<!DOCTYPE html> <html> <head> <title>利用JavaScript开发网页banner切换</title> <style> .banner { display: flex; justify-content: center; align-items: center; height: 400px; } .banner img { max-width: 100%; max-height: 100%; object-fit: contain; } .controls { display: flex; justify-content: center; margin-top: 20px; } .controls button { margin: 0 10px; } </style> </head> <body> <div class="banner"> <img id="image" src="images/1.jpg" alt="image"> </div> <div class="controls"> <button id="prev">上一张</button> <button id="next">下一张</button> </div> <script> // 获取元素 const image = document.getElementById("image"); const prevBtn = document.getElementById("prev"); const nextBtn = document.getElementById("next"); // 图片列表 const images = ["images/1.jpg", "images/2.jpg", "images/3.jpg", "images/4.jpg", "images/5.jpg"]; // 当前显示的图片索引 let currentIndex = 0; // 切换到上一张图片 prevBtn.addEventListener("click", () => { currentIndex--; if (currentIndex < 0) { currentIndex = images.length - 1; } image.src = images[currentIndex]; }); // 切换到下一张图片 nextBtn.addEventListener("click", () => { currentIndex++; if (currentIndex >= images.length) { currentIndex = 0; } image.src = images[currentIndex]; }); </script> </body> </html>
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标签: banner切换
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