{"id":305931,"date":"2024-05-20T19:57:55","date_gmt":"2024-05-20T11:57:55","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/305931.html"},"modified":"2024-05-20T19:58:03","modified_gmt":"2024-05-20T11:58:03","slug":"%e5%89%8d%e7%ab%af-js-%e4%bb%a3%e7%a0%81%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e9%a1%b5%e9%9d%a2%e6%bb%9a%e5%8a%a8%e8%80%8c%e5%85%83%e7%b4%a0%e4%bd%8d%e7%bd%ae%e4%b8%8d%e5%8f%98-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/305931.html","title":{"rendered":"\u524d\u7aef js \u4ee3\u7801\u5982\u4f55\u5b9e\u73b0\u9875\u9762\u6eda\u52a8\u800c\u5143\u7d20\u4f4d\u7f6e\u4e0d\u53d8"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26222305\/da1cfcd3-88d0-4ac0-a479-664760fbfa71.webp\" alt=\"\u524d\u7aef js \u4ee3\u7801\u5982\u4f55\u5b9e\u73b0\u9875\u9762\u6eda\u52a8\u800c\u5143\u7d20\u4f4d\u7f6e\u4e0d\u53d8\" \/><\/p>\n<p><p>\u6eda\u52a8\u56fa\u5b9a\uff08Sticky Positioning\uff09\u662f\u4e00\u79cd\u7f51\u9875\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u5143\u7d20\u5728\u9875\u9762\u6eda\u52a8\u8fc7\u7a0b\u4e2d\u4fdd\u6301\u5728\u89c6\u53e3\u5185\u7684\u7279\u5b9a\u4f4d\u7f6e\u3002\u8981\u5b9e\u73b0\u8fd9\u4e00\u6548\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528CSS\u5c5e\u6027<code>position: sticky;<\/code>\u3001<strong>\u5229\u7528JavaScript\u76d1\u542c\u6eda\u52a8\u4e8b\u4ef6<\/strong>\u3001\u901a\u8fc7CSS\u7684<code>position: fixed;<\/code>\u7b49\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><p>\u8f83\u4e3a\u7b80\u5355\u4e14\u5e7f\u6cdb\u4f7f\u7528\u7684\u65b9\u6cd5\u662f\u5e94\u7528<code>position: sticky;<\/code>\u5c5e\u6027\u3002\u8fd9\u4e2a\u5c5e\u6027\u4f7f\u5143\u7d20\u57fa\u4e8e\u7528\u6237\u7684\u6eda\u52a8\u4f4d\u7f6e\u76f8\u5bf9\u56fa\u5b9a\u3002\u901a\u5e38\u914d\u5408<code>top<\/code>, <code>right<\/code>, <code>bottom<\/code>, <code>left<\/code>\u8fd9\u4e9b\u504f\u79fb\u5c5e\u6027\u6765\u6307\u5b9a\u5143\u7d20\u8ddd\u79bb\u89c6\u53e3\u7684\u8fb9\u754c\u3002\u4e0d\u8fc7\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f<code>sticky<\/code>\u5b9a\u4f4d\u5728\u5143\u7d20\u7684\u7236\u5143\u7d20\u88ab\u6eda\u51fa\u89c6\u7a97\u65f6\u5e76\u4e0d\u8d77\u4f5c\u7528\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001CSS\u4e2d\u7684Sticky\u5b9a\u4f4d<\/h3>\n<\/p>\n<p><h4><strong>\u57fa\u7840\u6982\u5ff5\u548c\u7528\u6cd5<\/strong><\/h4>\n<\/p>\n<p><p>Sticky\u5b9a\u4f4d\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684CSS\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">.element {<\/p>\n<p>  position: -webkit-sticky;<\/p>\n<p>  position: sticky;<\/p>\n<p>  top: 0;<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8be5<code>.element<\/code>\u7c7b\u5e94\u7528\u4e8e\u9700\u8981\u5728\u6eda\u52a8\u65f6\u4fdd\u6301\u4f4d\u7f6e\u4e0d\u53d8\u7684\u5143\u7d20\u4e0a\u3002<code>top: 0;<\/code>\u610f\u5473\u7740\u5143\u7d20\u5c06\u5728\u8ddd\u79bb\u89c6\u7a97\u9876\u90e80\u50cf\u7d20\u5904\u201c\u56fa\u5b9a\u201d\u3002<\/p>\n<\/p>\n<p><h4><strong>\u517c\u5bb9\u6027\u548c\u6ce8\u610f\u4e8b\u9879<\/strong><\/h4>\n<\/p>\n<p><p>\u7136\u800c\uff0c\u4f7f\u7528<code>position: sticky;<\/code>\u9700\u8981\u6ce8\u610f\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u5e76\u4e14\u786e\u4fdd\u6eda\u52a8\u5bb9\u5668\u7684\u9ad8\u5ea6\u8db3\u4ee5\u4f7f\u5143\u7d20\u6eda\u51fa\u89c6\u91ce\u3002\u7236\u5143\u7d20\u4e0d\u80fd\u6709<code>overflow<\/code>\u88ab\u8bbe\u7f6e\u4e3a<code>hidden<\/code>\u6216<code>auto<\/code>\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u963b\u6b62<code>sticky<\/code>\u5b9a\u4f4d\u7684\u5de5\u4f5c\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001JavaScript\u4e2d\u7684\u6eda\u52a8\u76d1\u542c<\/h3>\n<\/p>\n<p><h4><strong>\u5b9e\u73b0\u56fa\u5b9a\u5b9a\u4f4d<\/strong><\/h4>\n<\/p>\n<p><p>JavaScript\u53ef\u4ee5\u901a\u8fc7\u76d1\u542c\u6eda\u52a8\u4e8b\u4ef6\u6765\u6539\u53d8\u5143\u7d20\u7684\u5b9a\u4f4d\uff0c\u4f7f\u5176\u5728\u6eda\u52a8\u65f6\u4fdd\u6301\u56fa\u5b9a\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">window.addEventListener(&#039;scroll&#039;, function() {<\/p>\n<p>  var element = document.getElementById(&#039;your-element-id&#039;);<\/p>\n<p>  var scrollPosition = window.pageYOffset;<\/p>\n<p>  if (scrollPosition &gt; element.offsetTop) {<\/p>\n<p>    element.style.position = &#039;fixed&#039;;<\/p>\n<p>    element.style.top = &#039;0&#039;;<\/p>\n<p>  } else {<\/p>\n<p>    element.style.position = &#039;relative&#039;;<\/p>\n<p>  }<\/p>\n<p>});<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u4f18\u5316\u6027\u80fd<\/strong><\/h4>\n<\/p>\n<p><p>\u5f53\u9875\u9762\u6eda\u52a8\u65f6\uff0c<code>scroll<\/code>\u4e8b\u4ef6\u53ef\u80fd\u4f1a\u88ab\u9ad8\u9891\u89e6\u53d1\uff0c\u4ece\u800c\u5f71\u54cd\u6027\u80fd\u3002\u5bf9\u6b64\uff0c\u5e38\u89c1\u7684\u4f18\u5316\u624b\u6bb5\u5305\u62ec\u8282\u6d41\uff08throttling\uff09\u6216\u9632\u6296\uff08debouncing\uff09\u6765\u51cf\u5c11\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u8c03\u7528\u9891\u7387\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u5229\u7528CSS\u7684Fixed\u5b9a\u4f4d<\/h3>\n<\/p>\n<p><h4><strong>\u56fa\u5b9a\u4f4d\u7f6e\u7684\u5b9e\u73b0<\/strong><\/h4>\n<\/p>\n<p><p>Before CSS <code>sticky<\/code> positioning was widely supported, <code>position: fixed;<\/code> was often used to keep an element in the same place on the screen:<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">.element {<\/p>\n<p>  position: fixed;<\/p>\n<p>  top: 0;<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f46\u662f\u4f7f\u7528<code>fixed<\/code>\u5b9a\u4f4d\u4f1a\u4f7f\u5143\u7d20\u8131\u79bb\u6587\u6863\u7684\u6d41\uff0c\u6240\u4ee5\u53ef\u80fd\u9700\u8981\u989d\u5916\u7684\u6837\u5f0f\u8c03\u6574\u6765\u4fdd\u6301\u9875\u9762\u5e03\u5c40\u3002<\/p>\n<\/p>\n<p><h4><strong>\u4e0e\u5176\u4ed6\u5143\u7d20\u7684\u4e92\u52a8<\/strong><\/h4>\n<\/p>\n<p><p>\u56fa\u5b9a\u5143\u7d20\u53ef\u80fd\u4f1a\u4e0e\u5176\u4ed6\u9875\u9762\u5143\u7d20\u91cd\u53e0\u3002\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u65f6\u8981\u8003\u8651\u5230\u5176\u4e0e\u9875\u9762\u5176\u4ed6\u90e8\u5206\u7684\u4ea4\u4e92\uff0c\u53ef\u80fd\u9700\u8981\u6dfb\u52a0<code>z-index<\/code>\u5c42\u7ea7\u63a7\u5236\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u5b9e\u73b0\u6eda\u52a8\u56fa\u5b9a\u7684\u9ad8\u7ea7\u6280\u5de7\u548c\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n<p><h4><strong>\u54cd\u5e94\u5f0f\u8bbe\u8ba1<\/strong><\/h4>\n<\/p>\n<p><p>\u5728\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u4e2d\uff0c\u5143\u7d20\u7684\u56fa\u5b9a\u5b9a\u4f4d\u53ef\u80fd\u9700\u8981\u6839\u636e\u4e0d\u540c\u5c4f\u5e55\u5927\u5c0f\u8fdb\u884c\u8c03\u6574\u3002\u4f7f\u7528\u5a92\u4f53\u67e5\u8be2\uff08Media Queries\uff09\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">@media (min-width: 600px) {<\/p>\n<p>  .element {<\/p>\n<p>    position: sticky;<\/p>\n<p>    top: 10px;<\/p>\n<p>  }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u4ea4\u53c9\u89c2\u5bdf\u5668(Intersection Observer)<\/strong><\/h4>\n<\/p>\n<p><p>\u73b0\u4ee3\u6d4f\u89c8\u5668\u652f\u6301\u4f7f\u7528Intersection Observer API\u6765\u521b\u5efa\u66f4\u52a0\u6d41\u7545\u548c\u9ad8\u6548\u7684\u56fa\u5b9a\u6548\u679c\uff0c\u5b83\u53ef\u4ee5\u5f02\u6b65\u76d1\u6d4b\u76ee\u6807\u5143\u7d20\u4e0e\u5176\u7956\u5148\u5143\u7d20\u6216\u9876\u7ea7\u6587\u6863\u89c6\u7a97\uff08viewport\uff09\u7684\u4ea4\u53c9\u72b6\u6001\u3002<\/p>\n<\/p>\n<p><p>\u5b9e\u73b0\u9875\u9762\u4e0a\u7684\u5143\u7d20\u5728\u6eda\u52a8\u65f6\u4f4d\u7f6e\u56fa\u5b9a\u662f\u524d\u7aef\u5f00\u53d1\u4e2d\u4e00\u9879\u5e38\u89c1\u4e14\u6709\u7528\u7684\u6280\u672f\u3002\u5b83\u4e0d\u4ec5\u6539\u5584\u4e86\u7528\u6237\u4f53\u9a8c\uff0c\u800c\u4e14\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e9b\u521b\u65b0\u7684\u9875\u9762\u8bbe\u8ba1\u3002\u65e0\u8bba\u662f\u4f7f\u7528\u7eafCSS\u8fd8\u662f\u7ed3\u5408JavaScript\uff0c\u90fd\u80fd\u591f\u8f7b\u677e\u5b9e\u73b0\u5143\u7d20\u5728\u9875\u9762\u6eda\u52a8\u65f6\u7684\u56fa\u5b9a\u6548\u679c\u3002\u5728\u8bbe\u8ba1\u8fd9\u4e00\u529f\u80fd\u65f6\uff0c\u5f00\u53d1\u8005\u8981\u6ce8\u610f\u6d4f\u89c8\u5668\u7684\u517c\u5bb9\u6027\u3001\u9875\u9762\u6027\u80fd\u548c\u4e0e\u5176\u4ed6\u9875\u9762\u5143\u7d20\u7684\u534f\u8c03\u3002\u968f\u7740\u524d\u7aef\u6280\u672f\u7684\u53d1\u5c55\uff0c\u8fd9\u4e9b\u5b9e\u73b0\u56fa\u5b9a\u4f4d\u7f6e\u7684\u65b9\u6cd5\u4ecd\u5728\u4e0d\u65ad\u8fdb\u5316\uff0c\u63d0\u4f9b\u4e86\u66f4\u591a\u9ad8\u7ea7\u548c\u7b80\u4fbf\u7684\u9009\u9879\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u5982\u4f55\u4f7f\u7528\u524d\u7aef JavaScript \u5b9e\u73b0\u9875\u9762\u6eda\u52a8\u65f6\u5143\u7d20\u4f4d\u7f6e\u56fa\u5b9a\u4e0d\u53d8\uff1f<\/strong><\/p>\n<p>\u95ee\u9898\u662f\u6211\u60f3\u8981\u5b9e\u73b0\u4e00\u4e2a\u6548\u679c\uff0c\u5373\u5728\u6eda\u52a8\u9875\u9762\u65f6\uff0c\u67d0\u4e2a\u5143\u7d20\u7684\u4f4d\u7f6e\u4fdd\u6301\u56fa\u5b9a\u4e0d\u53d8\uff0c\u4e0d\u968f\u9875\u9762\u6eda\u52a8\u800c\u79fb\u52a8\u3002\u8fd9\u6837\u53ef\u4ee5\u5728\u9875\u9762\u6eda\u52a8\u8fc7\u7a0b\u4e2d\u4fdd\u6301\u67d0\u4e2a\u5143\u7d20\u7684\u53ef\u89c1\u6027\u548c\u7a33\u5b9a\u6027\uff0c\u63d0\u9ad8\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<p>\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u65b9\u6cd5\u4e4b\u4e00\u662f\u4f7f\u7528 JavaScript \u6765\u5b9e\u73b0\u9875\u9762\u6eda\u52a8\u4e8b\u4ef6\u7684\u76d1\u542c\uff0c\u7136\u540e\u901a\u8fc7\u64cd\u4f5c\u5143\u7d20\u7684 CSS \u6837\u5f0f\u6765\u56fa\u5b9a\u5176\u4f4d\u7f6e\u3002\u5177\u4f53\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li><strong>\u76d1\u542c\u9875\u9762\u7684\u6eda\u52a8\u4e8b\u4ef6<\/strong>\uff1a\u4f7f\u7528 JavaScript \u7ed1\u5b9a\u4e00\u4e2a\u6eda\u52a8\u4e8b\u4ef6\u7684\u76d1\u542c\u5668\uff0c\u5f53\u9875\u9762\u53d1\u751f\u6eda\u52a8\u65f6\u89e6\u53d1\u76f8\u5173\u903b\u8f91\u3002<\/li>\n<li><strong>\u83b7\u53d6\u9700\u8981\u56fa\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20<\/strong>\uff1a\u4f7f\u7528 JavaScript \u7684 DOM \u64cd\u4f5c\u65b9\u6cd5\u83b7\u53d6\u9700\u8981\u5b9e\u73b0\u56fa\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20\u3002<\/li>\n<li><strong>\u83b7\u53d6\u5143\u7d20\u7684\u521d\u59cb\u4f4d\u7f6e<\/strong>\uff1a\u83b7\u53d6\u5143\u7d20\u5728\u9875\u9762\u4e2d\u7684\u521d\u59cb\u4f4d\u7f6e\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>offsetTop<\/code> \u548c <code>offsetLeft<\/code> 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0;<\/code>\uff0c\u4f7f\u5143\u7d20\u7684\u65b0\u4f4d\u7f6e\u751f\u6548\u3002<\/li>\n<\/ol>\n<p>\u8fd9\u6837\uff0c\u5f53\u9875\u9762\u6eda\u52a8\u65f6\uff0c\u8be5\u5143\u7d20\u7684\u4f4d\u7f6e\u5c06\u4fdd\u6301\u56fa\u5b9a\u4e0d\u53d8\uff0c\u5b9e\u73b0\u4e86\u6eda\u52a8\u800c\u4e0d\u5f71\u54cd\u5143\u7d20\u4f4d\u7f6e\u7684\u6548\u679c\u3002<\/p>\n<p><strong>\u5982\u4f55\u5b9e\u73b0\u524d\u7aef\u9875\u9762\u6eda\u52a8\u65f6\u90e8\u5206\u5143\u7d20\u60ac\u6d6e\u5728\u9875\u9762\u9876\u90e8\uff1f<\/strong><\/p>\n<p>\u95ee\u9898\u662f\u6211\u5e0c\u671b\u5728\u9875\u9762\u6eda\u52a8\u8fc7\u7a0b\u4e2d\uff0c\u67d0\u4e2a\u5143\u7d20\u59cb\u7ec8\u60ac\u6d6e\u5728\u9875\u9762\u7684\u9876\u90e8\uff0c\u4ee5\u4fbf\u7528\u6237\u5728\u6d4f\u89c8\u9875\u9762\u65f6\u53ef\u4ee5\u968f\u65f6\u8bbf\u95ee\u8be5\u5143\u7d20\u3002<\/p>\n<p>\u5b9e\u73b0\u8fd9\u4e2a\u6548\u679c\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 JavaScript 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