![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618351338276.jpg\")
<\/p>\n<\/p>\n
\u76f8\u540c\u70b9\uff1a<\/p>\n
\u4e0d\u540c\u70b9\uff1a<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618351776892.jpg\")
<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618351906659.jpg\")
<\/p>\n
\u4eca\u5929\u6211\u4eec\u6765\u63a2\u7d22\u4e00\u4e0b\u524d\u7aef\u8d44\u6e90\u7684\u4e00\u4e9b\u6307\u4ee4\u4ee5\u53ca\u5b83\u4eec\u5982\u4f55\u6765\u63d0\u9ad8\u7f51\u7ad9\u6027\u80fd\u7684\u3002\u4f60\u5e94\u8be5\u542c\u8fc7 preload \u548c prefetch\uff0c\u4f46\u8fd9\u6b21\u6211\u4eec\u60f3\u6df1\u6316\u5b83\u4eec\u4e4b\u95f4\u7684\u4e0d\u540c\u4ee5\u53ca\u5982\u4f55\u53d7\u76ca\u4e8e\u5b83\u4eec\u3002\u5b83\u4eec\u5141\u8bb8\u5f00\u53d1\u8005\u4f18\u5316\u8d44\u6e90\u7684\u4f20\u9012\u65f6\u95f4\u3001\u7f29\u77ed\u5f80\u8fd4\u6b21\u6570\u7b49\u3002<\/p>\n
preload \u662f\u4e00\u4e2a\u65b0\u7684 Web \u6807\u51c6\uff0c\u5728\u9875\u9762\u751f\u547d\u5468\u671f\u4e2d\u63d0\u524d\u52a0\u8f7d\u4f60\u6307\u5b9a\u7684\u8d44\u6e90\uff0c\u540c\u65f6\u786e\u4fdd\u5728\u6d4f\u89c8\u5668\u7684\u4e3b\u8981\u6e32\u67d3\u673a\u5236\u542f\u52a8\u4e4b\u524d\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u4e86\u5176\u4e0d\u4f1a\u963b\u6b62\u6d4f\u89c8\u5668\u7684\u6e32\u67d3\u5e76\u63d0\u524d\u52a0\u8f7d\u8d44\u6e90\u4ee5\u6b64\u6765\u63d0\u9ad8\u6027\u80fd\u3002\u901a\u5e38\u4f7f\u7528 preload \u662f\u7528\u6765\u52a0\u8f7d\u56fe\u7247\u3001CSS\u3001JavaScript\u548c\u5b57\u4f53\u6587\u4ef6\u3002preload \u7684\u8bed\u6cd5\u548c\u52a0\u8f7d CSS \u7c7b\u4f3c\uff1a<\/p>\n
<link rel="stylesheet" href="styles\/main.css"> \/\/ \u52a0\u8f7dCSS\n<\/code><\/pre>\n\u9664\u4e86\u8981\u628a rel \u6539\u4e3a preload \uff0c\u540c\u65f6\u8fd8\u8981\u6307\u5b9a as \u5c5e\u6027\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n
<head>\n <meta charset="utf-8">\n <title>JS and CSS preload example<\/title>\n\n <link rel="preload" href="style.css" as="style">\n <link rel="preload" href="main.js" as="script">\n\n <link rel="stylesheet" href="style.css">\n<\/head>\n\n<body>\n <h1>bouncing balls<\/h1>\n <canvas><\/canvas>\n\n <script src="main.js" defer><\/script>\n<\/body>\n<\/code><\/pre>\n\u4f7f\u7528 as \u6765\u6307\u5b9a\u8d44\u6e90\u7684\u7c7b\u578b\u53ef\u4ee5\u4f7f\u6d4f\u89c8\u5668\uff1a<\/p>\n
\n- \u66f4\u52a0\u7cbe\u786e\u5730\u786e\u5b9a\u8d44\u6e90\u52a0\u8f7d\u7684\u4f18\u5148\u7ea7\u3002<\/li>\n
- \u5c06\u5176\u5b58\u50a8\u5728\u7f13\u5b58\u4e2d\u4ee5\u5907\u5c06\u6765\u4f7f\u7528\uff0c\u5e76\u5728\u9002\u5f53\u65f6\u91cd\u7528\u8d44\u6e90\u3002<\/li>\n
- \u5c06\u6b63\u786e\u7684\u5185\u5bb9\u5b89\u5168\u7b56\u7565\u5e94\u7528\u4e8e\u8d44\u6e90\u3002<\/li>\n
- \u4e3a\u5176\u8bbe\u7f6e\u6b63\u786e\u7684 Accept \u8bf7\u6c42\u6807\u5934\u3002<\/li>\n<\/ol>\n
preload \u652f\u6301\u5982\u4e0b\u8d44\u6e90\u7684\u52a0\u8f7d\uff1a<\/p>\n
\naudio\u3001document\u3001embed\u3001fetch\u3001font\u3001image\u3001object\u3001script\u3001style\u3001track\u3001worker\u3001video\uff08\u6d4f\u89c8\u5668\u6682\u672a\u5b9e\u73b0\uff09<\/p>\n<\/blockquote>\n
\u82e5\u4f60\u52a0\u8f7d\u4e86\u4e00\u4e2a CORS \u5f00\u542f\u7684\u8d44\u6e90\uff0c\u5fc5\u987b\u8981\u52a0\u4e0a crossorigin \u5c5e\u6027\uff1a<\/p>\n
<link rel="preload" href="https:\/\/example.com\/fonts\/font.woff" as="font" crossorigin>\n<\/code><\/pre>\n\u9664\u4e86\u4f7f\u7528 html \u6807\u7b7e\u6765\u4f7f\u7528 preload\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u65b9\u5f0f\uff1a<\/p>\n
<script>\nvar res = document.createElement("link");\nres.rel = "preload";\nres.as = "style";\nres.href = "styles\/other.css";\ndocument.head.appendChild(res);\n<\/script>\n<\/code><\/pre>\nLink: <https:\/\/example.com\/other\/styles.css>; rel=preload; as=style\n<\/code><\/pre>\npreload \u7684\u6d4f\u89c8\u5668\u652f\u6301\u60c5\u51b5\u5982\u4e0b\uff1a<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618353308628.jpg\")
<\/p>\n
\u6ce8\u610f\uff1a<\/p>\n
1.\u6d4f\u89c8\u5668\u4f7f\u7528 preload \u52a0\u8f7d\u8d44\u6e90\u7684\u65f6\u5019\u5e76\u6ca1\u6709\u6267\u884c\u91cc\u9762\u7684\u4ee3\u7801\u3002\u6bd4\u5982 \uff1a<\/p>\n
\/\/myscript.js\nalert(1)\n<\/code><\/pre>\n<link rel="preload" href="myscript.js" as="script">\n<\/code><\/pre>\n\u5f53\u4f7f\u7528\u6d4f\u89c8\u5668\u52a0\u8f7d\u65f6\uff0c\u5e76\u4e0d\u4f1a\u6709\u5f39\u7a97\u3002<\/p>\n
\n- \u82e5\u6b64\u65f6\u53d1\u751f\u9875\u9762\u5bfc\u822a\uff0cpreload \u8fdb\u884c\u4e2d\u7684\u8d44\u6e90\u4f1a\u88ab\u53d6\u6d88\u3002<\/li>\n<\/ol>\n
\u6d4f\u89c8\u5668\u4e2d\u5982\u4e0b\uff1a<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618353784169.jpg\")
<\/p>\n
<\/span><\/a>prefetch:<\/h3>\nprefetch \u662f\u63d0\u793a\u6d4f\u89c8\u5668\uff0c\u7528\u6237\u5728\u4e0b\u6b21\u5bfc\u822a\u65f6\u53ef\u80fd\u4f1a\u4f7f\u7528\u7684\u8d44\u6e90\uff0c\u56e0\u6b64\u6d4f\u89c8\u5668\u4e3a\u4e86\u63d0\u5347\u6027\u80fd\u53ef\u4ee5\u63d0\u524d\u52a0\u8f7d\u3001\u7f13\u5b58\u8d44\u6e90\u3002prefetch \u7684\u52a0\u8f7d\u4f18\u5148\u7ea7\u76f8\u5bf9\u8f83\u4f4e\u6d4f\u89c8\u5668\u5728\u7a7a\u95f2\u7684\u65f6\u5019\u624d\u4f1a\u5728\u540e\u53f0\u52a0\u8f7d\u3002<\/p>\n
\u4f7f\u7528\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n
<link rel="prefetch" href="\/myscript.js" as="script">\n\n<script>\nvar res = document.createElement("link");\nres.rel = "prefetch";\nres.as = "style";\nres.href = "styles\/other.css";\ndocument.head.appendChild(res);\n<\/script>\n<\/code><\/pre>\nLink: <https:\/\/example.com\/other\/styles.css>; rel=prefetch; as=style\n<\/code><\/pre>\n\u76f8\u5bf9\u4e8e preload \u800c prefetch \u5e94\u7528\u5728\u4e00\u4e2a\u4e0d\u540c\u7684\u573a\u666f\uff1a\u8de8\u5bfc\u822a\u3001\u8de8\u9875\u9762\u4f7f\u7528\u8d44\u6e90\uff0c\u4f8b\u5982\u9875\u9762 A \u521d\u59cb\u5316\u4e86\u4e00\u4e2a\u9875\u9762 B \u4e2d\u5173\u952e\u8d44\u6e90\u7684 prefetch \u8bf7\u6c42\uff0c\u5219\u5173\u952e\u8d44\u6e90\u7684\u52a0\u8f7d\u548c\u9875\u9762\u5bfc\u822a\u53ef\u4ee5\u5e76\u884c\u6267\u884c\uff0c\u4f46\u82e5\u662f preload \u5b83\u4f1a\u5728\u9875\u9762 A \u7684unload \u4e8b\u4ef6\u4e2d\u7acb\u5373\u53d6\u6d88\u3002<\/p>\n
prefetch \u7684\u6d4f\u89c8\u5668\u652f\u6301\u60c5\u51b5\uff1a<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618354353143.jpg\")
<\/p>\n
\u6ce8\u610f\uff1a<\/p>\n
\n- prefetch \u4f18\u5148\u7ea7\u8f83\u4f4e\uff0c\u6240\u4ee5\u52a0\u8f7d\u7684\u8d44\u6e90\u6709\u53ef\u80fd\u4f1a\u88ab\u53d6\u6d88\uff0c\u4f8b\u5982\uff1a\u5728\u7f51\u7edc\u5f88\u5dee\u7684\u65f6\u5019\uff0cprefetch \u4e00\u4e2a\u5927\u5b57\u4f53\u6587\u4ef6\u7684\u65f6\u5019\u5c31\u6709\u53ef\u80fd\u88ab\u53d6\u6d88\u3002<\/li>\n<\/ol>\n
\u6d4f\u89c8\u5668\u4e2d\u5982\u4e0b\uff1a<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618354444903.jpg\")
<\/p>\n
![\"\"](\"https:\/\/zhuxinyong.com\/wp-content\/uploads\/2022\/08\/16618354504747.jpg\")
<\/p>\n
\u53c2\u8003\uff1a<\/p>\n
\n- https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTML\/Preloading_content<\/a><\/li>\n
- https:\/\/css-tricks.com\/prefetching-preloading-prebrowsing\/<\/a><\/li>\n
- https:\/\/www.smashingmagazine.com\/2016\/02\/preload-what-is-it-good-for\/<\/a><\/li>\n
- https:\/\/medium.com\/reloading\/preload-prefetch-and-priorities-in-chrome-776165961bbf<\/a><\/li>\n
- https:\/\/www.keycdn.com\/blog\/resource-hints<\/a><\/li>\n
- https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTTP\/Link_prefetching_FAQ<\/a><\/li>\n
- https:\/\/w3c.github.io\/resource-hints<\/a><\/li>\n
- https:\/\/dev.to\/antjanus\/using-prefetch-and-caching-for-better-javascript-bundle-loading-2p56<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
\u76f8\u540c\u70b9\uff1a \u90fd\u662f\u4f1a\u63d0\u524d\u4e0b\u8f7d\u8d44\u6e90 \u4e0d\u540c\u70b9\uff1a preload \u662f\u8981\u6c42\u6d4f\u89c8\u5668\u5fc5\u987b\u53bb\u4e0b\u8f7d\uff0c\u4f18\u5148\u7ea7\u8f83\u9ad8\uff0c\u4e3a\u5f53\u524d\u9875...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,20,3],"tags":[213,215,214],"class_list":["post-1516","post","type-post","status-publish","format-standard","hentry","category-all","category-frontend","category-tech","tag-http","tag-prefetch","tag-preload"],"_links":{"self":[{"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/posts\/1516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1516"}],"version-history":[{"count":1,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":1517,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=\/wp\/v2\/posts\/1516\/revisions\/1517"}],"wp:attachment":[{"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhuxinyong.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}