{"id":166857,"date":"2024-05-08T15:46:03","date_gmt":"2024-05-08T07:46:03","guid":{"rendered":""},"modified":"2024-05-08T15:46:08","modified_gmt":"2024-05-08T07:46:08","slug":"javascript%e5%ae%9e%e7%8e%b0%e7%82%b9%e5%87%bb%e4%b8%8d%e5%90%8c%e5%9b%be%e7%89%87%e6%97%b6%ef%bc%8c%e5%90%8c%e4%b8%80%e4%b8%aa%e4%bd%8d%e7%bd%ae%e6%98%be%e7%a4%ba%e4%b8%8d%e5%90%8c%e7%85%a7%e7%89%87","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/166857.html","title":{"rendered":"JavaScript\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\uff0c\u540c\u4e00\u4e2a\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7167\u7247"},"content":{"rendered":"

\"JavaScript\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\uff0c\u540c\u4e00\u4e2a\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7167\u7247\"<\/p>\n

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\u4e0b\u9762\u5c06\u5177\u4f53\u4ecb\u7ecd\u5982\u4f55\u901a\u8fc7\u7f16\u7a0b\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u3002<\/p>\n<\/p>\n

\u4e00\u3001HTML \u7ed3\u6784<\/h3>\n<\/p>\n

\u9996\u5148\uff0c\u5b9a\u4e49HTML\u7ed3\u6784\u6765\u663e\u793a\u7f29\u7565\u56fe\u548c\u5bf9\u5e94\u7684\u5927\u56fe\u3002<\/p>\n<\/p>\n

<div id="gallery"><\/p>\n
    <img id="mAI<\/a>n-image" src="initial-image.jpg" alt="Main Image"><\/p>\n
<\/div><\/p>\n
<div id="thumbnails"><\/p>\n
    <img class="thumbnail" src="thumbnail1.jpg" data-fullsize="fullsize1.jpg" alt="Thumbnail 1"><\/p>\n
    <img class="thumbnail" src="thumbnail2.jpg" data-fullsize="fullsize2.jpg" alt="Thumbnail 2"><\/p>\n
    <img class="thumbnail" src="thumbnail3.jpg" data-fullsize="fullsize3.jpg" alt="Thumbnail 3"><\/p>\n
    <!-- \u66f4\u591a\u7f29\u7565\u56fe --><\/p>\n
<\/div><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u7ed3\u6784\u4e2d\uff0cmain-image<\/code> \u662f\u8981\u5728\u540c\u4e00\u4e2a\u4f4d\u7f6e\u4e0d\u65ad\u66f4\u65b0\u7684\u56fe\u7247\uff0c\u800c .thumbnail<\/code> \u7c7b\u5219\u88ab\u5206\u914d\u7ed9\u6bcf\u4e2a\u7f29\u7565\u56fe\u3002<\/p>\n<\/p>\n
\u4e8c\u3001CSS \u6837\u5f0f\u8bbe\u8ba1<\/h3>\n<\/p>\n
\u63a5\u7740\uff0c\u4f7f\u7528CSS\u6765\u8bbe\u5b9a\u56fe\u7247\u7684\u663e\u793a\u6837\u5f0f\u3002<\/p>\n<\/p>\n
#gallery {<\/p>\n
    width: 80%;<\/p>\n
    margin: auto;<\/p>\n
}<\/p>\n
#main-image {<\/p>\n
    width: 100%;<\/p>\n
    height: auto;<\/p>\n
    display: block;<\/p>\n
    margin-bottom: 20px;<\/p>\n
}<\/p>\n
#thumbnails {<\/p>\n
    display: flex;<\/p>\n
    justify-content: center;<\/p>\n
    gap: 10px;<\/p>\n
}<\/p>\n
.thumbnail {<\/p>\n
    width: 100px;<\/p>\n
    height: auto;<\/p>\n
    cursor: pointer;<\/p>\n
}<\/p>\n
.thumbnail:hover {<\/p>\n
    opacity: 0.7;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u8bbe\u8ba1\u4e2d\uff0c\u7f29\u7565\u56fe\u6709\u9f20\u6807\u60ac\u505c\u6548\u679c\uff0c\u5e76\u4e14\u4ee5\u53ef\u70b9\u51fb\u7684\u5f62\u5f0f\u5c55\u793a\u3002<\/p>\n<\/p>\n
\u4e09\u3001JavaScript \u4e8b\u4ef6\u5904\u7406<\/h3>\n<\/p>\n
\u6700\u540e\uff0c\u7f16\u5199JavaScript\u811a\u672c\u6765\u5904\u7406\u70b9\u51fb\u4e8b\u4ef6\uff0c\u5e76\u66f4\u6362\u4e3b\u56fe\u3002<\/p>\n<\/p>\n
window.addEventListener('DOMContentLoaded', (event) => {<\/p>\n
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            mainImage.src = fullSizeImage;<\/p>\n
        });<\/p>\n
    });<\/p>\n
});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u811a\u672c\u76d1\u542cDOM\u5185\u5bb9\u52a0\u8f7d\u5b8c\u6bd5\u4e8b\u4ef6\uff0c\u7136\u540e\u7ed9\u6bcf\u4e2a\u7f29\u7565\u56fe\u6dfb\u52a0\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\u5668\u3002\u5f53\u7f29\u7565\u56fe\u88ab\u70b9\u51fb\u65f6\uff0c\u5b83\u901a\u8fc7data-fullsize<\/code>\u5c5e\u6027\u83b7\u53d6\u76f8\u5e94\u7684\u5927\u56feURL\uff0c\u5e76\u66f4\u65b0main-image<\/code>\u7684src<\/code>\u5c5e\u6027<\/strong>\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4ea4\u4e92\u903b\u8f91\u4f18\u5316<\/h3>\n<\/p>\n
\u4e3a\u4e86\u8fdb\u4e00\u6b65\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u53ef\u4ee5\u8003\u8651\u52a0\u5165\u4e00\u4e9b\u4ea4\u4e92\u903b\u8f91\u7684\u4f18\u5316\u3002<\/p>\n<\/p>\n
\u56fe\u7247\u9884\u52a0\u8f7d<\/h4>\n<\/p>\n
\u4e3a\u4e86\u51cf\u5c11\u70b9\u51fb\u7f29\u7565\u56fe\u540e\u5927\u56fe\u51fa\u73b0\u7684\u5ef6\u8fdf\uff0c\u53ef\u4ee5\u9884\u5148\u52a0\u8f7d\u6240\u6709\u5927\u56fe\u3002<\/p>\n<\/p>\n
function preloadImages() {<\/p>\n
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        img.src = thumbnail.getAttribute('data-fullsize');<\/p>\n
    });<\/p>\n
}<\/p>\n
window.addEventListener('DOMContentLoaded', preloadImages);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u9884\u52a0\u8f7d\u53ef\u4ee5\u786e\u4fdd\u7528\u6237\u5728\u70b9\u51fb\u7f29\u7565\u56fe\u65f6\u5927\u56fe\u53ef\u4ee5\u7acb\u5373\u663e\u793a\u51fa\u6765\u3002<\/p>\n<\/p>\n
\u5f53\u524d\u9009\u4e2d\u72b6\u6001<\/h4>\n<\/p>\n
\u53ef\u4ee5\u4e3a\u5f53\u524d\u9009\u4e2d\u7684\u7f29\u7565\u56fe\u6dfb\u52a0\u4e00\u4e2a\u9ad8\u4eae\u72b6\u6001\u4ee5\u589e\u52a0\u53ef\u89c6\u53cd\u9988\u3002<\/p>\n<\/p>\n
thumbnails.forEach((thumbnail) => {<\/p>\n
    thumbnail.addEventListener('click', function() {<\/p>\n
        \/\/ \u79fb\u9664\u4e4b\u524d\u9009\u4e2d\u7684\u7f29\u7565\u56fe\u9ad8\u4eae<\/p>\n
        document.querySelector('.thumbnail.active')?.classList.remove('active');<\/p>\n
        \/\/ \u4e3a\u5f53\u524d\u70b9\u51fb\u7684\u7f29\u7565\u56fe\u6dfb\u52a0\u9ad8\u4eae\u7c7b<\/p>\n
        thumbnail.classList.add('active');<\/p>\n
        \/\/ \u66f4\u65b0\u5927\u56fe<\/p>\n
        const fullSizeImage = thumbnail.getAttribute('data-fullsize');<\/p>\n
        mainImage.src = fullSizeImage;<\/p>\n
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});<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5e76\u5728CSS\u4e2d\u6dfb\u52a0.active<\/code>\u7c7b\u7684\u6837\u5f0f\uff1a<\/p>\n<\/p>\n
.thumbnail.active {<\/p>\n
    border: 2px solid #333;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e9b\u4ea4\u4e92\u7ec6\u8282\u80fd\u4f7f\u56fe\u7247\u5207\u6362\u529f\u80fd\u66f4\u4e3a\u6d41\u7545\u3001\u76f4\u89c2<\/strong>\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\uff0c\u5728\u540c\u4e00\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7167\u7247\u7684\u529f\u80fd\u3002\u8fd9\u4e0d\u4ec5\u63d0\u5347\u4e86\u7f51\u7ad9\u7684\u4ea4\u4e92\u6027\uff0c\u540c\u65f6\u4e5f\u589e\u5f3a\u4e86\u7528\u6237\u4f53\u9a8c\u3002\u5b66\u4f1a\u8fd9\u6837\u7684\u6280\u80fd\u53ef\u4ee5\u8ba9\u4f60\u5728\u5f00\u53d1\u4e2a\u4eba\u6216\u5546\u4e1a\u7f51\u7ad9\u65f6\u5e94\u5bf9\u7c7b\u4f3c\u7684\u529f\u80fd\u9700\u6c42\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u5982\u4f55\u4f7f\u7528JavaScript\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\uff0c\u540c\u4e00\u4e2a\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7684\u7167\u7247\uff1f<\/strong><\/p>\n
1. \u5982\u4f55\u6dfb\u52a0\u70b9\u51fb\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u6765\u5b9e\u73b0\u4e0d\u540c\u56fe\u7247\u7684\u663e\u793a\uff1f<\/strong><\/p>\n
\u5728JavaScript\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u70b9\u51fb\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u6765\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\uff0c\u540c\u4e00\u4e2a\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7684\u7167\u7247\u3002\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u7ed9\u6bcf\u4e2a\u56fe\u7247\u5143\u7d20\u6dfb\u52a0\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26\u6216class\u3002\u7136\u540e\uff0c\u4f7f\u7528addEventListener\u65b9\u6cd5\u4e3a\u6bcf\u4e2a\u56fe\u7247\u5143\u7d20\u6dfb\u52a0\u70b9\u51fb\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002\u5728\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539DOM\u5143\u7d20\u7684src\u5c5e\u6027\u6765\u6539\u53d8\u56fe\u7247\u7684\u663e\u793a\u3002<\/p>\n
2. \u5982\u4f55\u4fdd\u5b58\u4e0d\u540c\u7684\u7167\u7247\u8def\u5f84\uff1f<\/strong><\/p>\n
\u4e3a\u4e86\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\u663e\u793a\u4e0d\u540c\u7684\u7167\u7247\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4fdd\u5b58\u4e0d\u540c\u7684\u7167\u7247\u8def\u5f84\u6765\u5b9e\u73b0\u3002\u53ef\u4ee5\u5c06\u7167\u7247\u8def\u5f84\u4fdd\u5b58\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\uff0c\u6bcf\u4e2a\u5143\u7d20\u5bf9\u5e94\u4e00\u4e2a\u56fe\u7247\u5143\u7d20\u3002\u5f53\u70b9\u51fb\u67d0\u4e2a\u56fe\u7247\u5143\u7d20\u65f6\uff0c\u901a\u8fc7\u7d22\u5f15\u503c\u6765\u83b7\u53d6\u76f8\u5e94\u7684\u7167\u7247\u8def\u5f84\uff0c\u5e76\u5c06\u5176\u8d4b\u503c\u7ed9\u76ee\u6807\u4f4d\u7f6e\u7684\u56fe\u7247\u5143\u7d20\u7684src\u5c5e\u6027\u3002<\/p>\n
3. \u5982\u4f55\u5b9e\u73b0\u5faa\u73af\u5207\u6362\u4e0d\u540c\u7684\u7167\u7247\uff1f<\/strong><\/p>\n
\u5982\u679c\u5e0c\u671b\u70b9\u51fb\u56fe\u7247\u65f6\u80fd\u591f\u5faa\u73af\u5207\u6362\u663e\u793a\u4e0d\u540c\u7684\u7167\u7247\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u8ba1\u6570\u5668\u6765\u8ddf\u8e2a\u5f53\u524d\u663e\u793a\u7684\u7167\u7247\u7d22\u5f15\u3002\u6bcf\u6b21\u70b9\u51fb\u56fe\u7247\u65f6\uff0c\u8ba1\u6570\u5668\u52a01\uff0c\u5e76\u6839\u636e\u8ba1\u6570\u5668\u7684\u503c\u53d6\u51fa\u5bf9\u5e94\u7684\u7167\u7247\u8def\u5f84\u3002\u5f53\u8ba1\u6570\u5668\u8fbe\u5230\u6570\u7ec4\u7684\u957f\u5ea6\u65f6\uff0c\u53ef\u4ee5\u5c06\u8ba1\u6570\u5668\u91cd\u7f6e\u4e3a0\uff0c\u5b9e\u73b0\u5faa\u73af\u5207\u6362\u4e0d\u540c\u7684\u7167\u7247\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5b9e\u73b0\u70b9\u51fb\u4e0d\u540c\u56fe\u7247\u65f6\uff0c\u5728\u540c\u4e00\u4e2a\u4f4d\u7f6e\u663e\u793a\u4e0d\u540c\u7167\u7247\uff0c\u53ef\u4ee5\u901a\u8fc7HTML\u3001CSS\u548cJavaScript\u8fdb\u884c\u534f\u540c\u5904\u7406\uff1aHT […]","protected":false},"author":3,"featured_media":166865,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/166857"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=166857"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/166857\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/166865"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=166857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=166857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=166857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}