{"id":12455,"date":"2026-10-30T19:47:48","date_gmt":"2026-10-30T11:47:48","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=12455"},"modified":"2026-10-30T19:47:48","modified_gmt":"2026-10-30T11:47:48","slug":"loading-lazy-img-sizes-auto","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2026\/10\/loading-lazy-img-sizes-auto\/","title":{"rendered":"\u61d2\u52a0\u8f7d\u56fe\u7247\u65b0\u652f\u6301\u4e86sizes=&#8221;auto&#8221;\u5c5e\u6027\uff0c\u5176\u4f5c\u7528\u662f\uff1f"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=12455\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=12455<\/a><br \/>\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\uff0cAI\u6293\u53d6\u4fdd\u7559\u539f\u6587\u5730\u5740\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<h3>\u4e00\u3001\u4e00\u6b65\u5230\u4f4d<\/h3>\n<p>\u4e00\u53e5\u8bdd\uff1a<code>sizes=\"auto\"<\/code> \u662f\u7ed9\u61d2\u52a0\u8f7d\u56fe\u7247\u7528\u7684\u65b0\u7279\u6027\uff0c\u6d4f\u89c8\u5668\u4e0d\u518d\u9700\u8981\u4f60\u624b\u5199\u5a92\u4f53\u67e5\u8be2\uff0c\u4f1a\u81ea\u52a8\u8bfb\u53d6\u56fe\u7247\u5e03\u5c40\u540e\u7684\u5b9e\u9645\u6e32\u67d3\u5bbd\u5ea6\uff0c\u53bb <code>srcset<\/code> \u91cc\u6311\u9009\u6700\u5408\u9002\u5c3a\u5bf8\u7684\u56fe\u7247\u3002<\/p>\n<p>\u5173\u4e8e<code>srcset<\/code>\u5c5e\u6027\uff0c\u6211\u5728\u4e4b\u524d\u7684\u6587\u7ae0\uff08<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2014\/10\/responsive-images-srcset-size-w-descriptor\/\">\u54cd\u5e94\u5f0f\u56fe\u7247srcset\u5168\u65b0\u91ca\u4e49sizes\u5c5e\u6027w\u63cf\u8ff0\u7b26<\/a>\uff09\uff0c\u4ee5\u53ca\u6211\u5199\u7684\u300aHTML\u5e76\u4e0d\u7b80\u5355\u300b\u8fd9\u672c\u4e66\u91cc\u9762\u90fd\u6709\u8fc7\u8be6\u7ec6\u7684\u4ecb\u7ecd\u3002<\/p>\n<p>\u6bd4\u65b9\u8bf4\u4e0b\u9762\u8fd9\u6bb5HTML\u4ee3\u7801\uff1a<\/p>\n<pre>&lt;img src=\"128px.jpg\"\r\n  srcset=\"128px.jpg 128w, 256px.jpg 256w, 512px.jpg 512w\"\r\n  sizes=\"(max-width: 480px) 100vw, 480px\"&gt;<\/pre>\n<p>\u6211\u95ee\u4f60\uff0ciPhone6\u4e0b\u52a0\u8f7d\u7684\u662f\u54ea\u5f20\u56fe\u7247\uff1f\u6e32\u67d3\u7684\u5bbd\u5ea6\u662f\u591a\u5c11\uff1f<\/p>\n<p>\u6709\u8c01\u56de\u7b54\u7684\u4e0a\u6765\uff01<\/p>\n<p>\u9700\u8981\u77e5\u9053iPhone6\u7684\u5c4f\u5e55\u5bc6\u5ea6\uff0c\u9700\u8981\u77e5\u9053\u4ed6\u7684\u5c3a\u5bf8\uff0c\u7136\u540e\u8ba1\u7b97\u4f7f\u7528\u54ea\u4e2a\u89c4\u683c\u7684\u56fe\u7247\u3002<\/p>\n<p>\u9ebb\u9ebb\u6279\u7684\uff0c\u6211\u81ea\u5df1\u90fd\u770b\u4e0d\u61c2\uff0c\u867d\u7136\u8fd9\u6bb5\u4ee3\u7801\u662f\u6211\u81ea\u5df1\u5199\u7684\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4f55\uff0c\u4ece\u4e1a\u5341\u51e0\u5e74\uff0c\u6211\u4ece\u6765\u6ca1\u6709\u5728\u54ea\u4e2a\u56fd\u5185\u7684\u9879\u76ee\u89c1\u8c01\u7528\u8fc7<code>srcset<\/code>\u548c<code>sizes<\/code>\u5c5e\u6027\u3002<\/p>\n<p>\u592a\u590d\u6742\uff0c\u592a\u5570\u55e6\uff0c\u6240\u4ee5\uff0c\u5927\u5bb6\u90fd\u662f\u76f4\u63a52\u500d\u56fe\uff0c3\u500d\u56fe\u4e00\u628a\u68ad\uff0c\u53cd\u6b63\u7528\u7684\u662f\u516c\u53f8\u6d41\u91cf\u3002<\/p>\n<p>\u73b0\u5728\u60c5\u51b5\u6709\u53d8\uff0c\u5728\u67d0\u4e9b\u6761\u4ef6\u4e0b\uff0c\u5f00\u53d1\u8005\u65e0\u9700\u53bb\u5173\u6ce8<code>sizes<\/code>\u7684<code>media<\/code>\u67e5\u8be2\u7ec6\u8282\u4e86\uff0c\u76f4\u63a5<code>sizes=\"auto\"<\/code>\u5c31\u53ef\u4ee5\u4e86\uff0c\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u9009\u62e9\u5408\u9002\u5c3a\u5bf8\u7684\u56fe\u7247\u53bb\u52a0\u8f7d\u3002<\/p>\n<p>\u90a3\u8fd9\u4e2a\u6761\u4ef6\u662f\u4ec0\u4e48\u5462\uff1f\u4e3a\u4ec0\u4e48\u6d4f\u89c8\u5668\u53ef\u4ee5\u81ea\u52a8\u9009\u62e9\u5c3a\u5bf8\uff1f<\/p>\n<h3>\u4e8c\u3001\u65e2\u7136\u662f\u61d2\u52a0\u8f7d\uff1f<\/h3>\n<p>\u8fd9\u4e2a\u6761\u4ef6\u5c31\u662f\u56fe\u7247\u9700\u8981\u8bbe\u7f6e<code>loading=\"lazy\"<\/code>\u3002<\/p>\n<p>\u8bbe\u7f6e\u4e86\u61d2\u52a0\u8f7d\u7684\u56fe\u7247\u9ed8\u8ba4\u4e0d\u662f\u7acb\u5373\u52a0\u8f7d\u7684\uff0c\u5bf9\u5427\uff0c\u9700\u8981\u56fe\u7247\u5143\u7d20\u6eda\u52a8\u5230\u89c6\u53e3\uff0c\u6216\u8005\u63a5\u8fd1\u89c6\u53e3\u7684\u65f6\u5019\uff08\u4e0e\u7f51\u901f\u3001\u5c4f\u5e55\u5c3a\u5bf8\u7b49\u6709\u5173\uff09\u624d\u5f00\u59cb\u52a0\u8f7d\u3002 <\/p>\n<p>\u6b64\u65f6\u9875\u9762\u7684 CSS \u65e9\u5c31\u89e3\u6790\u5b8c\u6bd5\uff0c\u56fe\u7247\u5728\u5e03\u5c40\u4e2d\u7684\u51c6\u786e\u5bbd\u5ea6\u6d4f\u89c8\u5668\u65e9\u5c31\u77e5\u9053\u4e86\u3002<\/p>\n<p>\u65e2\u7136\u5c3a\u5bf8\u90fd\u77e5\u9053\u4e86\uff0c\u90a3\u4e48\u4e0d\u5c31\u53ef\u4ee5\u540e\u81ea\u52a8\u5339\u914d\u5bf9\u5e94\u7684<code>srcset<\/code>\u8d44\u6e90\u4e86\uff1f<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4f55<code>sizes=\"auto\"<\/code>\u9700\u8981\u56fe\u7247\u662f\u61d2\u52a0\u8f7d\u7684\u539f\u56e0\u3002<\/p>\n<p><strong>\u8865\u5145\u8bf4\u660e<\/strong><\/p>\n<p>\u56fe\u7247\u9664\u4e86\u5fc5\u987b\u662f\u61d2\u52a0\u8f7d\u7684\uff0c\u8fd8\u9700\u8981\u663e\u5f0f\u6307\u5b9a width \u548c height\uff08\u6216\u901a\u8fc7 CSS \u9650\u5236\u5bbd\u9ad8\uff09\uff0c\u6216\u8005\u6307\u5b9a\u4e00\u4fa7\u9ad8\u5ea6\uff0c\u7136\u540e\u4f7f\u7528<code>aspect-ratio<\/code>\u5c5e\u6027\u7ea6\u675f\u597d\u6bd4\u4f8b\u3002<\/p>\n<h3>\u4e09\u3001\u5662\u5566\uff0c\u5c31\u8fd9\u4e48\u70b9\u5185\u5bb9<\/h3>\n<p><code>&lt;img sizes=\"auto\" loading=\"lazy\"&gt;<\/code>\u8fd8\u662f\u4e2a\u65b0\u7279\u6027\uff0c\u6211\u770b\u4e86\u4e0b\uff0cSafari\u5c45\u7136\u8fd8\u6ca1\u6709\u652f\u6301\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202610\/2026-10-30_192226.png\" width=\"575\" height=\"396\" alt=\"size=auto\u517c\u5bb9\u6027\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u5509\uff0c\u65e0\u6240\u8c13\u4e86\uff0c\u4e0d\u652f\u6301\u5c31\u4e0d\u652f\u6301\u5427\uff0c\u53cd\u6b63\u4e0d\u5f71\u54cd\u56fe\u7247\u6b63\u5e38\u663e\u793a\uff0c\u5230\u65f6\u5019<code>src<\/code>\u968f\u4fbf\u7ed9\u4e2a\u4e24\u500d\u56fe\u5c31\u597d\u4e86\u3002<\/p>\n<p>\u81f3\u4e8e<code>srcset<\/code>\u5c5e\u6027\u7684\u4f7f\u7528\u7a8d\u95e8\u90a3\u5c31\u7b80\u5355\u4e86\uff0c\u539f\u56fe\u5bbd\u5ea6\u662f\u591a\u5c11\u50cf\u7d20\uff0c\u540e\u9762\u5c31\u5199\u591a\u5c11<code>w<\/code>\uff0c\u6bd4\u65b9\u8bf4\uff1a<\/p>\n<pre>&lt;img loading=\"lazy\" \r\n  sizes=\"auto\" \r\n  srcset=\"img-300.jpg 300w, img-600.jpg 600w, img-1200.jpg 1200w\" \r\n  src=\"img-600.jpg\" \r\n  width=\"600\" \r\n  height=\"400\"\r\n\/&gt;<\/pre>\n<p>\u5f53\u7136\uff0c\u7701\u6d41\u91cf\u8fd8\u6709\u5176\u4ed6\u66f4\u597d\u7684\u65b9\u5f0f\uff0c\u6bd4\u65b9\u8bf4jpg\u683c\u5f0f\u6362\u6210webp\uff0c\u5982\u679c\u6761\u4ef6\u5141\u8bb8\uff0c\u6700\u597d\u6362\u6210avif\u683c\u5f0f\uff0c\u8fd9\u4e2a\u624d\u662f\u517c\u987e\u89c6\u89c9\u6548\u679c\u548c\u6587\u4ef6\u5927\u5c0f\u7684\u738b\u724c\u683c\u5f0f\uff0c\u540c\u753b\u8d28\u4e0b\uff0c\u6bd4webp\u5c0f20%~30%\u7684\u4f53\u79ef\uff0c\u548cjpg\u683c\u5f0f\u76f8\u6bd4\uff0c\u66f4\u662f\u51cf\u534a\u4e0d\u6b62\u3002<\/p>\n<p>\u76ee\u524d\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301avif\u683c\u5f0f\u4e86\uff0c\u5927\u5bb6\u6709\u5174\u8da3\u53ef\u4ee5\u591a\u591a\u5173\u6ce8\u3002<\/p>\n<p>\u6bd4\u7814\u7a76<code>srcset<\/code>\u8fd9\u6837\u7ec6\u8282\u7684\u77e5\u8bc6\u5bf9\u4ea7\u54c1\u6d41\u91cf\u7684\u589e\u76ca\u5927\u591a\u4e86\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u672c\u6587\u7684\u5185\u5bb9\u5e76\u4e0d\u662f\u4e00\u65e0\u662f\u5904\uff0c\u53cd\u6b63\u73b0\u5728\u6709AI\uff0c\u56de\u5934\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u8ba9AI\u81ea\u52a8\u751f\u6210\u591a\u5c3a\u5bf8\u56fe\u7247\uff08\u4ee5\u524d\u591a\u534a\u8981\u624b\u52a8\u5904\u7406\uff09\uff0c\u4f7f\u7528<code>srcset<\/code>\u5c5e\u6027\u8c03\u7528\uff0c\u4e5f\u53ef\u4ee5\u3002<\/p>\n<p>\u6bd5\u7adf\u4ee5\u524d\u5b9e\u73b0\u7c7b\u4f3c\u4e1c\u897f\u8981\u70e7\u8111\u5b50\uff0c\u73b0\u5728\u53ea\u8981\u70e7token\uff0c\u5f00\u53d1\u6210\u672c\u4e0d\u53ef\u540c\u65e5\u800c\u8bed\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u5c31\u8bf4\u8fd9\u4e48\u591a\u3002<\/p>\n<p>\u987a\u4fbf\u6c47\u62a5\u4e0b\u4e4b\u524d\u8bf4\u7684\u5728\u7ebf\u524d\u7aef\u8bfe\u7a0b\uff0c\u5df2\u7ecf\u5199\u5230\u7ae0\u82822.5\u4e86\uff0c\u9605\u8bfb\u7ea6\u83ab20~30%\u7684\u6837\u5b50\u5427\u3002<\/p>\n<p>\u518d\u5199\u51e0\u4e2a\u5c0f\u8282\uff0c\u5c31\u53ef\u4ee5\u627e\u7f16\u8f91\u770b\u770b\u80fd\u4e0d\u80fd\u7b7e\u7ea6\u4e86\uff0c\u8c08\u5206\u6210\u4e4b\u7c7b\u7684\u3002<\/p>\n<p>\u80a1\u7968\u8dcc\u6ca1\u4e86\uff0c\u5f97\u627e\u70b9\u8def\u5b50\u8d5a\u70b9\u96f6\u82b1\u94b1\u8865\u8d34\u5bb6\u7528\u4e86\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202610\/2026-10-30_193200.webp\" width=\"108\" height=\"115\" alt=\"\u592a\u60e8\u4e86\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=12455\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=12455<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202610\/2026-10-30_193746.webp\" width=\"160\" height=\"95\" alt=\"size=auto\u5c01\u9762\u5360\u4f4d\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u592a\u4e0d\u5bb9\u6613\u4e86\uff0c\u7ec8\u4e8e\u4e0d\u9700\u8981\u5728&lt;img&gt;\u5143\u7d20\u7684sizes\u5c5e\u6027\u91cc\u9762\u5199\u5a92\u4f53\u67e5\u8be2\u4e86\uff0cauto\u5173\u952e\u5b57\u5d2d\u65b0\u6765\u88ad\uff0c\u53ea\u8981\u662f\u61d2\u52a0\u8f7d\u56fe\u7247\uff0c\u6d4f\u89c8\u5668\u81ea\u52a8\u5224\u522b\u4f7f\u7528\u54ea\u4e00\u4e2asrcset\u56fe\u7247\uff0c\u6bd4\u4ee5\u524d\u7701\u5fc3\u591a\u4e86\u3002\u4ec0\u4e48\uff0c\u4e0d\u77e5\u9053\u6211\u53fd\u91cc\u5495\u565c\u8bf4\u7684\u5565\uff1f\u70b9\u8fdb\u6765\u770b\u770b\u4e0d\u5c31\u77e5\u9053\u4e86\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1097],"tags":[1586,1498,1008,950,949,75],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/12455"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=12455"}],"version-history":[{"count":4,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/12455\/revisions"}],"predecessor-version":[{"id":12496,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/12455\/revisions\/12496"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=12455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=12455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=12455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}