});
this.minImagesContainer.addEventListener("click", (event) => {
if (event.target.classList.contains("min")) {
const minImages = Array.from(this.minImagesContainer.children);
const targetIndex = minImages.indexOf(event.target);
this.index = targetIndex;
this.updateIndicators();
this.updateThumbnails();
this.position();
clearInterval(this.time);
this.timer();
}
});
}
}
// 注册自定义元素
customElements.define('image-carousel', ImageCarousel);
</script>
{% endraw %}
|
