{"id":10316,"date":"2022-04-22T14:28:29","date_gmt":"2022-04-22T06:28:29","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=10316"},"modified":"2022-04-22T14:28:29","modified_gmt":"2022-04-22T06:28:29","slug":"css-sticky-size-change","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2022\/04\/css-sticky-size-change\/","title":{"rendered":"CSS\u5b9e\u73b0\u6eda\u52a8\u9ad8\u5ea6\u81ea\u52a8\u53d8\u5c0f\u7684\u7c98\u6ede\u6548\u679c"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=10316\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=10316<\/a> \u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\u4e0e\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u5c31\u4e0d\u5fc5\u4e86\uff0c\u5c0a\u91cd\u7248\u6743\uff0c\u5708\u5b50\u5c31\u8fd9\u4e48\u5927\uff0c\u82e5\u6025\u7528\u53ef\u4ee5\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202204-sticky-header.png';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202204\/cat-cover.png\" width=\"480\" height=\"306\" alt=\"\u732b\u4e0e\u82b1\" class=\"alignright clip thumb size-medium\" \/><\/p>\n<h3>\u4e00\u3001\u5148\u770b\u4e0b\u6548\u679c<\/h3>\n<p>\u5982\u4e0b MP4 \u89c6\u9891\u793a\u610f\uff08\u4e0d\u52a8\u70b9\u51fb\u64ad\u653e\uff09\uff0c\u53ef\u4ee5\u770b\u5230\u9ed8\u8ba4\u9875\u9762\u7684 header \u5934\u90e8\u5143\u7d20\u9ad8\u5ea6\u633a\u9ad8\u7684\uff0c\u968f\u7740\u6eda\u52a8\u7684\u8fdb\u884c\uff0c\u5934\u90e8\u56fa\u5b9a\u5b9a\u4f4d\u4e86\uff0c\u540c\u65f6\u9ad8\u5ea6\u4e5f\u53d8\u5c0f\u4e86\uff0c\u51cf\u5c0f\u5bf9\u9875\u9762\u9ad8\u5ea6\u7684\u5360\u7528\u3002<\/p>\n<p><video src='\/\/image.zhangxinxu.com\/video\/blog\/202204\/header-sticky.mp4' type=\"video\/mp4\" width=\"372\" height=\"668\" preload=\"auto\" autoplay autobuffer loop x-webkit-airplay=\"allow\" x5-video-player-type=\"h5\" x5-video-player-fullscreen=\"true\" x5-video-orientation=\"portraint\" webkit-playsinline=\"true\" playsinline=\"true\" \u200b\u200b\u200b\u200bposter=\"\/\/image.zhangxinxu.com\/image\/blog\/201806\/poster.png\"><\/video><\/p>\n<p>\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/study\/202204\/css-both-sticky-header-demo.html\" rel=\"noopener\" target=\"_blank\">\u5934\u90e8\u6807\u9898\u5bfc\u822a\u9ad8\u5ea6\u81ea\u52a8\u4f38\u7f29demo<\/a><\/p>\n<p>\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f<\/p>\n<h3>\u4e8c\u3001\u53cc Sticky \u7c98\u6027\u5b9a\u4f4d<\/h3>\n<p>\u9700\u8981\u60ac\u6d6e\u56fa\u5b9a\u7684\u5143\u7d20\u5185\u5916\u4e24\u5c42\u5d4c\u5957\uff0c\u5047\u8bbe\u5982\u4e0bHTML\u4ee3\u7801\uff1a<\/p>\n<pre>&lt;header&gt;\r\n    &lt;header-inner&gt;\r\n        ...\r\n    &lt;\/header-inner&gt;\r\n&lt;\/header&gt;<\/pre>\n<p>\u5219\u6838\u5fc3\u7684 CSS \u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<pre>header {\r\n    --height-outer: 120px;\r\n    --height-inner: 60px;\r\n    \/* by zhangxinxu *\/\r\n    display: flex;\r\n    align-items: center;\r\n    position: sticky;\r\n    height: var(--height-outer);\r\n    top: calc(var(--height-inner) - var(--height-outer));\r\n}\r\nheader-inner {\r\n    display: flex;\r\n    line-height: var(--height-inner);\r\n    position: sticky;\r\n    top: 0; 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