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headlinenews.html
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<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Headlines Concern</title>
</head>
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
max-width: 1000px;
}
.headline-container {
width: 1140px;
margin: auto;
text-align: center;
padding-top: 20px;
padding-left: 20%;
}
.headline-container img {
width: 100%;
height: auto;
display: block;
border-radius: 5px;
}
h2 {
font-size: 24px;
margin-bottom: 20px;
}
h2 span {
font-size: 14px;
color: #555;
}
.slider {
position: relative;
overflow: hidden;
width: 100%;
border-top: 1px solid #e0e0e0;
border-bottom: 1px solid #e0e0e0;
padding: 20px 0;
}
.slider-wrapper {
display: flex;
transition: transform 0.5s ease-in-out;
}
.slider-item {
min-width: 25%;
box-sizing: border-box;
padding: 10px;
}
.slider-item img {
width: 100%;
height: auto;
display: block;
border-radius: 5px;
}
.slider-item p {
font-size: 16px;
color: #333;
margin-top: 10px;
}
.slider-item span {
font-size: 12px;
color: #999;
}
.slider-controls {
position: absolute;
top: 50%;
width: 75%;
display: flex;
justify-content: space-between;
transform: translateY(-50%);
pointer-events: none;
}
button {
position: absolute;
top: 50%;
transform: translateY(-50%);
background-color: rgba(0, 0, 0, 0.5);
color: white;
border: none;
padding: 10px;
cursor: pointer;
border: 1px solid #000;
display: flex;
align-items: center;
pointer-events: all;
}
#prev {
left: 10px;
}
#next {
right: 10px;
}
button:hover {
background-color: rgba(0, 0, 0, 0.7);
}
.slider-indicators {
text-align: center;
margin-top: 10px;
}
.slider-indicators span {
display: inline-block;
width: 10px;
height: 10px;
background-color: #ccc;
border-radius: 50%;
margin: 0 5px;
cursor: pointer;
}
.slider-indicators span.active {
background-color: #007bff;
}
</style>
<body>
<div class="headline-container">
<img src="./img/headlines1/head-news.png" alt="">
<div class="slider">
<div class="slider-wrapper" id="slider-wrapper">
</div>
</div>
<div class="slider-controls">
<button id="prev">❮</button>
<button id="next">❯</button>
</div>
</div>
</body>
<script>
/*从指定json中读取新闻数据,并显示到轮播图中*/
document.addEventListener('DOMContentLoaded', () => {
const sliderWrapper = document.getElementById('slider-wrapper');/*sliderWrapper,所有新闻项*/
const prevButton = document.getElementById('prev');
const nextButton = document.getElementById('next');/*前进后退按钮项*/
const sliderIndicators = document.createElement('div');/*页签*/
sliderIndicators.className = 'slider-indicators';
document.querySelector('.headline-container').appendChild(sliderIndicators);
/*定义当前显示的新闻项的索引和用于存储新闻数据的数组*/
let currentIndex = 0;
let newsData = [];
const itemsPerPage = 4;
// 读取新闻数据
function loadNews() {
fetch('./json/news.json')
.then(response => response.json())
.then(data => {
newsData = data;
renderNewsItems();
renderIndicators();
showSlide(0);
})
.catch(error => console.error('Error loading news:', error));
}
// 显示新闻项目和页签,这里用到了模板字符串
function renderNewsItems() {
sliderWrapper.innerHTML = '';
newsData.forEach(news => {
const newsItem = document.createElement('div');
newsItem.classList.add('slider-item');
newsItem.innerHTML = `
<img src="${news.img}" alt="News">
<p>${news.description} <span>(${news.date})</span></p>
`;
sliderWrapper.appendChild(newsItem);
});
}
// 底部页签
function renderIndicators() {
sliderIndicators.innerHTML = ''; // Clear existing indicators
const pageCount = Math.ceil(newsData.length / itemsPerPage);
for (let i = 0; i < pageCount; i++) {
const indicator = document.createElement('span');
indicator.addEventListener('click', () => showSlide(i * itemsPerPage));
sliderIndicators.appendChild(indicator);
}
}
function showSlide(index) {
const pageCount = Math.ceil(newsData.length / itemsPerPage);
if (index >= pageCount * itemsPerPage) {
currentIndex = 0;
} else if (index < 0) {
currentIndex = (pageCount - 1) * itemsPerPage;
} else {
currentIndex = index;
}
const offset = -currentIndex * 100 / itemsPerPage;
sliderWrapper.style.transform = `translateX(${offset}%)`;
updateIndicators();
}
function updateIndicators() {
const indicators = sliderIndicators.querySelectorAll('span');
indicators.forEach((indicator, index) => {
indicator.classList.toggle('active', index === Math.floor(currentIndex / itemsPerPage));
});
}
prevButton.addEventListener('click', () => {
showSlide(currentIndex - itemsPerPage);
});
nextButton.addEventListener('click', () => {
showSlide(currentIndex + itemsPerPage);
});
// 5秒自动轮播
setInterval(() => {
showSlide(currentIndex + itemsPerPage);
}, 5000);
loadNews();
});
</script>
</html>