{"id":95173,"date":"2026-08-16T12:48:58","date_gmt":"2026-08-16T04:48:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/95173.html"},"modified":"2026-08-16T12:48:58","modified_gmt":"2026-08-16T04:48:58","slug":"%e4%b8%80%e3%80%81%e6%b5%8f%e8%a7%88%e5%99%a8%e6%b8%b2%e6%9f%93%e6%b5%81%e6%b0%b4%e7%ba%bf","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/95173.html","title":{"rendered":"\u4e00\u3001\u6d4f\u89c8\u5668\u6e32\u67d3\u6d41\u6c34\u7ebf"},"content":{"rendered":"<h2>\u4e00\u3001\u6e32\u67d3\u6d41\u7a0b<\/h2>\n<p>\u628a\u6574\u4e2a\u8fc7\u7a0b\u60f3\u8c61\u6210\u201c\u4f60\u5728\u7f51\u4e0a\u70b9\u4e86\u4e00\u4efd\u5916\u5356&#xff0c;\u4ece\u4e0b\u5355\u5230\u5403\u8fdb\u5634\u91cc\u201d\u7684\u5168\u8fc7\u7a0b\u3002 \u6574\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u9636\u6bb5&#xff1a;\u7f51\u7edc\u5c42&#xff08;\u627e\u5916\u5356\u3001\u7b49\u5916\u5356&#xff09; \u548c \u6e32\u67d3\u5c42&#xff08;\u62c6\u5305\u88c5\u3001\u6446\u76d8\u5403&#xff09;\u3002\u8003\u8651\u5230\u4f60\u63d0\u5230\u7684\u5404\u79cd\u7279\u6b8a\u60c5\u51b5&#xff0c;\u6211\u4e3a\u4f60\u8be6\u7ec6\u68b3\u7406\u5982\u4e0b&#xff1a;<\/p>\n<h4>\u7b2c\u4e00\u9636\u6bb5&#xff1a;\u7f51\u7edc\u5c42&#xff08;\u627e\u5916\u5356\u3001\u7b49\u5916\u5356&#xff09;<\/h4>\n<h4>1. URL \u89e3\u6790\u4e0e\u5bfc\u822a&#xff08;\u786e\u8ba4\u5916\u5356\u5730\u5740&#xff09;<\/h4>\n<p>\u5f53\u4f60\u6572\u4e0b\u7f51\u5740&#xff08;\u5982 https:\/\/www.example.com&#xff09;\u5e76\u6309\u4e0b\u56de\u8f66\u65f6&#xff0c;\u6d4f\u89c8\u5668\u9996\u5148\u8981\u201c\u5ba1\u9898\u201d&#xff1a;<\/p>\n<ul>\n<li>URL \u5408\u6cd5\u5417&#xff1f; \u6d4f\u89c8\u5668\u4f1a\u68c0\u67e5\u4f60\u8f93\u5165\u7684\u5230\u5e95\u662f\u7f51\u5740\u8fd8\u662f\u641c\u7d22\u8bcd\u3002\u5982\u679c\u683c\u5f0f\u4e0d\u5bf9&#xff0c;\u5b83\u53ef\u80fd\u4f1a\u81ea\u52a8\u5e2e\u4f60\u8865\u5168&#xff08;\u6bd4\u5982\u52a0\u4e0a https:\/\/&#xff09;&#xff0c;\u6216\u8005\u76f4\u63a5\u5f53\u6210\u641c\u7d22\u8bcd\u4e22\u7ed9\u641c\u7d22\u5f15\u64ce\u3002<\/li>\n<li>\u5b89\u5168\u62e6\u622a&#xff1a; \u6d4f\u89c8\u5668\u8fd8\u4f1a\u68c0\u67e5\u8fd9\u4e2a\u7f51\u5740\u662f\u4e0d\u662f\u5df2\u77e5\u7684\u6076\u610f\u7f51\u7ad9&#xff0c;\u5982\u679c\u662f&#xff0c;\u5c31\u4f1a\u5f39\u51fa\u8b66\u544a\u9875\u9762\u3002<\/li>\n<\/ul>\n<h4>2. DNS \u57df\u540d\u89e3\u6790&#xff08;\u67e5\u7535\u8bdd\u7c3f&#xff09;<\/h4>\n<p>\u7535\u8111\u53ea\u8ba4 IP \u5730\u5740&#xff08;\u5982 192.168.1.1&#xff09;&#xff0c;\u4e0d\u8ba4\u8bc6\u7f51\u5740\u3002\u6240\u4ee5\u6d4f\u89c8\u5668\u8981\u5f00\u59cb\u201c\u67e5\u7535\u8bdd\u7c3f\u201d&#xff1a;<\/p>\n<ul>\n<li>\u7f13\u5b58\u547d\u4e2d&#xff08;\u79d2\u67e5&#xff09;&#xff1a; \u6d4f\u89c8\u5668\u4f1a\u5148\u67e5\u81ea\u5df1\u7684\u7f13\u5b58&#xff0c;\u518d\u67e5\u64cd\u4f5c\u7cfb\u7edf\u7684\u7f13\u5b58\u3002\u5982\u679c\u6700\u8fd1\u521a\u8bbf\u95ee\u8fc7&#xff0c;\u76f4\u63a5\u62ff\u5230 IP&#xff0c;\u901f\u5ea6\u6781\u5feb\u3002<\/li>\n<li>\u7f13\u5b58\u672a\u547d\u4e2d&#xff08;\u9010\u7ea7\u95ee\u8def&#xff09;&#xff1a; \u5982\u679c\u7f13\u5b58\u91cc\u6ca1\u6709&#xff0c;\u6d4f\u89c8\u5668\u5c31\u4f1a\u53bb\u95ee\u672c\u5730 DNS \u670d\u52a1\u5668&#xff08;\u901a\u5e38\u662f\u4f60\u7684\u5bbd\u5e26\u8fd0\u8425\u5546&#xff09;&#xff0c;\u5982\u679c\u5b83\u4e5f\u4e0d\u77e5\u9053&#xff0c;\u5c31\u4f1a\u4e00\u5c42\u5c42\u5f80\u4e0a\u95ee&#xff1a;\u6839\u57df\u540d\u670d\u52a1\u5668 \u2192 \u9876\u7ea7\u57df\u670d\u52a1\u5668&#xff08;\u5982 .com&#xff09; \u2192 \u6743\u5a01\u57df\u540d\u670d\u52a1\u5668&#xff0c;\u76f4\u5230\u62ff\u5230 IP \u5730\u5740\u3002<\/li>\n<\/ul>\n<p>DNS \u67e5\u8be2\u7684\u5c42\u7ea7\u7ed3\u6784\u53ef\u4ee5\u7b80\u8981\u6982\u62ec\u4e3a&#xff1a; \u6d4f\u89c8\u5668\u7f13\u5b58 \u2192 \u64cd\u4f5c\u7cfb\u7edf\u7f13\u5b58 \u2192 \u672c\u5730 DNS \u670d\u52a1\u5668 \u2192 \u6839\u57df\u540d\u670d\u52a1\u5668 \u2192 \u9876\u7ea7\u57df\u670d\u52a1\u5668 \u2192 \u6743\u5a01\u57df\u540d\u670d\u52a1\u5668<\/p>\n<h4>3. \u5efa\u7acb TCP \u8fde\u63a5&#xff08;\u6253\u7535\u8bdd\u786e\u8ba4&#xff09;<\/h4>\n<p>\u62ff\u5230 IP \u540e&#xff0c;\u6d4f\u89c8\u5668\u8981\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5&#xff0c;\u4e5f\u5c31\u662f\u7ecf\u5178\u7684 \u201cTCP \u4e09\u6b21\u63e1\u624b\u201d&#xff1a;<\/p>\n<table>\n<tr>\u6b65\u9aa4\u53d1\u9001\u65b9\u6d88\u606f\u542b\u4e49<\/tr>\n<tbody>\n<tr>\n<td>\u7b2c\u4e00\u6b21\u63e1\u624b<\/td>\n<td>\u6d4f\u89c8\u5668<\/td>\n<td>SYN<\/td>\n<td>\u201c\u5582&#xff0c;\u4f60\u5728\u5417&#xff1f;\u201d<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c\u4e8c\u6b21\u63e1\u624b<\/td>\n<td>\u670d\u52a1\u5668<\/td>\n<td>SYN-ACK<\/td>\n<td>\u201c\u6211\u5728&#xff0c;\u4f60\u542c\u5f97\u5230\u5417&#xff1f;\u201d<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c\u4e09\u6b21\u63e1\u624b<\/td>\n<td>\u6d4f\u89c8\u5668<\/td>\n<td>ACK<\/td>\n<td>\u201c\u542c\u5f97\u5230&#xff0c;\u90a3\u6211\u4eec\u5f00\u59cb\u804a\u5427&#xff01;\u201d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>4. TLS \u63e1\u624b&#xff08;HTTPS \u4e13\u5c5e&#xff1a;\u5bf9\u6697\u53f7\u4e0e\u9a8c\u660e\u6b63\u8eab&#xff09;<\/h4>\n<p>\u5982\u679c\u4f60\u7528\u7684\u662f https:\/\/&#xff0c;\u5728 TCP \u8fde\u63a5\u540e&#xff0c;\u8fd8\u8981\u8fdb\u884c\u5b89\u5168\u9a8c\u8bc1&#xff08;TLS \u534f\u5546&#xff09;\u3002\u8fd9\u5c31\u50cf\u63a5\u5934\u65f6\u5bf9\u6697\u53f7&#xff1a;<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u8981\u5546\u91cf\u597d\u7528\u4ec0\u4e48\u65b9\u5f0f\u52a0\u5bc6\u6570\u636e&#xff0c;\u670d\u52a1\u5668\u8fd8\u8981\u51fa\u793a\u81ea\u5df1\u7684 \u201c\u6570\u5b57\u8bc1\u4e66\u201d \u8bc1\u660e\u8eab\u4efd\u3002<\/li>\n<li>\u4ee3\u4ef7&#xff1a; \u8fd9\u4f1a\u989d\u5916\u589e\u52a0\u51e0\u6b21\u7f51\u7edc\u5f80\u8fd4&#xff0c;\u6240\u4ee5 HTTPS \u4f1a\u6bd4 HTTP \u7a0d\u5fae\u6162\u4e00\u70b9\u70b9&#xff0c;\u4f46\u6362\u6765\u7684\u662f\u7edd\u5bf9\u7684\u5b89\u5168\u3002<\/li>\n<\/ul>\n<h4>5. \u53d1\u9001 HTTP \u8bf7\u6c42\u4e0e\u63a5\u6536\u54cd\u5e94&#xff08;\u4e0b\u5355\u4e0e\u6536\u8d27&#xff09;<\/h4>\n<ul>\n<li>\u53d1\u8bf7\u6c42&#xff1a; \u6d4f\u89c8\u5668\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42&#xff1a;\u201c\u8bf7\u628a\u9996\u9875\u7684 HTML \u7ed9\u6211&#xff01;\u201d<\/li>\n<li>\u670d\u52a1\u5668\u5904\u7406&#xff1a; \u540e\u7aef\u53ef\u80fd\u8981\u53bb\u67e5\u6570\u636e\u5e93\u3001\u505a\u4e1a\u52a1\u903b\u8f91\u3002<\/li>\n<li>\u6536\u54cd\u5e94&#xff1a; \u670d\u52a1\u5668\u8fd4\u56de\u72b6\u6001\u7801&#xff0c;\u5e76\u628a HTML \u6587\u4ef6\u50cf\u5feb\u9012\u4e00\u6837\u53d1\u7ed9\u6d4f\u89c8\u5668\u3002<\/li>\n<\/ul>\n<p>\u5e38\u89c1\u7684 HTTP \u72b6\u6001\u7801&#xff1a;<\/p>\n<table>\n<tr>\u72b6\u6001\u7801\u542b\u4e49\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>200<\/td>\n<td>OK<\/td>\n<td>\u8bf7\u6c42\u6210\u529f<\/td>\n<\/tr>\n<tr>\n<td>301<\/td>\n<td>Moved Permanently<\/td>\n<td>\u6c38\u4e45\u91cd\u5b9a\u5411\u5230\u53e6\u4e00\u4e2a\u7f51\u5740<\/td>\n<\/tr>\n<tr>\n<td>404<\/td>\n<td>Not Found<\/td>\n<td>\u627e\u4e0d\u5230\u9875\u9762<\/td>\n<\/tr>\n<tr>\n<td>500<\/td>\n<td>Internal Server Error<\/td>\n<td>\u670d\u52a1\u5668\u5185\u90e8\u9519\u8bef<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u7b2c\u4e8c\u9636\u6bb5&#xff1a;\u6e32\u67d3\u5c42&#xff08;\u62c6\u5305\u88c5\u3001\u6446\u76d8\u5403&#xff09;<\/h4>\n<p>\u6d4f\u89c8\u5668\u62ff\u5230 HTML \u540e&#xff0c;\u771f\u6b63\u7684\u201c\u753b\u753b\u201d\u5de5\u4f5c\u5c31\u5f00\u59cb\u4e86\u3002\u73b0\u4ee3\u6d4f\u89c8\u5668\u662f\u591a\u8fdb\u7a0b\u7684&#xff0c;\u771f\u6b63\u5e72\u6d3b\u7684\u662f \u6e32\u67d3\u8fdb\u7a0b&#xff1a;<\/p>\n<h4>6. \u89e3\u6790 HTML&#xff0c;\u6784\u5efa DOM \u6811&#xff08;\u642d\u9aa8\u67b6&#xff09;<\/h4>\n<p>\u6d4f\u89c8\u5668\u9010\u884c\u8bfb\u53d6 HTML \u4ee3\u7801&#xff0c;\u628a\u5b83\u8f6c\u6362\u6210\u5185\u5b58\u4e2d\u7684 \u201c\u6587\u6863\u5bf9\u8c61\u6a21\u578b&#xff08;DOM&#xff09;\u6811\u201d\u3002\u8fd9\u5c31\u50cf\u642d\u623f\u5b50\u7684\u94a2\u7b4b\u6df7\u51dd\u571f\u9aa8\u67b6\u3002<\/p>\n<h4>7. \u89e3\u6790 CSS&#xff0c;\u6784\u5efa CSSOM \u6811&#xff08;\u5b9a\u88c5\u4fee&#xff09;<\/h4>\n<p>\u540c\u65f6&#xff0c;\u6d4f\u89c8\u5668\u4f1a\u89e3\u6790 CSS \u6837\u5f0f\u8868&#xff0c;\u751f\u6210 CSSOM \u6811\u3002\u8fd9\u51b3\u5b9a\u4e86\u9aa8\u67b6\u4e0a\u54ea\u91cc\u5237\u4ec0\u4e48\u989c\u8272\u7684\u6f06\u3002<\/p>\n<p>\u6ce8\u610f&#xff1a; \u5982\u679c CSS \u8fd8\u6ca1\u4e0b\u8f7d\u5b8c&#xff0c;\u6d4f\u89c8\u5668\u4e0d\u4f1a\u628a\u534a\u6210\u54c1\u5c55\u793a\u7ed9\u4f60\u770b&#xff08;\u9632\u6b62\u9875\u9762\u95ea\u70c1&#xff09;&#xff0c;\u5b83\u4f1a\u7b49 CSS \u89e3\u6790\u5b8c\u518d\u5f80\u4e0b\u8d70\u3002\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u6211\u4eec\u901a\u5e38\u5efa\u8bae\u628a\u5173\u952e CSS \u5185\u8054\u5728 &lt;head&gt; \u4e2d&#xff0c;\u6216\u5c3d\u65e9\u52a0\u8f7d CSS \u6587\u4ef6\u3002<\/p>\n<h4>8. \u6784\u5efa\u6e32\u67d3\u6811&#xff08;Render Tree&#xff09;<\/h4>\n<p>\u6d4f\u89c8\u5668\u628a DOM \u6811\u548c CSSOM \u6811\u5408\u5e76&#xff0c;\u751f\u6210 \u201c\u6e32\u67d3\u6811\u201d\u3002<\/p>\n<p>\u5173\u952e\u70b9&#xff1a; \u6e32\u67d3\u6811\u53ea\u5305\u542b\u9700\u8981\u663e\u793a\u7684\u5143\u7d20\u3002\u50cf &lt;head&gt; \u6807\u7b7e\u6216\u8005\u88ab CSS \u8bbe\u7f6e\u4e3a display: none \u7684\u5143\u7d20&#xff0c;\u4f1a\u88ab\u76f4\u63a5\u6254\u6389&#xff0c;\u4e0d\u6d6a\u8d39\u7b97\u529b\u3002<\/p>\n<h4>9. \u5e03\u5c40&#xff08;Layout \/ \u56de\u6d41 Reflow&#xff09;<\/h4>\n<p>\u6d4f\u89c8\u5668\u5f00\u59cb\u8ba1\u7b97\u6e32\u67d3\u6811\u4e0a\u6bcf\u4e2a\u8282\u70b9\u5728\u5c4f\u5e55\u4e0a\u7684\u786e\u5207\u4f4d\u7f6e\u548c\u5927\u5c0f&#xff08;\u6bd4\u5982\u8fd9\u4e2a\u6309\u94ae\u8ddd\u79bb\u5de6\u8fb9\u591a\u5c11\u50cf\u7d20&#xff0c;\u9ad8\u5ea6\u662f\u591a\u5c11&#xff09;\u3002<\/p>\n<h4>10. \u7ed8\u5236&#xff08;Paint \/ \u91cd\u7ed8 Repaint&#xff09;<\/h4>\n<p>\u6839\u636e\u8ba1\u7b97\u597d\u7684\u4f4d\u7f6e\u548c\u6837\u5f0f&#xff0c;\u6d4f\u89c8\u5668\u8c03\u7528\u56fe\u5f62\u5e93&#xff0c;\u628a\u8282\u70b9\u771f\u6b63\u753b\u5728\u5c4f\u5e55\u4e0a&#xff0c;\u586b\u5145\u989c\u8272\u3001\u7ed8\u5236\u6587\u672c\u548c\u8fb9\u6846\u3002<\/p>\n<h4>11. \u5408\u6210&#xff08;Compositing&#xff09;\u4e0e\u663e\u793a<\/h4>\n<p>\u5982\u679c\u9875\u9762\u6709\u590d\u6742\u7684\u5c42\u53e0\u5173\u7cfb\u6216\u52a8\u753b&#xff0c;\u6d4f\u89c8\u5668\u4f1a\u628a\u4e0d\u540c\u7684\u56fe\u5c42\u50cf\u53e0\u900f\u660e\u5851\u6599\u7247\u4e00\u6837\u5408\u5e76\u5728\u4e00\u8d77&#xff0c;\u6700\u7ec8\u901a\u8fc7 GPU \u663e\u793a\u5230\u4f60\u7684\u5c4f\u5e55\u4e0a\u3002<\/p>\n<p>\u56de\u6d41&#xff08;Reflow&#xff09;\u4e0e\u91cd\u7ed8&#xff08;Repaint&#xff09;\u7684\u533a\u522b&#xff1a;<\/p>\n<ul>\n<li>\u56de\u6d41&#xff1a;\u5143\u7d20\u7684\u51e0\u4f55\u5c5e\u6027&#xff08;\u4f4d\u7f6e\u3001\u5927\u5c0f&#xff09;\u53d1\u751f\u53d8\u5316&#xff0c;\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5e03\u5c40&#xff0c;\u4ee3\u4ef7\u8f83\u9ad8\u3002<\/li>\n<li>\u91cd\u7ed8&#xff1a;\u5143\u7d20\u7684\u5916\u89c2&#xff08;\u989c\u8272\u3001\u80cc\u666f\u7b49&#xff09;\u53d1\u751f\u53d8\u5316&#xff0c;\u4f46\u4e0d\u5f71\u54cd\u5e03\u5c40&#xff0c;\u4ee3\u4ef7\u76f8\u5bf9\u8f83\u4f4e\u3002<\/li>\n<li>\u5408\u6210&#xff08;Compositing&#xff09;\u662f\u6700\u9ad8\u6548\u7684&#xff0c;\u56e0\u4e3a\u5b83\u4e0d\u89e6\u53d1\u56de\u6d41\u548c\u91cd\u7ed8&#xff0c;\u76f4\u63a5\u7531 GPU \u5904\u7406\u3002<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e8c\u3001URL\u7ec4\u6210<\/h2>\n<p>\u4e00\u4e2a\u6807\u51c6\u7684 URL \u683c\u5f0f\u957f\u8fd9\u6837&#xff1a;<\/p>\n<p>\u534f\u8bae:\/\/\u57df\u540d:\u7aef\u53e3\/\u8def\u5f84?\u67e5\u8be2\u53c2\u6570#\u54c8\u5e0c\u503c<\/p>\n<p>\u5b8c\u6574\u793a\u4f8b&#xff1a;<\/p>\n<p>https:\/\/www.shop.com:443\/goods\/detail?id&#061;123&#038;color&#061;red#comments<\/p>\n<h4>1. \u534f\u8bae (Scheme) \u2014\u2014 https:\/\/<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u89c4\u5b9a\u4e86\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7528\u4ec0\u4e48\u201c\u8bed\u8a00\u201d\u6765\u4ea4\u6d41\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a;\n<ul>\n<li>http:\/\/ \u6216 https:\/\/&#xff1a;\u6700\u5e38\u89c1\u7684\u7f51\u9875\u534f\u8bae\u3002<\/li>\n<li>ftp:\/\/&#xff1a;\u6587\u4ef6\u4f20\u8f93\u534f\u8bae&#xff0c;\u7528\u6765\u4e0b\u8f7d\u6587\u4ef6\u7684\u3002<\/li>\n<li>mailto:&#xff1a;\u70b9\u51fb\u540e\u4f1a\u5524\u8d77\u4f60\u7535\u8111\u4e0a\u7684\u90ae\u4ef6\u8f6f\u4ef6&#xff08;\u6bd4\u5982 mailto:admin&#064;test.com&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5927\u5e08\u907f\u5751&#xff1a; \u73b0\u5728\u4e3a\u4e86\u5b89\u5168&#xff0c;\u6d4f\u89c8\u5668\u5bf9 HTTP \u548c HTTPS \u6df7\u7528\u7684\u9650\u5236\u975e\u5e38\u4e25\u3002\u5982\u679c\u4f60\u7684\u7f51\u9875\u662f HTTPS \u7684&#xff0c;\u4f46\u91cc\u9762\u5f15\u7528\u4e86\u4e00\u4e2a HTTP \u7684\u56fe\u7247&#xff0c;\u6d4f\u89c8\u5668\u901a\u5e38\u4f1a\u76f4\u63a5\u62e6\u622a\u5e76\u62a5\u9519&#xff08;\u8fd9\u53eb \u6df7\u5408\u5185\u5bb9\u5b89\u5168\u7b56\u7565&#xff09;\u3002<\/li>\n<\/ul>\n<h4>2. \u57df\u540d (Host) \u2014\u2014 www.shop.com<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u670d\u52a1\u5668\u7684\u201c\u540d\u5b57\u201d\u6216\u201c\u95e8\u724c\u53f7\u201d\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a; \u5c31\u50cf\u6211\u4eec\u4e4b\u524d\u804a\u8fc7\u7684&#xff0c;\u6d4f\u89c8\u5668\u62ff\u5230\u8fd9\u4e2a\u540d\u5b57\u540e&#xff0c;\u4f1a\u53bb\u95ee DNS \u670d\u52a1\u5668&#xff0c;\u628a\u5b83\u7ffb\u8bd1\u6210\u673a\u5668\u80fd\u61c2\u7684 IP \u5730\u5740&#xff08;\u6bd4\u5982 192.168.1.1&#xff09;\u3002<\/li>\n<\/ul>\n<h4>3. \u7aef\u53e3 (Port) \u2014\u2014 :443<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u670d\u52a1\u5668\u4e0a\u5177\u4f53\u8d1f\u8d23\u63a5\u5f85\u7684\u201c\u670d\u52a1\u7a97\u53e3\u201d\u3002\u4e00\u53f0\u670d\u52a1\u5668\u53ef\u4ee5\u540c\u65f6\u8dd1\u5f88\u591a\u4e2a\u670d\u52a1&#xff0c;\u7aef\u53e3\u5c31\u662f\u7528\u6765\u533a\u5206\u5b83\u4eec\u7684\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a;\n<ul>\n<li>HTTP \u9ed8\u8ba4\u7aef\u53e3\u662f 80&#xff0c;HTTPS \u9ed8\u8ba4\u7aef\u53e3\u662f 443\u3002<\/li>\n<li>\u6ce8\u610f&#xff1a; \u5982\u679c\u4f7f\u7528\u7684\u662f\u9ed8\u8ba4\u7aef\u53e3&#xff0c;URL \u4e2d\u901a\u5e38\u4f1a\u7701\u7565\u4e0d\u5199&#xff08;\u5c31\u50cf\u4e0a\u9762\u7684\u4f8b\u5b50&#xff0c;\u867d\u7136\u9ed8\u8ba4\u662f 443&#xff0c;\u4f46\u4e00\u822c\u4e0d\u5199\u51fa\u6765&#xff09;\u3002\u53ea\u6709\u5728\u5f00\u53d1\u73af\u5883\u6216\u8005\u7279\u6b8a\u914d\u7f6e\u65f6&#xff0c;\u4f60\u624d\u4f1a\u770b\u5230\u7c7b\u4f3c http:\/\/localhost:3000 \u8fd9\u6837\u7684\u5730\u5740\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>4. \u8def\u5f84 (Path) \u2014\u2014 \/goods\/detail<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u670d\u52a1\u5668\u4e0a\u5177\u4f53\u6587\u4ef6\u7684\u201c\u5b58\u653e\u4f4d\u7f6e\u201d\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a; \u8fd9\u5c31\u597d\u6bd4\u53bb\u5927\u5546\u573a&#xff0c;\/goods \u662f\u5546\u54c1\u533a&#xff0c;\/detail \u662f\u8be6\u60c5\u9875\u3002\u5728\u540e\u7aef\u4ee3\u7801\u91cc&#xff0c;\u8fd9\u4e2a\u8def\u5f84\u901a\u5e38\u4f1a\u88ab\u8def\u7531\u7cfb\u7edf\u62e6\u622a&#xff0c;\u7136\u540e\u8fd4\u56de\u5bf9\u5e94\u7684\u9875\u9762\u6216\u6570\u636e\u3002<\/li>\n<\/ul>\n<h4>5. \u67e5\u8be2\u53c2\u6570 (Query) \u2014\u2014 ?id&#061;123&amp;color&#061;red<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u4ee5 ? \u5f00\u5934&#xff0c;\u7528\u6765\u7ed9\u670d\u52a1\u5668\u4f20\u9012\u989d\u5916\u4fe1\u606f\u7684\u3002\u591a\u4e2a\u53c2\u6570\u4e4b\u95f4\u7528 &amp; \u8fde\u63a5&#xff0c;\u952e\u548c\u503c\u4e4b\u95f4\u7528 &#061; \u8fde\u63a5\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a;\n<ul>\n<li>\u4f60\u5728\u6dd8\u5b9d\u641c\u7d22\u201c\u624b\u673a\u201d&#xff0c;URL \u4f1a\u53d8\u6210 search?q&#061;\u624b\u673a\u3002<\/li>\n<li>\u5206\u9875\u529f\u80fd&#xff1a;\/list?page&#061;2&amp;size&#061;10&#xff08;\u544a\u8bc9\u670d\u52a1\u5668\u6211\u8981\u7b2c 2 \u9875&#xff0c;\u6bcf\u9875 10 \u6761\u6570\u636e&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5927\u5e08\u907f\u5751&#xff1a; \u4f5c\u4e3a\u524d\u7aef&#xff0c;\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u83b7\u53d6\u8fd9\u4e9b\u53c2\u6570\u3002\u5728 Vue\/React \u7b49\u73b0\u4ee3\u6846\u67b6\u4e2d&#xff0c;\u6709\u73b0\u6210\u7684 API&#xff08;\u5982 useSearchParams&#xff09;\u53ef\u4ee5\u76f4\u63a5\u62ff\u5230 { id: &#039;123&#039;, color: &#039;red&#039; }\u3002<\/li>\n<\/ul>\n<h4>6. \u54c8\u5e0c\u503c (Hash) \u2014\u2014 #comments<\/h4>\n<ul>\n<li>\u662f\u4ec0\u4e48&#xff1a; \u4ee5 # \u5f00\u5934&#xff0c;\u4e5f\u53eb\u951a\u70b9\u3002\u5b83\u7684\u4f5c\u7528\u662f\u5728\u9875\u9762\u5185\u90e8\u8fdb\u884c\u5b9a\u4f4d\u3002<\/li>\n<li>\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f8b\u5b50&#xff1a;\n<ul>\n<li>\u9875\u9762\u8df3\u8f6c&#xff1a; \u77e5\u4e4e\u6216\u957f\u6587\u7ae0\u91cc&#xff0c;\u70b9\u51fb\u201c\u8df3\u8f6c\u5230\u8bc4\u8bba\u533a\u201d&#xff0c;URL \u540e\u9762\u5c31\u4f1a\u52a0\u4e0a #comments&#xff0c;\u9875\u9762\u4f1a\u81ea\u52a8\u6eda\u52a8\u5230\u8bc4\u8bba\u533a\u7684\u4f4d\u7f6e\u3002<\/li>\n<li>\u524d\u7aef\u8def\u7531&#xff1a; \u65e9\u671f\u7684 Vue\/React \u5355\u9875\u5e94\u7528&#xff08;SPA&#xff09;\u5c31\u662f\u7528 Hash \u6a21\u5f0f\u6765\u505a\u8def\u7531\u7684&#xff0c;\u6bd4\u5982 \/#\/user\/profile\u3002\u56e0\u4e3a # \u540e\u9762\u7684\u5185\u5bb9\u6c38\u8fdc\u4e0d\u4f1a\u53d1\u9001\u7ed9\u670d\u52a1\u5668&#xff0c;\u6240\u4ee5\u5237\u65b0\u9875\u9762\u4e5f\u4e0d\u4f1a\u62a5 404 \u9519\u8bef\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e09\u3001DNS\u670d\u52a1\u5668<\/h2>\n<h4>1. \u4ec0\u4e48\u662f DNS \u670d\u52a1\u5668&#xff1f;&#xff08;\u901a\u4fd7\u7406\u89e3&#xff09;<\/h4>\n<p>DNS&#xff08;Domain Name System&#xff0c;\u57df\u540d\u7cfb\u7edf&#xff09;\u88ab\u79f0\u4e3a \u201c\u4e92\u8054\u7f51\u7684\u7535\u8bdd\u7c3f\u201d\u3002<\/p>\n<ul>\n<li>\u4eba\u7c7b\u4e60\u60ef&#xff1a; \u6211\u4eec\u8bb0\u4e0d\u4f4f 139.186.239.126 \u8fd9\u6837\u4e00\u4e32\u6beb\u65e0\u89c4\u5f8b\u7684 IP \u5730\u5740&#xff0c;\u6211\u4eec\u53ea\u8bb0\u5f97 cloud.tencent.com\u3002<\/li>\n<li>\u673a\u5668\u4e60\u60ef&#xff1a; \u7535\u8111\u548c\u7f51\u7edc\u8bbe\u5907\u4e4b\u95f4\u901a\u4fe1&#xff0c;\u53ea\u8ba4 IP \u5730\u5740\u3002<\/li>\n<\/ul>\n<p>DNS \u670d\u52a1\u5668\u5c31\u662f\u8d1f\u8d23\u628a \u201c\u4eba\u7c7b\u597d\u8bb0\u7684\u57df\u540d\u201d \u7ffb\u8bd1\u6210 \u201c\u673a\u5668\u597d\u61c2\u7684 IP \u5730\u5740\u201d \u7684\u8ba1\u7b97\u673a\u3002\u5f53\u4f60\u5728\u6d4f\u89c8\u5668\u8f93\u5165\u7f51\u5740\u65f6&#xff0c;\u6d4f\u89c8\u5668\u5c31\u4f1a\u53bb\u95ee DNS \u670d\u52a1\u5668&#xff1a;\u201c\u8fd9\u4e2a\u7f51\u5740\u5bf9\u5e94\u7684 IP \u662f\u591a\u5c11&#xff1f;\u201d<\/p>\n<h4>2. DNS \u89e3\u6790\u7684\u201c\u95ee\u8def\u201d\u6d41\u7a0b&#xff08;\u6838\u5fc3\u91cd\u70b9&#xff09;<\/h4>\n<p>DNS \u5e76\u4e0d\u662f\u4e00\u4e2a\u5355\u4e00\u7684\u670d\u52a1\u5668&#xff0c;\u800c\u662f\u4e00\u4e2a\u5c42\u7ea7\u5206\u660e\u3001\u4e92\u76f8\u914d\u5408\u7684\u7cfb\u7edf\u3002\u5f53\u4f60\u8bbf\u95ee\u4e00\u4e2a\u7f51\u7ad9\u65f6&#xff0c;\u901a\u5e38\u4f1a\u7ecf\u5386\u4ee5\u4e0b\u51e0\u4e2a\u89d2\u8272\u7684\u63a5\u529b&#xff1a;<\/p>\n<h5>\u7b2c\u4e00\u6b65&#xff1a;\u627e\u672c\u5730 DNS \u670d\u52a1\u5668&#xff08;\u4f60\u7684\u4e13\u5c5e\u5411\u5bfc&#xff09;<\/h5>\n<p>\u5f53\u4f60\u8f93\u5165\u7f51\u5740&#xff0c;\u6d4f\u89c8\u5668\u9996\u5148\u4f1a\u95ee\u4f60\u7684 \u201c\u672c\u5730 DNS \u670d\u52a1\u5668\u201d&#xff08;\u901a\u5e38\u7531\u4f60\u7684\u5bbd\u5e26\u8fd0\u8425\u5546 ISP \u63d0\u4f9b&#xff0c;\u6216\u8005\u4f60\u624b\u52a8\u8bbe\u7f6e\u7684\u516c\u5171 DNS&#xff09;\u3002<\/p>\n<table>\n<tr>\u60c5\u51b5\u8bf4\u660e\u7279\u70b9<\/tr>\n<tbody>\n<tr>\n<td>\u60c5\u51b5 A&#xff08;\u7f13\u5b58\u547d\u4e2d&#xff09;<\/td>\n<td>\u5982\u679c\u5411\u5bfc\u6700\u8fd1\u521a\u67e5\u8fc7\u8fd9\u4e2a\u7f51\u5740&#xff0c;\u5b83\u4f1a\u76f4\u63a5\u544a\u8bc9\u4f60 IP \u5730\u5740<\/td>\n<td>\u901f\u5ea6\u975e\u5e38\u5feb<\/td>\n<\/tr>\n<tr>\n<td>\u60c5\u51b5 B&#xff08;\u7f13\u5b58\u672a\u547d\u4e2d&#xff09;<\/td>\n<td>\u5411\u5bfc\u4e5f\u4e0d\u77e5\u9053&#xff0c;\u5b83\u5c31\u4f1a\u4ee3\u66ff\u4f60&#xff0c;\u4e00\u5c42\u4e00\u5c42\u5f80\u4e0a\u95ee<\/td>\n<td>\u9700\u8981\u9010\u7ea7\u67e5\u8be2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>\u7b2c\u4e8c\u6b65&#xff1a;\u95ee\u6839\u57df\u540d\u670d\u52a1\u5668&#xff08;\u4e92\u8054\u7f51\u603b\u67a2\u7ebd&#xff09;<\/h5>\n<p>\u5411\u5bfc\u4f1a\u53bb\u95ee\u6839\u57df\u540d\u670d\u52a1\u5668&#xff08;\u5168\u7403\u53ea\u6709 13 \u4e2a\u903b\u8f91\u6839\u670d\u52a1\u5668&#xff09;&#xff1a;\u201c\u4f60\u77e5\u9053 tencent.com \u5728\u54ea\u5417&#xff1f;\u201d<\/p>\n<p>\u6839\u670d\u52a1\u5668\u81ea\u5df1\u4e5f\u4e0d\u5b58\u5177\u4f53\u7684 IP&#xff0c;\u4f46\u5b83\u4f1a\u6307\u8def&#xff1a;\u201c\u6211\u4e0d\u6e05\u695a&#xff0c;\u4f46\u4f60\u53bb\u95ee\u8d1f\u8d23 .com \u7684\u9876\u7ea7\u57df\u540d\u670d\u52a1\u5668\u5427\u3002\u201d<\/p>\n<h5>\u7b2c\u4e09\u6b65&#xff1a;\u95ee\u9876\u7ea7\u57df\u540d\u670d\u52a1\u5668&#xff08;TLD Server&#xff09;<\/h5>\n<p>\u5411\u5bfc\u987a\u7740\u7ebf\u7d22&#xff0c;\u53bb\u95ee .com \u7684 TLD \u670d\u52a1\u5668\u3002TLD \u670d\u52a1\u5668\u4f1a\u8bf4&#xff1a;\u201ctencent.com \u7684\u5177\u4f53\u4fe1\u606f&#xff0c;\u4f60\u53bb\u95ee\u5b83\u7684\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668\u5427\u3002\u201d<\/p>\n<h5>\u7b2c\u56db\u6b65&#xff1a;\u95ee\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668&#xff08;\u6700\u7ec8\u7b54\u6848&#xff09;<\/h5>\n<p>\u5411\u5bfc\u6700\u540e\u627e\u5230\u817e\u8baf\u7684\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668&#xff0c;\u8fd9\u91cc\u771f\u6b63\u5b58\u50a8\u4e86 cloud.tencent.com \u5bf9\u5e94\u7684 IP \u5730\u5740\u3002\u6743\u5a01\u670d\u52a1\u5668\u628a IP \u4ea4\u7ed9\u5411\u5bfc&#xff0c;\u5411\u5bfc\u518d\u628a IP \u4ea4\u8fd8\u7ed9\u4f60\u7684\u6d4f\u89c8\u5668\u3002\u6d4f\u89c8\u5668\u62ff\u5230 IP&#xff0c;\u5c31\u53ef\u4ee5\u5f00\u59cb\u5efa\u7acb TCP \u8fde\u63a5\u4e86&#xff01;<\/p>\n<p>DNS \u89e3\u6790\u7684\u5b8c\u6574\u6d41\u7a0b\u53ef\u4ee5\u6982\u62ec\u4e3a&#xff1a; \u6d4f\u89c8\u5668 \u2192 \u672c\u5730 DNS \u670d\u52a1\u5668 \u2192 \u6839\u57df\u540d\u670d\u52a1\u5668 \u2192 \u9876\u7ea7\u57df\u670d\u52a1\u5668&#xff08;TLD&#xff09; \u2192 \u6743\u5a01\u57df\u540d\u670d\u52a1\u5668 \u2192 \u62ff\u5230 IP \u5730\u5740<\/p>\n<hr \/>\n<h2>\u56db\u3001\u57fa\u4e8eDNS\u7684\u524d\u7aef\u4f18\u5316<\/h2>\n<h4>1. DNS \u9884\u89e3\u6790 (dns-prefetch)<\/h4>\n<p>\u65e2\u7136\u67e5\u7535\u8bdd\u7c3f\u9700\u8981\u65f6\u95f4&#xff0c;\u6211\u4eec\u53ef\u4ee5\u5728\u9875\u9762\u52a0\u8f7d\u521d\u671f&#xff0c;\u5c31\u8ba9\u6d4f\u89c8\u5668\u201c\u63d0\u524d\u67e5\u597d\u201d\u540e\u7eed\u9700\u8981\u7528\u5230\u7684\u57df\u540d\u3002<\/p>\n<ul>\n<li>\u600e\u4e48\u505a&#xff1a; \u5728 HTML \u7684 &lt;head&gt; \u6807\u7b7e\u4e2d&#xff0c;\u6dfb\u52a0 &lt;link rel&#061;&#034;dns-prefetch&#034; href&#061;&#034;\/\/xxx.com&#034;&gt;\u3002<\/li>\n<li>\u5b9e\u6218\u4e3e\u4f8b&#xff1a; \u5982\u679c\u4f60\u7684\u9875\u9762\u7528\u5230\u4e86\u7b2c\u4e09\u65b9\u7684\u7edf\u8ba1\u4ee3\u7801&#xff08;\u6bd4\u5982 stats.example.net&#xff09;\u6216\u8005\u5916\u90e8\u5b57\u4f53&#xff08;\u6bd4\u5982 fonts.googleapis.com&#xff09;&#xff0c;\u63d0\u524d\u9884\u89e3\u6790\u5b83\u4eec&#xff0c;\u80fd\u7701\u4e0b\u7ea6 150ms \u5230 300ms \u7684\u7b49\u5f85\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h4>2. \u9884\u8fde\u63a5 (preconnect)<\/h4>\n<p>\u6bd4 dns-prefetch \u66f4\u8fdb\u4e00\u6b65\u3002\u5b83\u4e0d\u4ec5\u63d0\u524d\u67e5\u7535\u8bdd\u7c3f&#xff08;DNS \u89e3\u6790&#xff09;&#xff0c;\u8fd8\u63d0\u524d\u548c\u670d\u52a1\u5668\u5efa\u7acb TCP \u8fde\u63a5&#xff0c;\u751a\u81f3\u5b8c\u6210 TLS \u63e1\u624b&#xff08;HTTPS \u5b89\u5168\u9a8c\u8bc1&#xff09;\u3002<\/p>\n<ul>\n<li>\u600e\u4e48\u505a&#xff1a; &lt;link rel&#061;&#034;preconnect&#034; href&#061;&#034;https:\/\/cdn.example.com&#034;&gt;\u3002<\/li>\n<li>\u5b9e\u6218\u4e3e\u4f8b&#xff1a; \u5bf9\u4e8e\u9996\u5c4f\u6700\u5173\u952e\u7684\u8d44\u6e90&#xff08;\u6bd4\u5982\u6838\u5fc3 JS\/CSS \u6240\u5728\u7684 CDN \u57df\u540d&#xff09;&#xff0c;\u4f7f\u7528 preconnect \u6536\u76ca\u6781\u9ad8\u3002<\/li>\n<\/ul>\n<h4>3. \u5ba2\u6237\u7aef\/\u539f\u751f\u5c42\u9762\u7684\u4f18\u5316<\/h4>\n<p>\u5982\u679c\u4f60\u5f00\u53d1\u7684\u662f App \u5185\u5d4c\u7684 H5 \u9875\u9762&#xff08;WebView&#xff09;&#xff0c;\u53ef\u4ee5\u5229\u7528\u539f\u751f\u5ba2\u6237\u7aef\u7684\u80fd\u529b\u6765\u4f18\u5316&#xff1a;<\/p>\n<ul>\n<li>WebView \u9884\u70ed&#xff1a; \u5728 App \u542f\u52a8\u65f6&#xff0c;\u540e\u53f0\u6084\u6084\u521b\u5efa\u4e00\u4e2a 1\u00d71 \u50cf\u7d20\u7684\u9690\u85cf WebView&#xff0c;\u63d0\u524d\u53bb\u89e3\u6790\u5e38\u7528\u57df\u540d\u7684 IP \u5e76\u7f13\u5b58\u8d77\u6765\u3002\u7b49\u7528\u6237\u771f\u6b63\u6253\u5f00 H5 \u9875\u9762\u65f6&#xff0c;DNS \u89e3\u6790\u77ac\u95f4\u5b8c\u6210\u3002<\/li>\n<li>IP \u76f4\u8fde \/ HTTPDNS&#xff1a; \u4f20\u7edf\u7684 DNS \u5bb9\u6613\u53d7\u5230\u8fd0\u8425\u5546\u52ab\u6301&#xff08;\u88ab\u6076\u610f\u7be1\u6539 IP \u6216\u5f3a\u63d2\u5e7f\u544a&#xff09;\u3002\u901a\u8fc7 HTTPDNS \u6280\u672f&#xff0c;\u5ba2\u6237\u7aef\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7 HTTP \u534f\u8bae\u5411\u53ef\u9760\u7684 DNS \u670d\u52a1\u5668\u8bf7\u6c42 IP&#xff0c;\u62ff\u5230 IP \u540e\u76f4\u63a5\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42&#xff0c;\u65e2\u9632\u52ab\u6301\u53c8\u63d0\u901f\u3002<\/li>\n<\/ul>\n<h4>4. \u670d\u52a1\u7aef\/\u8fd0\u7ef4\u5c42\u9762\u7684\u4f18\u5316&#xff08;\u9700\u4e0e\u540e\u7aef\u914d\u5408&#xff09;<\/h4>\n<p>\u867d\u7136\u8fd9\u662f\u540e\u7aef\u7684\u5de5\u4f5c&#xff0c;\u4f46\u524d\u7aef\u4e86\u89e3\u5b83\u80fd\u66f4\u597d\u5730\u7406\u89e3\u5168\u5c40&#xff1a;<\/p>\n<ul>\n<li>\u667a\u80fd DNS (GSLB)&#xff1a; \u901a\u8fc7 DNS \u8bc6\u522b\u7528\u6237\u7684\u5730\u7406\u4f4d\u7f6e\u548c\u7f51\u7edc\u8fd0\u8425\u5546&#xff0c;\u628a\u7528\u6237\u8c03\u5ea6\u5230\u6700\u8fd1\u7684\u670d\u52a1\u5668\u3002\u6bd4\u5982\u5e7f\u5dde\u7535\u4fe1\u7528\u6237\u8bbf\u95ee&#xff0c;\u5c31\u89e3\u6790\u5230\u5e7f\u5dde\u7535\u4fe1\u7684\u673a\u623f IP&#xff0c;\u907f\u514d\u8de8\u5730\u57df\u3001\u8de8\u8fd0\u8425\u5546\u7684\u5ef6\u8fdf\u3002<\/li>\n<li>\u5408\u7406\u8bbe\u7f6e TTL&#xff08;\u7f13\u5b58\u65f6\u95f4&#xff09;&#xff1a; TTL \u51b3\u5b9a\u4e86 DNS \u7ed3\u679c\u5728\u672c\u5730\u7f13\u5b58\u591a\u4e45\u3002\u5982\u679c\u7f51\u7ad9 IP \u7ecf\u5e38\u53d8\u52a8&#xff0c;TTL \u8bbe\u77ed\u70b9&#xff1b;\u5982\u679c\u5f88\u7a33\u5b9a&#xff0c;TTL \u8bbe\u957f\u70b9&#xff0c;\u51cf\u5c11\u9891\u7e41\u67e5\u7535\u8bdd\u7c3f\u7684\u5f00\u9500\u3002<\/li>\n<\/ul>\n<table>\n<tr>\u6280\u672f\u4f5c\u7528\u8303\u56f4\u63d0\u901f\u6548\u679c\u9002\u7528\u573a\u666f<\/tr>\n<tbody>\n<tr>\n<td>dns-prefetch<\/td>\n<td>\u4ec5 DNS \u89e3\u6790<\/td>\n<td>\u8282\u7701 20~120ms<\/td>\n<td>\u7b2c\u4e09\u65b9\u8d44\u6e90\u3001\u5916\u90e8\u57df\u540d<\/td>\n<\/tr>\n<tr>\n<td>preconnect<\/td>\n<td>DNS &#043; TCP &#043; TLS<\/td>\n<td>\u8282\u7701 100~300ms<\/td>\n<td>\u5173\u952e CDN\u3001\u5b57\u4f53\u5e93<\/td>\n<\/tr>\n<tr>\n<td>HTTPDNS<\/td>\n<td>\u7ed5\u8fc7\u8fd0\u8425\u5546 DNS<\/td>\n<td>\u9632\u52ab\u6301 &#043; \u63d0\u901f<\/td>\n<td>\u79fb\u52a8\u7aef App<\/td>\n<\/tr>\n<tr>\n<td>WebView \u9884\u70ed<\/td>\n<td>DNS \u7f13\u5b58<\/td>\n<td>\u51e0\u4e4e 0 \u5ef6\u8fdf<\/td>\n<td>App \u5185\u5d4c H5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>\u4e94\u3001DNS\u9884\u89e3\u6790 \/ \u9884\u8fde\u63a5\u5e95\u5c42\u539f\u7406<\/h2>\n<p>\u8981\u7406\u89e3\u8fd9\u4e24\u4e2a\u6280\u672f\u4e3a\u4ec0\u4e48\u80fd\u63d0\u901f&#xff0c;\u6211\u4eec\u9996\u5148\u8981\u77e5\u9053&#xff0c;\u6d4f\u89c8\u5668\u52a0\u8f7d\u4e00\u4e2a\u8de8\u57df\u8d44\u6e90&#xff08;\u6bd4\u5982 CDN \u4e0a\u7684 CSS \u6216\u56fe\u7247&#xff09;&#xff0c;\u9ed8\u8ba4\u5fc5\u987b \u201c\u4e32\u884c\u201d \u8d70\u5b8c\u4e09\u4e2a\u6b65\u9aa4&#xff1a;<\/p>\n<li>DNS \u89e3\u6790&#xff08;\u67e5\u7535\u8bdd\u7c3f&#xff09;<\/li>\n<li>TCP \u63e1\u624b&#xff08;\u5efa\u7acb\u901a\u4fe1\u901a\u9053&#xff09;<\/li>\n<li>TLS \u534f\u5546&#xff08;HTTPS \u7684\u5b89\u5168\u9a8c\u8bc1&#xff09;<\/li>\n<p>\u5982\u679c\u7b49\u5230\u771f\u6b63\u9700\u8981\u52a0\u8f7d\u8d44\u6e90\u65f6\u624d\u53bb\u8d70\u8fd9\u4e09\u6b65&#xff0c;\u5c31\u4f1a\u53d1\u751f\u963b\u585e\u3002\u800c dns-prefetch \u548c preconnect \u7684\u6838\u5fc3\u601d\u60f3\u5c31\u662f&#xff1a;\u628a\u4e32\u884c\u7684\u5de5\u4f5c\u63d0\u524d\u505a&#xff0c;\u628a\u8017\u65f6\u7684\u7b49\u5f85\u53d8\u6210\u5e76\u884c\u7684\u51c6\u5907\u3002<\/p>\n<h4>DNS \u9884\u89e3\u6790 (dns-prefetch)<\/h4>\n<p>\u5e95\u5c42\u5b9e\u73b0&#xff1a;<\/p>\n<p>\u5b83\u53ea\u505a\u4e00\u4ef6\u4e8b&#xff1a;\u63d0\u524d\u628a\u57df\u540d\u89e3\u6790\u6210 IP \u5730\u5740&#xff0c;\u5e76\u5c06\u7ed3\u679c\u7f13\u5b58\u5728\u672c\u5730\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u3002\u5b83\u4e0d\u4f1a\u5efa\u7acb TCP \u8fde\u63a5&#xff0c;\u4e5f\u4e0d\u4f1a\u8fdb\u884c TLS \u63e1\u624b\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u66f4\u5feb&#xff1f;<\/p>\n<p>\u6d88\u9664\u7f51\u7edc\u5f80\u8fd4\u5ef6\u8fdf&#xff1a;DNS \u89e3\u6790\u901a\u5e38\u9700\u8981 20~120ms&#xff08;\u5f31\u7f51\u4e0b\u751a\u81f3\u66f4\u957f&#xff09;\u3002\u5982\u679c\u4e0d\u9884\u89e3\u6790&#xff0c;\u5f53\u6d4f\u89c8\u5668\u89e3\u6790\u5230 &lt;img src&#061;&#034;&#8230;&#034;&gt; \u65f6&#xff0c;\u5fc5\u987b\u505c\u4e0b\u6765\u53bb\u67e5 IP\u3002\u800c\u4f7f\u7528 dns-prefetch \u540e&#xff0c;\u6d4f\u89c8\u5668\u5728\u89e3\u6790 HTML \u7684\u65e9\u671f\u7a7a\u95f2\u65f6\u95f4&#xff0c;\u5c31\u63d0\u524d\u628a IP \u67e5\u597d\u5e76\u653e\u8fdb\u4e86\u672c\u5730\u7f13\u5b58\u3002\u7b49\u771f\u6b63\u52a0\u8f7d\u56fe\u7247\u65f6&#xff0c;\u76f4\u63a5\u8bfb\u53d6\u672c\u5730\u7f13\u5b58&#xff0c;\u8017\u65f6\u51e0\u4e4e\u4e3a 0\u3002<\/p>\n<h4>\u9884\u8fde\u63a5 (preconnect)<\/h4>\n<p>\u5e95\u5c42\u5b9e\u73b0&#xff1a;<\/p>\n<p>\u5b83\u6bd4 dns-prefetch \u505a\u5f97\u66f4\u591a\u3002\u5b83\u4e0d\u4ec5\u63d0\u524d\u89e3\u6790 DNS&#xff0c;\u8fd8\u4f1a\u63d0\u524d\u5b8c\u6210 TCP \u63e1\u624b&#xff0c;\u5982\u679c\u662f HTTPS \u7f51\u7ad9&#xff0c;\u8fd8\u4f1a\u63d0\u524d\u5b8c\u6210 TLS \u63e1\u624b\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u66f4\u5feb&#xff1f;<\/p>\n<p>\u6d88\u9664\u591a\u91cd\u63e1\u624b\u5ef6\u8fdf&#xff1a;TCP \u63e1\u624b\u9700\u8981 1 \u4e2a\u7f51\u7edc\u5f80\u8fd4&#xff08;RTT&#xff09;&#xff0c;TLS \u63e1\u624b\u9700\u8981 1~2 \u4e2a RTT\u3002\u9884\u8fde\u63a5\u628a\u8fd9\u4e9b\u8017\u65f6\u7684\u6b65\u9aa4\u63d0\u524d\u5230\u4e86\u9875\u9762\u52a0\u8f7d\u521d\u671f&#xff0c;\u4e0e HTML \u89e3\u6790\u5e76\u884c\u6267\u884c\u3002\u5f53\u540e\u7eed\u771f\u6b63\u53d1\u8d77\u8bf7\u6c42\u65f6&#xff0c;\u53d1\u73b0\u8fde\u63a5\u5df2\u7ecf\u5efa\u597d&#xff0c;\u76f4\u63a5\u590d\u7528&#xff0c;\u4ece\u800c\u6d88\u9664\u4e86\u5efa\u7acb\u65b0\u8fde\u63a5\u7684\u5ef6\u8fdf\u3002<\/p>\n<table>\n<tr>\u6280\u672fDNS \u89e3\u6790TCP \u63e1\u624bTLS \u63e1\u624b\u8d44\u6e90\u6d88\u8017<\/tr>\n<tbody>\n<tr>\n<td>dns-prefetch<\/td>\n<td>\u2705<\/td>\n<td>\u274c<\/td>\n<td>\u274c<\/td>\n<td>\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>preconnect<\/td>\n<td>\u2705<\/td>\n<td>\u2705<\/td>\n<td>\u2705<\/td>\n<td>\u8f83\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u907f\u5751\u6307\u5357<\/h4>\n<ul>\n<li>\n<p>\u9ec4\u91d1\u642d\u6863&#xff1a; \u5bf9\u4e8e\u652f\u6301 preconnect \u7684\u73b0\u4ee3\u6d4f\u89c8\u5668&#xff0c;\u5b83\u4f1a\u5b8c\u6210\u5168\u5957\u51c6\u5907&#xff1b;\u5bf9\u4e8e\u4e0d\u652f\u6301\u7684\u8001\u65e7\u6d4f\u89c8\u5668&#xff0c;\u5b83\u4f1a\u201c\u964d\u7ea7\u201d\u53bb\u6267\u884c dns-prefetch&#xff0c;\u4fdd\u8bc1\u517c\u5bb9\u6027\u3002<\/p>\n<p> <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>link<\/span> <span class=\"token attr-name\">rel<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>preconnect<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">href<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>https:\/\/cdn.example.com<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>link<\/span> <span class=\"token attr-name\">rel<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>dns-prefetch<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">href<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>https:\/\/cdn.example.com<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\n <\/li>\n<li>\n<p>\u5343\u4e07\u4e0d\u8981\u6ee5\u7528&#xff1a; \u9884\u8fde\u63a5&#xff08;preconnect&#xff09;\u4f1a\u5360\u7528\u6d4f\u89c8\u5668\u7684 CPU \u548c\u7f51\u7edc\u5e26\u5bbd\u3002\u5982\u679c\u9884\u8fde\u63a5\u4e86\u4f46\u6700\u540e\u6ca1\u7528\u5230&#xff0c;\u5c31\u662f\u767d\u767d\u6d6a\u8d39\u8d44\u6e90\u3002\u6700\u4f73\u5b9e\u8df5\u662f&#xff1a;\u53ea\u5bf9\u9996\u5c4f\u6700\u5173\u952e\u7684 3~6 \u4e2a\u7b2c\u4e09\u65b9\u57df\u540d&#xff08;\u5982\u6838\u5fc3 CDN\u3001\u5b57\u4f53\u5e93&#xff09;\u4f7f\u7528 preconnect&#xff0c;\u5176\u4f59\u7684\u8de8\u57df\u57df\u540d\u4f7f\u7528 dns-prefetch \u5373\u53ef\u3002<\/p>\n<\/li>\n<li>\n<p>\u540c\u6e90\u65e0\u6548&#xff1a; \u8fd9\u4e24\u4e2a\u6807\u7b7e\u53ea\u5bf9\u8de8\u57df\u8d44\u6e90\u6709\u6548\u3002\u4e0d\u8981\u5bf9\u5f53\u524d\u7f51\u7ad9\u7684\u57df\u540d\u505a\u9884\u89e3\u6790\u6216\u9884\u8fde\u63a5&#xff0c;\u56e0\u4e3a\u6d4f\u89c8\u5668\u5728\u52a0\u8f7d\u5f53\u524d\u9875\u9762\u65f6\u65e9\u5c31\u5efa\u597d\u8fde\u63a5\u4e86&#xff0c;\u5199\u4e86\u4e5f\u662f\u767d\u5199\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u516d\u3001\u56de\u6d41\u4e0e\u91cd\u7ed8<\/h2>\n<p>\u4e3a\u4e86\u8ba9\u4f60\u901a\u4fd7\u6613\u61c2\u5730\u7406\u89e3&#xff0c;\u6211\u4eec\u7ee7\u7eed\u7528\u201c\u753b\u5bb6\u753b\u753b\u201d\u7684\u4f8b\u5b50\u6765\u6253\u6bd4\u65b9\u3002<\/p>\n<ul>\n<li>\u56de\u6d41&#xff08;Reflow&#xff09;&#xff1a; \u76f8\u5f53\u4e8e\u201c\u91cd\u65b0\u6392\u7248\u201d\u3002\u5982\u679c\u4f60\u6539\u53d8\u4e86\u5143\u7d20\u7684\u5927\u5c0f\u3001\u4f4d\u7f6e&#xff0c;\u753b\u5bb6\u5c31\u5fc5\u987b\u91cd\u65b0\u8ba1\u7b97\u6574\u4e2a\u9875\u9762\u7684\u6392\u7248&#xff0c;\u975e\u5e38\u8017\u65f6\u3002<\/li>\n<li>\u91cd\u7ed8&#xff08;Repaint&#xff09;&#xff1a; \u76f8\u5f53\u4e8e\u201c\u91cd\u65b0\u4e0a\u8272\u201d\u3002\u5982\u679c\u4f60\u53ea\u662f\u6539\u53d8\u4e86\u5143\u7d20\u7684\u80cc\u666f\u8272\u6216\u6587\u5b57\u989c\u8272&#xff0c;\u5143\u7d20\u7684\u4f4d\u7f6e\u548c\u5927\u5c0f\u6ca1\u53d8&#xff0c;\u753b\u5bb6\u53ea\u9700\u8981\u91cd\u65b0\u6d82\u4e00\u4e0b\u989c\u8272\u5373\u53ef&#xff0c;\u76f8\u5bf9\u7701\u65f6\u3002<\/li>\n<\/ul>\n<h4>1. \u4ec0\u4e48\u662f\u56de\u6d41&#xff08;Reflow&#xff09;&#xff1f;<\/h4>\n<p>\u5f53 DOM \u7ed3\u6784\u3001\u5143\u7d20\u7684\u51e0\u4f55\u5c3a\u5bf8&#xff08;\u5bbd\u3001\u9ad8\u3001\u8fb9\u8ddd\u3001\u4f4d\u7f6e\u7b49&#xff09;\u53d1\u751f\u53d8\u5316\u65f6&#xff0c;\u6d4f\u89c8\u5668\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5143\u7d20\u7684\u51e0\u4f55\u5c5e\u6027&#xff0c;\u5e76\u91cd\u65b0\u6784\u5efa\u6e32\u67d3\u6811\u3002<\/p>\n<p>\u89e6\u53d1\u6761\u4ef6&#xff1a;<\/p>\n<ul>\n<li>\u4fee\u6539\u5143\u7d20\u7684\u5bbd\u9ad8\u3001\u5185\u5916\u8fb9\u8ddd&#xff08;margin\/padding&#xff09;\u3002<\/li>\n<li>\u6539\u53d8\u5143\u7d20\u7684\u5b9a\u4f4d&#xff08;position\u3001top\/left&#xff09;\u3002<\/li>\n<li>\u6dfb\u52a0\u6216\u5220\u9664\u53ef\u89c1\u7684 DOM \u5143\u7d20\u3002<\/li>\n<li>\u83b7\u53d6\u67d0\u4e9b\u7279\u5b9a\u5c5e\u6027&#xff08;\u5982 offsetTop\u3001scrollTop\u3001getComputedStyle()&#xff09;\u3002\u3010\u91cd\u70b9\u907f\u5751\u3011<\/li>\n<\/ul>\n<p>\u4ee3\u4ef7&#xff1a; \u6781\u5176\u6602\u8d35\u3002\u4e00\u65e6\u56de\u6d41&#xff0c;\u5fc5\u7136\u4f34\u968f\u91cd\u7ed8\u3002<\/p>\n<h4>2. \u4ec0\u4e48\u662f\u91cd\u7ed8&#xff08;Repaint&#xff09;&#xff1f;<\/h4>\n<p>\u5f53\u5143\u7d20\u7684\u5916\u89c2\u53d1\u751f\u53d8\u5316&#xff0c;\u4f46\u4e0d\u5f71\u54cd\u5176\u51e0\u4f55\u5e03\u5c40\u65f6&#xff0c;\u6d4f\u89c8\u5668\u53ea\u9700\u8981\u91cd\u65b0\u7ed8\u5236\u8be5\u5143\u7d20\u3002<\/p>\n<p>\u89e6\u53d1\u6761\u4ef6&#xff1a;<\/p>\n<ul>\n<li>\u4fee\u6539\u80cc\u666f\u8272&#xff08;background-color&#xff09;\u3002<\/li>\n<li>\u4fee\u6539\u6587\u5b57\u989c\u8272&#xff08;color&#xff09;\u3002<\/li>\n<li>\u4fee\u6539\u53ef\u89c1\u6027&#xff08;visibility: hidden&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u4ee3\u4ef7&#xff1a; \u76f8\u5bf9\u8f83\u5c0f\u3002\u91cd\u7ed8\u4e0d\u4e00\u5b9a\u4f1a\u89e6\u53d1\u56de\u6d41\u3002<\/p>\n<h4>3. \u4f18\u5316\u6307\u5357<\/h4>\n<p>\u2460 \u6279\u91cf\u4fee\u6539\u6837\u5f0f&#xff08;\u907f\u514d\u8fde\u7eed\u56de\u6d41&#xff09;<\/p>\n<p>\u9519\u8bef\u793a\u8303&#xff1a; \u7528 JS \u8fde\u7eed\u4fee\u6539\u5143\u7d20\u7684\u591a\u4e2a\u6837\u5f0f\u3002\u8fd9\u4f1a\u89e6\u53d1 3 \u6b21\u56de\u6d41&#xff01;<\/p>\n<p>element<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>width <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;100px&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nelement<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>height <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;200px&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\nelement<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>padding <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;10px&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4f18\u5316\u65b9\u6848&#xff1a; \u628a\u6837\u5f0f\u5199\u5728\u4e00\u4e2a CSS \u7c7b\u91cc&#xff0c;\u7136\u540e\u7528 JS \u4e00\u6b21\u6027\u5207\u6362\u7c7b\u540d\u3002\u53ea\u89e6\u53d1 1 \u6b21\u56de\u6d41\u3002<\/p>\n<p>element<span class=\"token punctuation\">.<\/span>classList<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;new-style&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u2461 \u907f\u514d\u9891\u7e41\u8bfb\u53d6\u51e0\u4f55\u5c5e\u6027&#xff08;\u5f3a\u5236\u540c\u6b65\u5e03\u5c40&#xff09;<\/p>\n<p>\u9519\u8bef\u793a\u8303&#xff1a; \u5728\u5faa\u73af\u4e2d\u4ea4\u66ff\u201c\u4fee\u6539\u6837\u5f0f\u201d\u548c\u201c\u8bfb\u53d6\u5c5e\u6027\u201d\u3002\u6d4f\u89c8\u5668\u4e3a\u4e86\u7ed9\u4f60\u51c6\u786e\u7684\u503c&#xff0c;\u4f1a\u5f3a\u5236\u7acb\u5373\u89e6\u53d1\u56de\u6d41\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> box <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;box&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5728\u5faa\u73af\u4e2d\u4ea4\u66ff\u201c\u4fee\u6539\u201d\u548c\u201c\u8bfb\u53d6\u201d&#xff0c;\u6d4f\u89c8\u5668\u4f1a\u88ab\u8feb\u6bcf\u6b21\u90fd\u91cd\u65b0\u8ba1\u7b97<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  box<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>top <span class=\"token operator\">&#061;<\/span> box<span class=\"token punctuation\">.<\/span>offsetTop <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#039;px&#039;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8bfb\u53d6 offsetTop \u4f1a\u5f3a\u5236\u6d4f\u89c8\u5668\u7acb\u523b\u56de\u6d41&#xff01;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f18\u5316\u65b9\u6848&#xff1a; \u628a\u8bfb\u53d6\u64cd\u4f5c\u96c6\u4e2d\u8d77\u6765&#xff0c;\u6216\u8005\u7f13\u5b58\u5230\u53d8\u91cf\u4e2d\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> box <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;box&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5148\u628a\u9700\u8981\u7684\u503c\u8bfb\u51fa\u6765&#xff0c;\u5b58\u5230\u53d8\u91cf\u91cc<\/span><br \/>\n<span class=\"token keyword\">let<\/span> currentTop <span class=\"token operator\">&#061;<\/span> box<span class=\"token punctuation\">.<\/span>offsetTop<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  currentTop <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  box<span class=\"token punctuation\">.<\/span>style<span class=\"token punctuation\">.<\/span>top <span class=\"token operator\">&#061;<\/span> currentTop <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#039;px&#039;<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u53ea\u4fee\u6539&#xff0c;\u4e0d\u8bfb\u53d6&#xff0c;\u6d4f\u89c8\u5668\u53ef\u4ee5\u6279\u91cf\u5408\u5e76\u56de\u6d41<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u2462 \u4f7f\u7528\u79bb\u7ebf DOM \u64cd\u4f5c<\/p>\n<p>\u573a\u666f&#xff1a; \u9700\u8981\u5411\u9875\u9762\u4e2d\u63d2\u5165 1000 \u4e2a\u5217\u8868\u9879\u3002\u5982\u679c\u76f4\u63a5 appendChild 1000 \u6b21&#xff0c;\u4f1a\u89e6\u53d1 1000 \u6b21\u56de\u6d41\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> ul <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;list&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> li <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">createElement<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;li&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  li<span class=\"token punctuation\">.<\/span>innerText <span class=\"token operator\">&#061;<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">Item <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>i<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n  ul<span class=\"token punctuation\">.<\/span><span class=\"token function\">appendChild<\/span><span class=\"token punctuation\">(<\/span>li<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6bcf\u6b21\u5faa\u73af\u90fd\u4f1a\u89e6\u53d1\u4e00\u6b21\u56de\u6d41&#xff0c;\u9875\u9762\u8981\u56de\u6d41 1000 \u6b21&#xff01;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f18\u5316\u65b9\u6848&#xff1a; \u4f7f\u7528 DocumentFragment&#xff08;\u6587\u6863\u788e\u7247&#xff09;\u3002\u5148\u5728\u5185\u5b58\u4e2d\u628a 1000 \u4e2a\u5143\u7d20\u62fc\u597d&#xff0c;\u6700\u540e\u4e00\u6b21\u6027\u63d2\u5165 DOM&#xff0c;\u53ea\u89e6\u53d1 1 \u6b21\u56de\u6d41\u3002<\/p>\n<p><span class=\"token keyword\">const<\/span> ul <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">getElementById<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;list&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">const<\/span> fragment <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">createDocumentFragment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u521b\u5efa\u4e00\u4e2a\u5185\u5b58\u4e2d\u7684\u201c\u9690\u5f62\u5bb9\u5668\u201d<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">const<\/span> li <span class=\"token operator\">&#061;<\/span> document<span class=\"token punctuation\">.<\/span><span class=\"token function\">createElement<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;li&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  li<span class=\"token punctuation\">.<\/span>innerText <span class=\"token operator\">&#061;<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">Item <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>i<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n  fragment<span class=\"token punctuation\">.<\/span><span class=\"token function\">appendChild<\/span><span class=\"token punctuation\">(<\/span>li<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6dfb\u52a0\u5230\u9690\u5f62\u5bb9\u5668\u4e2d&#xff0c;\u4e0d\u89e6\u53d1\u56de\u6d41<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>ul<span class=\"token punctuation\">.<\/span><span class=\"token function\">appendChild<\/span><span class=\"token punctuation\">(<\/span>fragment<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u4e00\u6b21\u6027\u628a 1000 \u4e2a li \u585e\u8fdb\u771f\u5b9e DOM&#xff0c;\u53ea\u89e6\u53d1 1 \u6b21\u56de\u6d41&#xff01;<\/span><\/p>\n<p>\u2463 \u52a8\u753b\u4f18\u5316&#xff08;\u4f7f\u7528 CSS3 \u6216 transform&#xff09;<\/p>\n<p>\u573a\u666f&#xff1a; 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