{"id":2354,"date":"2020-01-11T15:36:03","date_gmt":"2020-01-11T07:36:03","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=2354"},"modified":"2026-08-15T16:54:52","modified_gmt":"2026-08-15T08:54:52","slug":"%e6%b7%b1%e5%85%a5%e6%b5%85%e5%87%ba%e6%b5%8f%e8%a7%88%e5%99%a8%e6%b8%b2%e6%9f%93%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2354","title":{"rendered":"\u6df1\u5165\u6d45\u51fa\u6d4f\u89c8\u5668\u6e32\u67d3\u539f\u7406"},"content":{"rendered":"<h2><a href=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png\" rel=\"fancybox\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-3498\" src=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png\" alt=\"\" width=\"2151\" height=\"1105\" srcset=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png 2151w, https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image-768x395.png 768w, 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src=\"https:\/\/camo.githubusercontent.com\/72638d26319a92d5bc728a15d72eecb409aabceb\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f332f33312f313639643437303433376136633135613f773d35383726683d31313026663d67696626733d3938323337\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/3\/31\/169d470437a6c15a?w=587&amp;h=110&amp;f=gif&amp;s=98237\" \/><\/a><\/p>\n<ul>\n<li>\u4e8c\u662fCSS\uff0c\u89e3\u6790CSS\u4f1a\u4ea7\u751fCSS\u89c4\u5219\u6811\uff0c\u5b83\u548cDOM\u7ed3\u6784\u6bd4\u8f83\u50cf\u3002<\/li>\n<\/ul>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/73b3a71dc3ae11960dbbd30e5e44cdd53dc2eec4\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f332f33312f313639643437386130663462643136633f773d36363426683d31343626663d706e6726733d3332383833\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/73b3a71dc3ae11960dbbd30e5e44cdd53dc2eec4\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f332f33312f313639643437386130663462643136633f773d36363426683d31343626663d706e6726733d3332383833\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/3\/31\/169d478a0f4bd16c?w=664&amp;h=146&amp;f=png&amp;s=32883\" \/><\/a><\/p>\n<ul>\n<li>\u4e09\u662fJavascript\u811a\u672c\uff0c\u7b49\u5230Javascript \u811a\u672c\u6587\u4ef6\u52a0\u8f7d\u540e\uff0c \u901a\u8fc7 DOM API \u548c CSSOM API \u6765\u64cd\u4f5c DOM Tree \u548c CSS Rule Tree\u3002<\/li>\n<\/ul>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/a2de367e10d26912b98a4206dda0f9eb847d65c5\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f332f33312f313639643437383065306133666134343f773d35373926683d31393726663d67696626733d313434303837\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/a2de367e10d26912b98a4206dda0f9eb847d65c5\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f332f33312f313639643437383065306133666134343f773d35373926683d31393726663d67696626733d313434303837\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/3\/31\/169d4780e0a3fa44?w=579&amp;h=197&amp;f=gif&amp;s=144087\" \/><\/a><\/p>\n<h3>2\uff09\u89e3\u6790\u5b8c\u6210\u540e\uff0c\u6d4f\u89c8\u5668\u5f15\u64ce\u4f1a\u901a\u8fc7DOM Tree \u548c CSS Rule Tree \u6765\u6784\u9020 Rendering Tree\u3002<\/h3>\n<ul>\n<li>Rendering Tree \u6e32\u67d3\u6811\u5e76\u4e0d\u7b49\u540c\u4e8eDOM\u6811\uff0c\u6e32\u67d3\u6811\u53ea\u4f1a\u5305\u62ec\u9700\u8981\u663e\u793a\u7684\u8282\u70b9\u548c\u8fd9\u4e9b\u8282\u70b9\u7684\u6837\u5f0f\u4fe1\u606f\u3002<\/li>\n<li>CSS \u7684 Rule Tree\u4e3b\u8981\u662f\u4e3a\u4e86\u5b8c\u6210\u5339\u914d\u5e76\u628aCSS Rule\u9644\u52a0\u4e0aRendering 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\u8fd9\u4e9b\u5b57\u8282\u6570\u636e\u3002\u5f53\u6d4f\u89c8\u5668\u63a5\u6536\u5230\u8fd9\u4e9b\u5b57\u8282\u6570\u636e\u4ee5\u540e\uff0c\u5b83\u4f1a\u5c06\u8fd9\u4e9b\u5b57\u8282\u6570\u636e\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5199\u7684\u4ee3\u7801\u3002<\/p>\n<ul>\n<li>\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u6210Token\uff0c\u4f8b\u5982\uff1a<code>&lt;html&gt;<\/code>\u3001<code>&lt;body&gt;<\/code>\u7b49\u3002<strong>Token\u4e2d\u4f1a\u6807\u8bc6\u51fa\u5f53\u524dToken\u662f\u201c\u5f00\u59cb\u6807\u7b7e\u201d\u6216\u662f\u201c\u7ed3\u675f\u6807\u7b7e\u201d\u4ea6\u6216\u662f\u201c\u6587\u672c\u201d\u7b49\u4fe1\u606f<\/strong>\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u65f6\u5019\u4f60\u4e00\u5b9a\u4f1a\u6709\u7591\u95ee\uff0c\u8282\u70b9\u4e0e\u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u4f55\u7ef4\u62a4\uff1f<\/p>\n<p>\u4e8b\u5b9e\u4e0a\uff0c\u8fd9\u5c31\u662fToken\u8981\u6807\u8bc6\u201c\u8d77\u59cb\u6807\u7b7e\u201d\u548c\u201c\u7ed3\u675f\u6807\u7b7e\u201d\u7b49\u6807\u8bc6\u7684\u4f5c\u7528\u3002\u4f8b\u5982\u201ctitle\u201dToken\u7684\u8d77\u59cb\u6807\u7b7e\u548c\u7ed3\u675f\u6807\u7b7e\u4e4b\u95f4\u7684\u8282\u70b9\u80af\u5b9a\u662f\u5c5e\u4e8e\u201chead\u201d\u7684\u5b50\u8282\u70b9\u3002<br \/>\n<a href=\"https:\/\/camo.githubusercontent.com\/11a9f3294c5bdcec6a2de1e382b24cc10684b614\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663534613463653134396130353f773d36373126683d31363826663d706e6726733d3533313535\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/11a9f3294c5bdcec6a2de1e382b24cc10684b614\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663534613463653134396130353f773d36373126683d31363826663d706e6726733d3533313535\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/12\/28\/167f54a4ce149a05?w=671&amp;h=168&amp;f=png&amp;s=53155\" \/><\/a><\/p>\n<p>\u4e0a\u56fe\u7ed9\u51fa\u4e86\u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u4f8b\u5982\uff1a\u201cHello\u201dToken\u4f4d\u4e8e\u201ctitle\u201d\u5f00\u59cb\u6807\u7b7e\u4e0e\u201ctitle\u201d\u7ed3\u675f\u6807\u7b7e\u4e4b\u95f4\uff0c\u8868\u660e\u201cHello\u201dToken\u662f\u201ctitle\u201dToken\u7684\u5b50\u8282\u70b9\u3002\u540c\u7406\u201ctitle\u201dToken\u662f\u201chead\u201dToken\u7684\u5b50\u8282\u70b9\u3002<\/p>\n<ul>\n<li>\u751f\u6210\u8282\u70b9\u5bf9\u8c61\u5e76\u6784\u5efaDOM<\/li>\n<\/ul>\n<p>\u4e8b\u5b9e\u4e0a\uff0c\u6784\u5efaDOM\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4e0d\u662f\u7b49\u6240\u6709Token\u90fd\u8f6c\u6362\u5b8c\u6210\u540e\u518d\u53bb\u751f\u6210\u8282\u70b9\u5bf9\u8c61\uff0c\u800c\u662f\u4e00\u8fb9\u751f\u6210Token\u4e00\u8fb9\u6d88\u8017Token\u6765\u751f\u6210\u8282\u70b9\u5bf9\u8c61\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u6bcf\u4e2aToken\u88ab\u751f\u6210\u540e\uff0c\u4f1a\u7acb\u523b\u6d88\u8017\u8fd9\u4e2aToken\u521b\u5efa\u51fa\u8282\u70b9\u5bf9\u8c61\u3002<strong>\u6ce8\u610f\uff1a\u5e26\u6709\u7ed3\u675f\u6807\u7b7e\u6807\u8bc6\u7684Token\u4e0d\u4f1a\u521b\u5efa\u8282\u70b9\u5bf9\u8c61\u3002<\/strong><\/p>\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5047\u8bbe\u6709\u6bb5HTML\u6587\u672c\uff1a<\/p>\n<pre><code>&lt;html&gt;\n&lt;head&gt;\n    &lt;title&gt;Web page parsing&lt;\/title&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n    &lt;div&gt;\n        &lt;h1&gt;Web page parsing&lt;\/h1&gt;\n        &lt;p&gt;This is an example Web page.&lt;\/p&gt;\n    &lt;\/div&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;\n<\/code><\/pre>\n<p>\u4e0a\u9762\u8fd9\u6bb5HTML\u4f1a\u89e3\u6790\u6210\u8fd9\u6837\uff1a<\/p>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/e74e3c5913a32c7a899c669db06011e14aa3a8b0\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663532326534643463356532623f773d34363826683d33303826663d706e6726733d313230393137\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/e74e3c5913a32c7a899c669db06011e14aa3a8b0\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663532326534643463356532623f773d34363826683d33303826663d706e6726733d313230393137\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/12\/28\/167f522e4d4c5e2b?w=468&amp;h=308&amp;f=png&amp;s=120917\" \/><\/a><\/p>\n<h2>\u6784\u5efaCSSOM<\/h2>\n<p>DOM\u4f1a\u6355\u83b7\u9875\u9762\u7684\u5185\u5bb9\uff0c\u4f46\u6d4f\u89c8\u5668\u8fd8\u9700\u8981\u77e5\u9053\u9875\u9762\u5982\u4f55\u5c55\u793a\uff0c\u6240\u4ee5\u9700\u8981\u6784\u5efaCSSOM\u3002<\/p>\n<p>\u6784\u5efaCSSOM\u7684\u8fc7\u7a0b\u4e0e\u6784\u5efaDOM\u7684\u8fc7\u7a0b\u975e\u5e38\u76f8\u4f3c\uff0c\u5f53\u6d4f\u89c8\u5668\u63a5\u6536\u5230\u4e00\u6bb5CSS\uff0c\u6d4f\u89c8\u5668\u9996\u5148\u8981\u505a\u7684\u662f\u8bc6\u522b\u51faToken\uff0c\u7136\u540e\u6784\u5efa\u8282\u70b9\u5e76\u751f\u6210CSSOM\u3002<br \/>\n<a href=\"https:\/\/camo.githubusercontent.com\/0862f8004183487181f1fdf9f4c59a8b54075882\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663535616162616364346261633f773d36373926683d383526663d706e6726733d3332393736\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/0862f8004183487181f1fdf9f4c59a8b54075882\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663535616162616364346261633f773d36373926683d383526663d706e6726733d3332393736\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/12\/28\/167f55aabacd4bac?w=679&amp;h=85&amp;f=png&amp;s=32976\" \/><\/a><br \/>\n\u5728\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\uff0c\u6d4f\u89c8\u5668\u4f1a\u786e\u5b9a\u4e0b\u6bcf\u4e00\u4e2a\u8282\u70b9\u7684\u6837\u5f0f\u5230\u5e95\u662f\u4ec0\u4e48\uff0c\u5e76\u4e14\u8fd9\u4e00\u8fc7\u7a0b\u5176\u5b9e\u662f\u5f88\u6d88\u8017\u8d44\u6e90\u7684\u3002\u56e0\u4e3a\u6837\u5f0f\u4f60\u53ef\u4ee5\u81ea\u884c\u8bbe\u7f6e\u7ed9\u67d0\u4e2a\u8282\u70b9\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627f\u83b7\u5f97\u3002\u5728\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\uff0c\u6d4f\u89c8\u5668\u5f97\u9012\u5f52 CSSOM \u6811\uff0c\u7136\u540e\u786e\u5b9a\u5177\u4f53\u7684\u5143\u7d20\u5230\u5e95\u662f\u4ec0\u4e48\u6837\u5f0f\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1aCSS\u5339\u914dHTML\u5143\u7d20\u662f\u4e00\u4e2a\u76f8\u5f53\u590d\u6742\u548c\u6709\u6027\u80fd\u95ee\u9898\u7684\u4e8b\u60c5\u3002\u6240\u4ee5\uff0cDOM\u6811\u8981\u5c0f\uff0cCSS\u5c3d\u91cf\u7528id\u548cclass\uff0c\u5343\u4e07\u4e0d\u8981\u8fc7\u6e21\u5c42\u53e0\u4e0b\u53bb<\/strong>\u3002<\/p>\n<h2>\u6784\u5efa\u6e32\u67d3\u6811<\/h2>\n<p>\u5f53\u6211\u4eec\u751f\u6210 DOM \u6811\u548c CSSOM \u6811\u4ee5\u540e\uff0c\u5c31\u9700\u8981\u5c06\u8fd9\u4e24\u68f5\u6811\u7ec4\u5408\u4e3a\u6e32\u67d3\u6811\u3002<\/p>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/ae6a6d492332cd6332144f8e6c924d1197e26f7e\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663536353235323166656132663f773d36383926683d33323726663d706e6726733d313235303739\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/ae6a6d492332cd6332144f8e6c924d1197e26f7e\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663536353235323166656132663f773d36383926683d33323726663d706e6726733d313235303739\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/12\/28\/167f5652521fea2f?w=689&amp;h=327&amp;f=png&amp;s=125079\" \/><\/a><\/p>\n<p>\u5728\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\uff0c\u4e0d\u662f\u7b80\u5355\u7684\u5c06\u4e24\u8005\u5408\u5e76\u5c31\u884c\u4e86\u3002<strong>\u6e32\u67d3\u6811\u53ea\u4f1a\u5305\u62ec\u9700\u8981\u663e\u793a\u7684\u8282\u70b9\u548c\u8fd9\u4e9b\u8282\u70b9\u7684\u6837\u5f0f\u4fe1\u606f<\/strong>\uff0c\u5982\u679c\u67d0\u4e2a\u8282\u70b9\u662f\u00a0<code>display: none<\/code>\u00a0\u7684\uff0c\u90a3\u4e48\u5c31\u4e0d\u4f1a\u5728\u6e32\u67d3\u6811\u4e2d\u663e\u793a\u3002<\/p>\n<p>\u6211\u4eec\u6216\u8bb8\u6709\u4e2a\u7591\u60d1\uff1a<strong>\u6d4f\u89c8\u5668\u5982\u679c\u6e32\u67d3\u8fc7\u7a0b\u4e2d\u9047\u5230JS\u6587\u4ef6\u600e\u4e48\u5904\u7406<\/strong>\uff1f<\/p>\n<p>\u6e32\u67d3\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u9047\u5230<code>&lt;script&gt;<\/code>\u5c31\u505c\u6b62\u6e32\u67d3\uff0c\u6267\u884c JS \u4ee3\u7801\u3002\u56e0\u4e3a\u6d4f\u89c8\u5668\u6709GUI\u6e32\u67d3\u7ebf\u7a0b\u4e0eJS\u5f15\u64ce\u7ebf\u7a0b\uff0c\u4e3a\u4e86\u9632\u6b62\u6e32\u67d3\u51fa\u73b0\u4e0d\u53ef\u9884\u671f\u7684\u7ed3\u679c\uff0c\u8fd9\u4e24\u4e2a\u7ebf\u7a0b\u662f\u4e92\u65a5\u7684\u5173\u7cfb\u3002JavaScript\u7684\u52a0\u8f7d\u3001\u89e3\u6790\u4e0e\u6267\u884c\u4f1a\u963b\u585eDOM\u7684\u6784\u5efa\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u6784\u5efaDOM\u65f6\uff0cHTML\u89e3\u6790\u5668\u82e5\u9047\u5230\u4e86JavaScript\uff0c\u90a3\u4e48\u5b83\u4f1a\u6682\u505c\u6784\u5efaDOM\uff0c\u5c06\u63a7\u5236\u6743\u79fb\u4ea4\u7ed9JavaScript\u5f15\u64ce\uff0c\u7b49JavaScript\u5f15\u64ce\u8fd0\u884c\u5b8c\u6bd5\uff0c\u6d4f\u89c8\u5668\u518d\u4ece\u4e2d\u65ad\u7684\u5730\u65b9\u6062\u590dDOM\u6784\u5efa\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u4f60\u60f3\u9996\u5c4f\u6e32\u67d3\u7684\u8d8a\u5feb\uff0c\u5c31\u8d8a\u4e0d\u5e94\u8be5\u5728\u9996\u5c4f\u5c31\u52a0\u8f7d JS \u6587\u4ef6\uff0c\u8fd9\u4e5f\u662f\u90fd\u5efa\u8bae\u5c06 script \u6807\u7b7e\u653e\u5728 body \u6807\u7b7e\u5e95\u90e8\u7684\u539f\u56e0\u3002\u5f53\u7136\u5728\u5f53\u4e0b\uff0c\u5e76\u4e0d\u662f\u8bf4 script \u6807\u7b7e\u5fc5\u987b\u653e\u5728\u5e95\u90e8\uff0c\u56e0\u4e3a\u4f60\u53ef\u4ee5\u7ed9 script \u6807\u7b7e\u6dfb\u52a0 defer \u6216\u8005 async \u5c5e\u6027\uff08\u4e0b\u6587\u4f1a\u4ecb\u7ecd\u8fd9\u4e24\u8005\u7684\u533a\u522b\uff09\u3002<\/p>\n<p><strong>JS\u6587\u4ef6\u4e0d\u53ea\u662f\u963b\u585eDOM\u7684\u6784\u5efa\uff0c\u5b83\u4f1a\u5bfc\u81f4CSSOM\u4e5f\u963b\u585eDOM\u7684\u6784\u5efa<\/strong>\u3002<\/p>\n<p>\u539f\u672cDOM\u548cCSSOM\u7684\u6784\u5efa\u662f\u4e92\u4e0d\u5f71\u54cd\uff0c\u4e95\u6c34\u4e0d\u72af\u6cb3\u6c34\uff0c\u4f46\u662f\u4e00\u65e6\u5f15\u5165\u4e86JavaScript\uff0cCSSOM\u4e5f\u5f00\u59cb\u963b\u585eDOM\u7684\u6784\u5efa\uff0c\u53ea\u6709CSSOM\u6784\u5efa\u5b8c\u6bd5\u540e\uff0cDOM\u518d\u6062\u590dDOM\u6784\u5efa\u3002<\/p>\n<p>\u8fd9\u662f\u4ec0\u4e48\u60c5\u51b5\uff1f<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3aJavaScript\u4e0d\u53ea\u662f\u53ef\u4ee5\u6539DOM\uff0c\u5b83\u8fd8\u53ef\u4ee5\u66f4\u6539\u6837\u5f0f\uff0c\u4e5f\u5c31\u662f\u5b83\u53ef\u4ee5\u66f4\u6539CSSOM\u3002\u56e0\u4e3a\u4e0d\u5b8c\u6574\u7684CSSOM\u662f\u65e0\u6cd5\u4f7f\u7528\u7684\uff0c\u5982\u679cJavaScript\u60f3\u8bbf\u95eeCSSOM\u5e76\u66f4\u6539\u5b83\uff0c\u90a3\u4e48\u5728\u6267\u884cJavaScript\u65f6\uff0c\u5fc5\u987b\u8981\u80fd\u62ff\u5230\u5b8c\u6574\u7684CSSOM\u3002\u6240\u4ee5\u5c31\u5bfc\u81f4\u4e86\u4e00\u4e2a\u73b0\u8c61\uff0c\u5982\u679c\u6d4f\u89c8\u5668\u5c1a\u672a\u5b8c\u6210CSSOM\u7684\u4e0b\u8f7d\u548c\u6784\u5efa\uff0c\u800c\u6211\u4eec\u5374\u60f3\u5728\u6b64\u65f6\u8fd0\u884c\u811a\u672c\uff0c\u90a3\u4e48\u6d4f\u89c8\u5668\u5c06\u5ef6\u8fdf\u811a\u672c\u6267\u884c\u548cDOM\u6784\u5efa\uff0c\u76f4\u81f3\u5176\u5b8c\u6210CSSOM\u7684\u4e0b\u8f7d\u548c\u6784\u5efa\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c<strong>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6d4f\u89c8\u5668\u4f1a\u5148\u4e0b\u8f7d\u548c\u6784\u5efaCSSOM\uff0c\u7136\u540e\u518d\u6267\u884cJavaScript\uff0c\u6700\u540e\u5728\u7ee7\u7eed\u6784\u5efaDOM<\/strong>\u3002<\/p>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/13fc7d779004098ba4568b81920da5857a8b5ec7\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f342f322f313639646562646430396565636361613f773d36383926683d32303926663d706e6726733d3531333132\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/13fc7d779004098ba4568b81920da5857a8b5ec7\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f342f322f313639646562646430396565636361613f773d36383926683d32303926663d706e6726733d3531333132\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/4\/2\/169debdd09eeccaa?w=689&amp;h=209&amp;f=png&amp;s=51312\" 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decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/78835bfd6ba8899decaabec54b713bced79907c2\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f362f31362f313634303635366537303736356163373f773d36383926683d31313226663d6a70656726733d3136383935\" alt=\"async\u548cdefer\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/6\/16\/1640656e70765ac7?w=689&amp;h=112&amp;f=jpeg&amp;s=16895\" \/><\/a><\/p>\n<p>\u5176\u4e2d\u84dd\u8272\u7ebf\u4ee3\u8868JavaScript\u52a0\u8f7d\uff1b\u7ea2\u8272\u7ebf\u4ee3\u8868JavaScript\u6267\u884c\uff1b\u7eff\u8272\u7ebf\u4ee3\u8868 HTML \u89e3\u6790\u3002<\/p>\n<h3>1\uff09\u60c5\u51b51<code>&lt;script src=\"script.js\"&gt;&lt;\/script&gt;<\/code><\/h3>\n<p>\u6ca1\u6709 defer \u6216 async\uff0c\u6d4f\u89c8\u5668\u4f1a\u7acb\u5373\u52a0\u8f7d\u5e76\u6267\u884c\u6307\u5b9a\u7684\u811a\u672c\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e0d\u7b49\u5f85\u540e\u7eed\u8f7d\u5165\u7684\u6587\u6863\u5143\u7d20\uff0c\u8bfb\u5230\u5c31\u52a0\u8f7d\u5e76\u6267\u884c\u3002<\/p>\n<h3>2\uff09\u60c5\u51b52<code>&lt;script async src=\"script.js\"&gt;&lt;\/script&gt;<\/code>\u00a0(<strong>\u5f02\u6b65\u4e0b\u8f7d<\/strong>)<\/h3>\n<p>async \u5c5e\u6027\u8868\u793a\u5f02\u6b65\u6267\u884c\u5f15\u5165\u7684 JavaScript\uff0c\u4e0e defer \u7684\u533a\u522b\u5728\u4e8e\uff0c\u5982\u679c\u5df2\u7ecf\u52a0\u8f7d\u597d\uff0c\u5c31\u4f1a\u5f00\u59cb\u6267\u884c\u2014\u2014\u65e0\u8bba\u6b64\u523b\u662f HTML \u89e3\u6790\u9636\u6bb5\u8fd8\u662f DOMContentLoaded \u89e6\u53d1\u4e4b\u540e\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u79cd\u65b9\u5f0f\u52a0\u8f7d\u7684 JavaScript \u4f9d\u7136\u4f1a\u963b\u585e load \u4e8b\u4ef6\u3002\u6362\u53e5\u8bdd\u8bf4\uff0casync-script \u53ef\u80fd\u5728 DOMContentLoaded \u89e6\u53d1\u4e4b\u524d\u6216\u4e4b\u540e\u6267\u884c\uff0c\u4f46\u4e00\u5b9a\u5728 load \u89e6\u53d1\u4e4b\u524d\u6267\u884c\u3002<\/p>\n<h3>3\uff09\u60c5\u51b53\u00a0<code>&lt;script defer src=\"script.js\"&gt;&lt;\/script&gt;<\/code>(<strong>\u5ef6\u8fdf\u6267\u884c<\/strong>)<\/h3>\n<p>defer \u5c5e\u6027\u8868\u793a\u5ef6\u8fdf\u6267\u884c\u5f15\u5165\u7684 JavaScript\uff0c\u5373\u8fd9\u6bb5 JavaScript \u52a0\u8f7d\u65f6 HTML \u5e76\u672a\u505c\u6b62\u89e3\u6790\uff0c\u8fd9\u4e24\u4e2a\u8fc7\u7a0b\u662f\u5e76\u884c\u7684\u3002\u6574\u4e2a document \u89e3\u6790\u5b8c\u6bd5\u4e14 defer-script \u4e5f\u52a0\u8f7d\u5b8c\u6210\u4e4b\u540e\uff08\u8fd9\u4e24\u4ef6\u4e8b\u60c5\u7684\u987a\u5e8f\u65e0\u5173\uff09\uff0c\u4f1a\u6267\u884c\u6240\u6709\u7531 defer-script \u52a0\u8f7d\u7684 JavaScript \u4ee3\u7801\uff0c\u7136\u540e\u89e6\u53d1 DOMContentLoaded \u4e8b\u4ef6\u3002<\/p>\n<p>defer \u4e0e\u76f8\u6bd4\u666e\u901a script\uff0c\u6709\u4e24\u70b9\u533a\u522b\uff1a<strong>\u8f7d\u5165 JavaScript \u6587\u4ef6\u65f6\u4e0d\u963b\u585e HTML \u7684\u89e3\u6790\uff0c\u6267\u884c\u9636\u6bb5\u88ab\u653e\u5230 HTML \u6807\u7b7e\u89e3\u6790\u5b8c\u6210\u4e4b\u540e\u3002<br \/>\n\u5728\u52a0\u8f7d\u591a\u4e2aJS\u811a\u672c\u7684\u65f6\u5019\uff0casync\u662f\u65e0\u987a\u5e8f\u7684\u52a0\u8f7d\uff0c\u800cdefer\u662f\u6709\u987a\u5e8f\u7684\u52a0\u8f7d\u3002<\/strong><\/p>\n<h3>2.\u4e3a\u4ec0\u4e48\u64cd\u4f5c DOM \u6162<\/h3>\n<p>\u628a DOM \u548c JavaScript \u5404\u81ea\u60f3\u8c61\u6210\u4e00\u4e2a\u5c9b\u5c7f\uff0c\u5b83\u4eec\u4e4b\u95f4\u7528\u6536\u8d39\u6865\u6881\u8fde\u63a5\u3002\u2014\u2014\u300a\u9ad8\u6027\u80fd JavaScript\u300b<\/p>\n<p>JS \u662f\u5f88\u5feb\u7684\uff0c\u5728 JS \u4e2d\u4fee\u6539 DOM \u5bf9\u8c61\u4e5f\u662f\u5f88\u5feb\u7684\u3002\u5728JS\u7684\u4e16\u754c\u91cc\uff0c\u4e00\u5207\u662f\u7b80\u5355\u7684\u3001\u8fc5\u901f\u7684\u3002\u4f46 DOM \u64cd\u4f5c\u5e76\u975e JS 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noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/893b42df58916e5f473947f19db42ce3931b4188\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f342f332f313639653364633063346134333866643f773d35373826683d31383826663d706e6726733d3431323633\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/4\/3\/169e3dc0c4a438fd?w=578&amp;h=188&amp;f=png&amp;s=41263\" \/><\/a><\/p>\n<p>\u8fc7\u201c\u6865\u201d\u8981\u6536\u8d39\u2014\u2014\u8fd9\u4e2a\u5f00\u9500\u672c\u8eab\u5c31\u662f\u4e0d\u53ef\u5ffd\u7565\u7684\u3002\u6211\u4eec\u6bcf\u64cd\u4f5c\u4e00\u6b21 DOM\uff08\u4e0d\u7ba1\u662f\u4e3a\u4e86\u4fee\u6539\u8fd8\u662f\u4ec5\u4ec5\u4e3a\u4e86\u8bbf\u95ee\u5176\u503c\uff09\uff0c\u90fd\u8981\u8fc7\u4e00\u6b21\u201c\u6865\u201d\u3002\u8fc7\u201c\u6865\u201d\u7684\u6b21\u6570\u4e00\u591a\uff0c\u5c31\u4f1a\u4ea7\u751f\u6bd4\u8f83\u660e\u663e\u7684\u6027\u80fd\u95ee\u9898\u3002\u56e0\u6b64\u201c\u51cf\u5c11 DOM 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src=\"https:\/\/camo.githubusercontent.com\/1a81ec348a720a4e1682432accc800e5a215106e\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031382f31322f32382f313637663036386534646536633763653f773d37313326683d31393526663d706e6726733d313433383132\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2018\/12\/28\/167f068e4de6c7ce?w=713&amp;h=195&amp;f=png&amp;s=143812\" \/><\/a><\/p>\n<p>\u6ce8\u610f\uff1a\u4e0a\u56fe\u6d41\u7a0b\u4e2d\u6709\u5f88\u591a\u8fde\u63a5\u7ebf\uff0c\u8fd9\u8868\u793a\u4e86Javascript\u52a8\u6001\u4fee\u6539\u4e86DOM\u5c5e\u6027\u6216\u662fCSS\u5c5e\u6027\u4f1a\u5bfc\u81f4\u91cd\u65b0Layout\uff0c\u4f46\u6709\u4e9b\u6539\u53d8\u4e0d\u4f1a\u91cd\u65b0Layout\uff0c\u5c31\u662f\u4e0a\u56fe\u4e2d\u90a3\u4e9b\u6307\u5230\u5929\u4e0a\u7684\u7bad\u5934\uff0c\u6bd4\u5982\u4fee\u6539\u540e\u7684CSS rule\u6ca1\u6709\u88ab\u5339\u914d\u5230\u5143\u7d20\u3002<\/p>\n<p>\u8fd9\u91cc\u91cd\u8981\u8981\u8bf4\u4e24\u4e2a\u6982\u5ff5\uff0c\u4e00\u4e2a\u662fReflow\uff0c\u53e6\u4e00\u4e2a\u662fRepaint<\/p>\n<ul>\n<li>\u91cd\u7ed8\uff1a\u5f53\u6211\u4eec\u5bf9 DOM \u7684\u4fee\u6539\u5bfc\u81f4\u4e86\u6837\u5f0f\u7684\u53d8\u5316\u3001\u5374\u5e76\u672a\u5f71\u54cd\u5176\u51e0\u4f55\u5c5e\u6027\uff08\u6bd4\u5982\u4fee\u6539\u4e86\u989c\u8272\u6216\u80cc\u666f\u8272\uff09\u65f6\uff0c\u6d4f\u89c8\u5668\u4e0d\u9700\u91cd\u65b0\u8ba1\u7b97\u5143\u7d20\u7684\u51e0\u4f55\u5c5e\u6027\u3001\u76f4\u63a5\u4e3a\u8be5\u5143\u7d20\u7ed8\u5236\u65b0\u7684\u6837\u5f0f\uff08\u8df3\u8fc7\u4e86\u4e0a\u56fe\u6240\u793a\u7684\u56de\u6d41\u73af\u8282\uff09\u3002<\/li>\n<li>\u56de\u6d41\uff1a\u5f53\u6211\u4eec\u5bf9 DOM \u7684\u4fee\u6539\u5f15\u53d1\u4e86 DOM \u51e0\u4f55\u5c3a\u5bf8\u7684\u53d8\u5316\uff08\u6bd4\u5982\u4fee\u6539\u5143\u7d20\u7684\u5bbd\u3001\u9ad8\u6216\u9690\u85cf\u5143\u7d20\u7b49\uff09\u65f6\uff0c\u6d4f\u89c8\u5668\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5143\u7d20\u7684\u51e0\u4f55\u5c5e\u6027\uff08\u5176\u4ed6\u5143\u7d20\u7684\u51e0\u4f55\u5c5e\u6027\u548c\u4f4d\u7f6e\u4e5f\u4f1a\u56e0\u6b64\u53d7\u5230\u5f71\u54cd\uff09\uff0c\u7136\u540e\u518d\u5c06\u8ba1\u7b97\u7684\u7ed3\u679c\u7ed8\u5236\u51fa\u6765\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u662f\u56de\u6d41\uff08\u4e5f\u53eb\u91cd\u6392\uff09<\/li>\n<\/ul>\n<p>\u6211\u4eec\u77e5\u9053\uff0c\u5f53\u7f51\u9875\u751f\u6210\u7684\u65f6\u5019\uff0c\u81f3\u5c11\u4f1a\u6e32\u67d3\u4e00\u6b21\u3002\u5728\u7528\u6237\u8bbf\u95ee\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8fd8\u4f1a\u4e0d\u65ad\u91cd\u65b0\u6e32\u67d3\u3002\u91cd\u65b0\u6e32\u67d3\u4f1a\u91cd\u590d\u56de\u6d41+\u91cd\u7ed8\u6216\u8005\u53ea\u6709\u91cd\u7ed8\u3002<br \/>\n<strong>\u56de\u6d41\u5fc5\u5b9a\u4f1a\u53d1\u751f\u91cd\u7ed8\uff0c\u91cd\u7ed8\u4e0d\u4e00\u5b9a\u4f1a\u5f15\u53d1\u56de\u6d41<\/strong>\u3002\u91cd\u7ed8\u548c\u56de\u6d41\u4f1a\u5728\u6211\u4eec\u8bbe\u7f6e\u8282\u70b9\u6837\u5f0f\u65f6\u9891\u7e41\u51fa\u73b0\uff0c\u540c\u65f6\u4e5f\u4f1a\u5f88\u5927\u7a0b\u5ea6\u4e0a\u5f71\u54cd\u6027\u80fd\u3002\u56de\u6d41\u6240\u9700\u7684\u6210\u672c\u6bd4\u91cd\u7ed8\u9ad8\u7684\u591a\uff0c\u6539\u53d8\u7236\u8282\u70b9\u91cc\u7684\u5b50\u8282\u70b9\u5f88\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7236\u8282\u70b9\u7684\u4e00\u7cfb\u5217\u56de\u6d41\u3002<\/p>\n<h3>1\uff09\u5e38\u89c1\u5f15\u8d77\u56de\u6d41\u5c5e\u6027\u548c\u65b9\u6cd5<\/h3>\n<p>\u4efb\u4f55\u4f1a\u6539\u53d8\u5143\u7d20\u51e0\u4f55\u4fe1\u606f(\u5143\u7d20\u7684\u4f4d\u7f6e\u548c\u5c3a\u5bf8\u5927\u5c0f)\u7684\u64cd\u4f5c\uff0c\u90fd\u4f1a\u89e6\u53d1\u56de\u6d41\uff0c<\/p>\n<ul>\n<li>\u6dfb\u52a0\u6216\u8005\u5220\u9664\u53ef\u89c1\u7684DOM\u5143\u7d20\uff1b<\/li>\n<li>\u5143\u7d20\u5c3a\u5bf8\u6539\u53d8\u2014\u2014\u8fb9\u8ddd\u3001\u586b\u5145\u3001\u8fb9\u6846\u3001\u5bbd\u5ea6\u548c\u9ad8\u5ea6<\/li>\n<li>\u5185\u5bb9\u53d8\u5316\uff0c\u6bd4\u5982\u7528\u6237\u5728input\u6846\u4e2d\u8f93\u5165\u6587\u5b57<\/li>\n<li>\u6d4f\u89c8\u5668\u7a97\u53e3\u5c3a\u5bf8\u6539\u53d8\u2014\u2014resize\u4e8b\u4ef6\u53d1\u751f\u65f6<\/li>\n<li>\u8ba1\u7b97 offsetWidth \u548c offsetHeight \u5c5e\u6027<\/li>\n<li>\u8bbe\u7f6e style \u5c5e\u6027\u7684\u503c<\/li>\n<\/ul>\n<h3>2\uff09\u5e38\u89c1\u5f15\u8d77\u91cd\u7ed8\u5c5e\u6027\u548c\u65b9\u6cd5<\/h3>\n<p><a href=\"https:\/\/camo.githubusercontent.com\/3a47ae7448b98eb5bf0152af6c0816b1ff103bb6\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f312f312f313638303964386536343832623831333f773d35353426683d32333526663d706e6726733d3132303735\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" src=\"https:\/\/camo.githubusercontent.com\/3a47ae7448b98eb5bf0152af6c0816b1ff103bb6\/68747470733a2f2f757365722d676f6c642d63646e2e786974752e696f2f323031392f312f312f313638303964386536343832623831333f773d35353426683d32333526663d706e6726733d3132303735\" alt=\"\" data-canonical-src=\"https:\/\/user-gold-cdn.xitu.io\/2019\/1\/1\/16809d8e6482b813?w=554&amp;h=235&amp;f=png&amp;s=12075\" \/><\/a><\/p>\n<h3>3\uff09\u5982\u4f55\u51cf\u5c11\u56de\u6d41\u3001\u91cd\u7ed8<\/h3>\n<ul>\n<li>\u4f7f\u7528 transform \u66ff\u4ee3 top<\/li>\n<li>\u4f7f\u7528 visibility \u66ff\u6362 display: none \uff0c\u56e0\u4e3a\u524d\u8005\u53ea\u4f1a\u5f15\u8d77\u91cd\u7ed8\uff0c\u540e\u8005\u4f1a\u5f15\u53d1\u56de\u6d41\uff08\u6539\u53d8\u4e86\u5e03\u5c40\uff09<\/li>\n<li>\u4e0d\u8981\u628a\u8282\u70b9\u7684\u5c5e\u6027\u503c\u653e\u5728\u4e00\u4e2a\u5faa\u73af\u91cc\u5f53\u6210\u5faa\u73af\u91cc\u7684\u53d8\u91cf\u3002<\/li>\n<\/ul>\n<pre><code>for(let i = 0; i &lt; 1000; i++) {\n    \/\/ \u83b7\u53d6 offsetTop \u4f1a\u5bfc\u81f4\u56de\u6d41\uff0c\u56e0\u4e3a\u9700\u8981\u53bb\u83b7\u53d6\u6b63\u786e\u7684\u503c\n    console.log(document.querySelector('.test').style.offsetTop)\n}\n<\/code><\/pre>\n<ul>\n<li>\u4e0d\u8981\u4f7f\u7528 table \u5e03\u5c40\uff0c\u53ef\u80fd\u5f88\u5c0f\u7684\u4e00\u4e2a\u5c0f\u6539\u52a8\u4f1a\u9020\u6210\u6574\u4e2a table \u7684\u91cd\u65b0\u5e03\u5c40<\/li>\n<li>\u52a8\u753b\u5b9e\u73b0\u7684\u901f\u5ea6\u7684\u9009\u62e9\uff0c\u52a8\u753b\u901f\u5ea6\u8d8a\u5feb\uff0c\u56de\u6d41\u6b21\u6570\u8d8a\u591a\uff0c\u4e5f\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528 requestAnimationFrame<\/li>\n<li>CSS \u9009\u62e9\u7b26\u4ece\u53f3\u5f80\u5de6\u5339\u914d\u67e5\u627e\uff0c\u907f\u514d\u8282\u70b9\u5c42\u7ea7\u8fc7\u591a<\/li>\n<li>\u5c06\u9891\u7e41\u91cd\u7ed8\u6216\u8005\u56de\u6d41\u7684\u8282\u70b9\u8bbe\u7f6e\u4e3a\u56fe\u5c42\uff0c\u56fe\u5c42\u80fd\u591f\u963b\u6b62\u8be5\u8282\u70b9\u7684\u6e32\u67d3\u884c\u4e3a\u5f71\u54cd\u522b\u7684\u8282\u70b9\u3002\u6bd4\u5982\u5bf9\u4e8e video \u6807\u7b7e\u6765\u8bf4\uff0c\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u5c06\u8be5\u8282\u70b9\u53d8\u4e3a\u56fe\u5c42\u3002<\/li>\n<\/ul>\n<h2>\u6027\u80fd\u4f18\u5316\u7b56\u7565<\/h2>\n<p>\u57fa\u4e8e\u4e0a\u9762\u4ecb\u7ecd\u7684\u6d4f\u89c8\u5668\u6e32\u67d3\u539f\u7406\uff0cDOM \u548c CSSOM \u7ed3\u6784\u6784\u5efa\u987a\u5e8f\uff0c\u521d\u59cb\u5316\u53ef\u4ee5\u5bf9\u9875\u9762\u6e32\u67d3\u505a\u4e9b\u4f18\u5316\uff0c\u63d0\u5347\u9875\u9762\u6027\u80fd\u3002<\/p>\n<ul>\n<li>JS\u4f18\u5316\uff1a\u00a0<code>&lt;script&gt;<\/code>\u00a0\u6807\u7b7e\u52a0\u4e0a defer\u5c5e\u6027 \u548c async\u5c5e\u6027 \u7528\u4e8e\u5728\u4e0d\u963b\u585e\u9875\u9762\u6587\u6863\u89e3\u6790\u7684\u524d\u63d0\u4e0b\uff0c\u63a7\u5236\u811a\u672c\u7684\u4e0b\u8f7d\u548c\u6267\u884c\u3002\n<ul>\n<li>defer\u5c5e\u6027\uff1a \u7528\u4e8e\u5f00\u542f\u65b0\u7684\u7ebf\u7a0b\u4e0b\u8f7d\u811a\u672c\u6587\u4ef6\uff0c\u5e76\u4f7f\u811a\u672c\u5728\u6587\u6863\u89e3\u6790\u5b8c\u6210\u540e\u6267\u884c\u3002<\/li>\n<li>async\u5c5e\u6027\uff1a HTML5\u65b0\u589e\u5c5e\u6027\uff0c\u7528\u4e8e\u5f02\u6b65\u4e0b\u8f7d\u811a\u672c\u6587\u4ef6\uff0c\u4e0b\u8f7d\u5b8c\u6bd5\u7acb\u5373\u89e3\u91ca\u6267\u884c\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<\/li>\n<li>CSS\u4f18\u5316\uff1a\u00a0<code>&lt;link&gt;<\/code>\u00a0\u6807\u7b7e\u7684 rel\u5c5e\u6027 \u4e2d\u7684\u5c5e\u6027\u503c\u8bbe\u7f6e\u4e3a preload \u80fd\u591f\u8ba9\u4f60\u5728\u4f60\u7684HTML\u9875\u9762\u4e2d\u53ef\u4ee5\u6307\u660e\u54ea\u4e9b\u8d44\u6e90\u662f\u5728\u9875\u9762\u52a0\u8f7d\u5b8c\u6210\u540e\u5373\u523b\u9700\u8981\u7684,\u6700\u4f18\u7684\u914d\u7f6e\u52a0\u8f7d\u987a\u5e8f\uff0c\u63d0\u9ad8\u6e32\u67d3\u6027\u80fd<\/li>\n<\/ul>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u6211\u4eec\u5f97\u51fa\u8fd9\u6837\u7684\u7ed3\u8bba\uff1a<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u5de5\u4f5c\u6d41\u7a0b\uff1a\u6784\u5efaDOM -&gt; \u6784\u5efaCSSOM -&gt; \u6784\u5efa\u6e32\u67d3\u6811 -&gt; \u5e03\u5c40 -&gt; \u7ed8\u5236\u3002<\/li>\n<li>CSSOM\u4f1a\u963b\u585e\u6e32\u67d3\uff0c\u53ea\u6709\u5f53CSSOM\u6784\u5efa\u5b8c\u6bd5\u540e\u624d\u4f1a\u8fdb\u5165\u4e0b\u4e00\u4e2a\u9636\u6bb5\u6784\u5efa\u6e32\u67d3\u6811\u3002<\/li>\n<li>\u901a\u5e38\u60c5\u51b5\u4e0bDOM\u548cCSSOM\u662f\u5e76\u884c\u6784\u5efa\u7684\uff0c\u4f46\u662f\u5f53\u6d4f\u89c8\u5668\u9047\u5230\u4e00\u4e2a\u4e0d\u5e26defer\u6216async\u5c5e\u6027\u7684script\u6807\u7b7e\u65f6\uff0cDOM\u6784\u5efa\u5c06\u6682\u505c\uff0c\u5982\u679c\u6b64\u65f6\u53c8\u6070\u5de7\u6d4f\u89c8\u5668\u5c1a\u672a\u5b8c\u6210CSSOM\u7684\u4e0b\u8f7d\u548c\u6784\u5efa\uff0c\u7531\u4e8eJavaScript\u53ef\u4ee5\u4fee\u6539CSSOM\uff0c\u6240\u4ee5\u9700\u8981\u7b49CSSOM\u6784\u5efa\u5b8c\u6bd5\u540e\u518d\u6267\u884cJS\uff0c\u6700\u540e\u624d\u91cd\u65b0DOM\u6784\u5efa<\/li>\n<\/ul>\n<p>\u8f6c\u81f3:<a href=\"https:\/\/github.com\/ljianshu\/Blog\/issues\/51\">https:\/\/github.com\/ljianshu\/Blog\/issues\/51<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u6d4f\u89c8\u5668\u7684\u5185\u6838\u662f\u6307\u652f\u6301\u6d4f\u89c8\u5668\u8fd0\u884c\u7684\u6700\u6838\u5fc3\u7684\u7a0b\u5e8f\uff0c\u5206\u4e3a\u4e24\u4e2a\u90e8\u5206\u7684\uff0c\u4e00\u662f\u6e32\u67d3\u5f15\u64ce\uff0c\u53e6\u4e00\u4e2a\u662fJS\u5f15\u64ce\u3002\u6e32\u67d3\u5f15\u64ce\u5728 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[105],"tags":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2354"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2354"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2354\/revisions"}],"predecessor-version":[{"id":3547,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2354\/revisions\/3547"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}