{"id":13820,"date":"2021-12-07T16:16:00","date_gmt":"2021-12-07T09:16:00","guid":{"rendered":"https:\/\/kiencang.net\/?p=13820"},"modified":"2023-07-23T19:40:58","modified_gmt":"2023-07-23T12:40:58","slug":"critical-css-wordpress","status":"publish","type":"post","link":"https:\/\/kiencang.net\/critical-css-wordpress\/","title":{"rendered":"Critical CSS l\u00e0 g\u00ec? C\u00e1ch tr\u00edch xu\u1ea5t critical CSS trong WordPress?"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d6573b97e\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d6573b97e\"  type=\"checkbox\" id=\"item-6577d6573b97e\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#1_Hieu_ve_ban_chat_cua_CSS_trong_WordPress\" title=\"#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress\">#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#2_Duong_dan_CSS_quan_trong_la_gi\" title=\"#2. \u0110\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u00e0 g\u00ec?\">#2. \u0110\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#3_Tai_sao_duong_dan_CSS_quan_trong_lai_co_nhieu_y_nghia_den_vay\" title=\"#3. T\u1ea1i sao \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u1ea1i c\u00f3 nhi\u1ec1u \u00fd ngh\u0129a \u0111\u1ebfn v\u1eady?\">#3. T\u1ea1i sao \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u1ea1i c\u00f3 nhi\u1ec1u \u00fd ngh\u0129a \u0111\u1ebfn v\u1eady?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#4_Lam_the_nao_de_tao_ra_duoc_CSS_quan_trong_trong_WordPress\" title=\"#4. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c CSS quan tr\u1ecdng trong WordPress?\">#4. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c CSS quan tr\u1ecdng trong WordPress?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#5_Tai_sao_ban_than_WordPress_khong_the_tao_ra_duoc_critical_CSS\" title=\"#5. T\u1ea1i sao b\u1ea3n th\u00e2n WordPress kh\u00f4ng th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c critical CSS\">#5. T\u1ea1i sao b\u1ea3n th\u00e2n WordPress kh\u00f4ng th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c critical CSS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/#6_Ket_luan\" title=\"#6. K\u1ebft lu\u1eadn\">#6. K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"hi\u1ec3u-v\u1ec1-b\u1ea3n-ch\u1ea5t-c\u1ee7a-css-trong-wordpress\"><span class=\"ez-toc-section\" id=\"1_Hieu_ve_ban_chat_cua_CSS_trong_WordPress\"><\/span>#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1ch CSS (th\u00f4ng th\u01b0\u1eddng) s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong WordPress.<\/p>\n\n\n\n<p>M\u1ecdi giao di\u1ec7n (theme) WordPress \u0111\u1ec1u bao g\u1ed3m m\u1ed9t file <em>style.css<\/em> bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c \u0111o\u1ea1n m\u00e3 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o style cho website c\u1ee7a b\u1ea1n. <\/p>\n\n\n\n<p>Nh\u00e0 ph\u00e1t tri\u1ec3n theme c\u1ea7n h\u1ed7 tr\u1ee3 t\u1ea5t c\u1ea3 c\u00e1c t\u00ednh n\u0103ng c\u1ee7a WordPress bao g\u1ed3m b\u00e0i \u0111\u0103ng blog, b\u00ecnh lu\u1eadn, trang s\u1ea3n ph\u1ea9m, trang th\u00e0nh vi\u00ean, form, v\u00e2n v\u00e2n. C\u00e1c plugin kh\u00e1c m\u00e0 b\u1ea1n c\u00e0i c\u0169ng c\u00f3 th\u1ec3 th\u00eam c\u00e1c style css t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m file CSS ph\u00ecnh to ra v\u00e0 c\u00f3 k\u00edch c\u1ee1 l\u00ean \u0111\u1ebfn 200KB ho\u1eb7c th\u1eadm ch\u00ed c\u00f2n cao h\u01a1n n\u1eefa.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"d\u01b0\u1eddng-d\u1eabn-css-quan-tr\u1ecdng-la-gi\"><span class=\"ez-toc-section\" id=\"2_Duong_dan_CSS_quan_trong_la_gi\"><\/span>#2. \u0110\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Khi file CSS c\u1ee7a b\u1ea1n l\u1edbn d\u1ea7n l\u00ean, tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n ph\u1ea3i t\u1ea3i nh\u1eefng file l\u1edbn n\u00e0y, ph\u00e2n t\u00edch n\u00f3 v\u00e0 t\u1eeb \u0111\u1ea5y <a href=\"https:\/\/kiencang.net\/cach-trang-web-tai-va-hien-thi\/\" target=\"_blank\" rel=\"noreferrer noopener\">render (k\u1ebft xu\u1ea5t \/ hi\u1ec3n th\u1ecb) website<\/a>. N\u00f3 c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft t\u1edbi v\u1edbi t\u00ean g\u1ecdi ch\u1eb7n hi\u1ec3n th\u1ecb (render-blocking \/ b\u1ea3n ch\u1ea5t c\u1ee7a CSS l\u00e0 ch\u1eb7n hi\u1ec3n th\u1ecb). <\/p>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y c\u0169ng l\u00e0m gia t\u0103ng FCP (<a href=\"https:\/\/kiencang.net\/first-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">First Contentful Paint<\/a> &#8211; Th\u1eddi gian \u0111o l\u01b0\u1eddng khi ng\u01b0\u1eddi d\u00f9ng nh\u00ecn th\u1ea5y h\u00ecnh \u1ea3nh ph\u1ea3n h\u1ed3i \u0111\u1ea7u ti\u00ean t\u1eeb trang) v\u00e0 FMP (First Meaningful Paint &#8211; Th\u1eddi gian \u0111o l\u01b0\u1eddng khi ng\u01b0\u1eddi d\u00f9ng nh\u00ecn th\u1ea5y n\u1ed9i dung ch\u00ednh c\u1ee7a trang, c\u00f3 v\u1ebb nh\u01b0 Google \u0111\u00e3 ph\u00e1t tri\u1ec3n m\u1ed9t ch\u1ec9 s\u1ed1 m\u1edbi h\u01a1n \u0111\u1ec3 thay th\u1ebf FMP, \u0111\u00f3 l\u00e0 <a href=\"https:\/\/kiencang.net\/largest-contentful-paint-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Largest Contentful Paint<\/a>).<\/p>\n\n\n\n<p>\u0110\u01b0\u1eddng d\u1eabn CSS ch\u00ednh \/ quan tr\u1ecdng (Critical Path CSS) l\u00e0 <strong>CSS ph\u1ea3i c\u00f3<\/strong> \u0111\u1ec3 xu\u1ea5t <a href=\"https:\/\/kiencang.net\/uu-tien-noi-dung-hien-thi\/\" target=\"_blank\" rel=\"noreferrer noopener\">n\u1ed9i dung n\u1eb1m tr\u00ean m\u00e0n h\u00ecnh \u0111\u1ea7u ti\u00ean<\/a> (above the fold) gi\u00fap tr\u00ecnh duy\u1ec7t nhanh ch\u00f3ng c\u00f3 kh\u1ea3 n\u0103ng &#8220;style&#8221; trang v\u00e0 xu\u1ea5t (hi\u1ec3n th\u1ecb) n\u00f3 ra, thay v\u00ec ph\u1ea3i t\u1ed1n th\u1eddi gian t\u1ea3i to\u00e0n b\u1ed9 file CSS (c\u1ed3ng k\u1ec1nh).<\/p>\n\n\n\n<p>Th\u00f4ng th\u01b0\u1eddng c\u00e1c \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng \u0111\u01b0\u1ee3c <a href=\"https:\/\/kiencang.net\/noi-tuyen-cac-css-nho\/\" target=\"_blank\" rel=\"noreferrer noopener\">inline (ch\u00e8n tr\u1ef1c ti\u1ebfp v\u00e0o trong th\u1ebb style n\u1eb1m \u1edf <em>&lt;head&gt;<\/em>, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;n\u1ed9i tuy\u1ebfn&#8221;)<\/a> v\u00e0 file CSS g\u1ed1c \u0111\u01b0\u1ee3c t\u1ea3i kh\u00f4ng \u0111\u1ed3ng b\u1ed9 (asynchronously) ho\u1eb7c \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o ph\u1ea7n ch\u00e2n trang (footer) \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c tr\u1ea3i nghi\u1ec7m t\u1ed1t nh\u1ea5t cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"t\u1ea1i-sao-d\u01b0\u1eddng-d\u1eabn-css-quan-tr\u1ecdng-l\u1ea1i-co-nhi\u1ec1u-y-nghia-d\u1ebfn-v\u1eady\"><span class=\"ez-toc-section\" id=\"3_Tai_sao_duong_dan_CSS_quan_trong_lai_co_nhieu_y_nghia_den_vay\"><\/span>#3. T\u1ea1i sao \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng l\u1ea1i c\u00f3 nhi\u1ec1u \u00fd ngh\u0129a \u0111\u1ebfn v\u1eady?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>B\u1ea1n ch\u1eafc h\u1eb3n \u0111\u00e3 nh\u00ecn th\u1ea5y c\u1ea3nh b\u00e1o t\u1eeb c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 <a href=\"https:\/\/developers.google.com\/speed\/pagespeed\/insights\/\" target=\"_blank\" rel=\"noreferrer noopener\">Google PageSpeed Insights<\/a> ho\u1eb7c <a href=\"https:\/\/gtmetrix.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">GTmetrix<\/a> n\u00f3i r\u1eb1ng &#8220;t\u1ed1i \u01b0u h\u00f3a ph\u00e2n ph\u1ed1i CSS&#8221; ho\u1eb7c &#8220;tr\u00ec ho\u00e3n t\u1ea3i CSS kh\u00f4ng s\u1eed d\u1ee5ng&#8221;.<\/p>\n\n\n\n<p>CSS quan tr\u1ecdng kh\u00f4ng t\u00e1c \u0111\u1ed9ng g\u00ec \u0111\u1ebfn th\u1eddi gian t\u1ea3i to\u00e0n b\u1ed9 website. N\u00f3 kh\u00f4ng l\u00e0m gi\u1ea3m, c\u0169ng ch\u1eb3ng l\u00e0m t\u0103ng th\u1eddi gian t\u1ea3i c\u1ee7a trang. Nh\u01b0ng n\u00f3 \u0111em \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng t\u1ed1t h\u01a1n. N\u00f3 gi\u00fap &#8220;xu\u1ea5t&#8221; hay &#8220;hi\u1ec3n th\u1ecb&#8221; trang web nhanh h\u01a1n.<\/p>\n\n\n\n<ul>\n<li>C\u1ea3i thi\u1ec7n FCP;<\/li>\n\n\n\n<li>C\u1ea3i thi\u1ec7n FMP;<\/li>\n\n\n\n<li><a href=\"https:\/\/kiencang.net\/css-khong-su-dung-wordpress\/\" target=\"_blank\" rel=\"noreferrer noopener\">Lo\u1ea1i b\u1ecf c\u00e1c CSS kh\u00f4ng s\u1eed d\u1ee5ng<\/a> (kh\u00f4ng lo\u1ea1i b\u1ecf v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, \u0111\u00fang h\u01a1n l\u00e0 n\u00f3 \u01b0u ti\u00ean c\u00e1c CSS &#8220;c\u00f3 \u00edch&#8221;).<\/li>\n<\/ul>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 hai h\u00ecnh ch\u1ee5p m\u00e0n h\u00ecnh blog c\u1ee7a t\u00f4i khi c\u00f3 v\u00e0 kh\u00f4ng c\u00f3 critical CSS.<\/p>\n\n\n<div class=\"wp-block-image wp-image-13821 size-full\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2019\/12\/khong-co-css-quan-trong.png\" alt=\"kh\u00f4ng c\u00f3 CSS quan tr\u1ecdng\" class=\"wp-image-13821\"\/><figcaption class=\"wp-element-caption\">Kh\u00f4ng c\u00f3 critical CSS<\/figcaption><\/figure><\/div>\n\n<div class=\"wp-block-image wp-image-13822 size-full\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2019\/12\/co-css-quan-trong.png\" alt=\"C\u00f3 CSS quan tr\u1ecdng\" class=\"wp-image-13822\"\/><figcaption class=\"wp-element-caption\">C\u00f3 critical CSS<\/figcaption><\/figure><\/div>\n\n\n<p>Nh\u01b0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y, trong tr\u01b0\u1eddng h\u1ee3p &#8220;kh\u00f4ng c\u00f3 \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng&#8221;, n\u00f3 c\u1ea7n \u0111\u1ebfn g\u1ea7n 5 gi\u00e2y \u0111\u1ec3 hi\u1ec3n th\u1ecb n\u1ed9i dung n\u00e0o \u0111\u00f3 c\u00f3 \u00edch cho ng\u01b0\u1eddi d\u00f9ng tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng. <\/p>\n\n\n\n<p>Tr\u00ecnh duy\u1ec7t ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u HTTP gia t\u0103ng cho file CSS, t\u1ea3i n\u00f3, ph\u00e2n t\u00edch n\u00f3 theo th\u1ee9 t\u1ef1 \u0111\u1ec3 b\u1eaft \u0111\u1ea7u hi\u1ec3n th\u1ecb. Nh\u01b0ng khi s\u1eed d\u1ee5ng CSS quan tr\u1ecdng, t\u1ea5t c\u1ea3 c\u00e1c CSS c\u1ea7n thi\u1ebft \u0111\u01b0\u1ee3c inline (n\u1ed9i tuy\u1ebfn) v\u00e0 tr\u00ecnh duy\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng xu\u1ea5t n\u00f3 ngay l\u1eadp t\u1ee9c sau khi t\u1ea3i file HTML, ch\u1ec9 trong kho\u1ea3ng m\u1ed9t gi\u00e2y ho\u1eb7c \u00edt h\u01a1n.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lam-th\u1ebf-nao-d\u1ec3-t\u1ea1o-ra-d\u01b0\u1ee3c-css-quan-tr\u1ecdng-trong-wordpress\"><span class=\"ez-toc-section\" id=\"4_Lam_the_nao_de_tao_ra_duoc_CSS_quan_trong_trong_WordPress\"><\/span>#4. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c CSS quan tr\u1ecdng trong WordPress?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00f3 m\u1ed9t s\u1ed1 c\u00e1ch gi\u00fap t\u1ea1o ra \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng trong WordPress.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"a-s\u1eed-d\u1ee5ng-plugin-cache\">a. S\u1eed d\u1ee5ng plugin cache<\/h3>\n\n\n\n<p><a href=\"https:\/\/wp-rocket.me\/\" target=\"_blank\" rel=\"noreferrer noopener\">WP-Rocket<\/a> l\u00e0 plugin tr\u1ea3 ph\u00ed l\u00e0m vi\u1ec7c n\u00e0y th\u1ef1c s\u1ef1 t\u1ed1t (ngo\u00e0i ra c\u00f2n c\u00f3 <a href=\"https:\/\/kiencang.net\/huong-dan-plugin-flying-press\/\" target=\"_blank\" rel=\"noreferrer noopener\">FlyingPress<\/a>, <a href=\"https:\/\/kiencang.net\/cach-dung-plugin-swift-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\">Swift Performance<\/a> v\u00e0 <a href=\"https:\/\/kiencang.net\/hd-plugin-litespeed-cache-p1\/\" target=\"_blank\" rel=\"noreferrer noopener\">LiteSpeed cache<\/a>).<\/p>\n\n\n\n<p>M\u1ed9t trong c\u00e1c l\u00fd do t\u00f4i s\u1eed d\u1ee5ng WP-Rocket trong m\u1ecdi trang l\u00e0 b\u1edfi t\u00ednh n\u0103ng t\u1ea1o \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng c\u1ee7a n\u00f3. Ch\u00fang t\u1ea1o t\u1eebng CSS quan tr\u1ecdng ri\u00eang cho trang ch\u1ee7, trang post, trang th\u01b0 m\u1ee5c, trang s\u1ea3n ph\u1ea9m, v\u00e2n v\u00e2n v\u00e0 n\u1ed9i tuy\u1ebfn (inline) n\u00f3. <\/p>\n\n\n\n<p>WP-Rocket <em>x\u00e2y d\u1ef1ng l\u1ea1i<\/em> c\u00e1c CSS quan tr\u1ecdng n\u1ebfu c\u00f3 \u0111i\u1ec1u g\u00ec \u0111\u00f3 thay \u0111\u1ed5i trong giao di\u1ec7n ho\u1eb7c \u0111i\u1ec1u g\u00ec \u0111\u1ea5y \u0111\u01b0\u1ee3c tinh ch\u1ec9nh.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2019\/12\/wp-rocket-tao-css-quan-trong.png\" alt=\"WP-Rocket t\u1ea1o CSS quan tr\u1ecdng\" class=\"wp-image-13824\"\/><\/figure><\/div>\n\n\n<p>M\u1ecdi th\u1ee9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n ch\u1ec9 v\u1edbi m\u1ed9t click.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2019\/12\/toi-uu-hoa-phan-phoi-css.png\" alt=\"T\u1ed1i \u01b0u h\u00f3a ph\u00e2n ph\u1ed1i CSS\" class=\"wp-image-13825\"\/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"b-cac-plugin-cache-khac-co-kh\u1ea3-nang-t\u1ea1o-ra-d\u01b0\u1eddng-d\u1eabn-css-quan-tr\u1ecdng\">b. C\u00e1c plugin cache kh\u00e1c c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng<\/h3>\n\n\n\n<p>Swift Performance v\u00e0 LiteSpeed (y\u00eau c\u1ea7u m\u00e1y ch\u1ee7 LiteSpeed\/OpenLiteSpeed) l\u00e0 nh\u1eefng plugin t\u01b0\u01a1ng t\u1ef1 c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra CSS quan tr\u1ecdng. <\/p>\n\n\n\n<p>T\u1ea5t c\u1ea3 nh\u1eefng plugin n\u00e0y \u0111\u1ec1u d\u1ef1a tr\u00ean cloud v\u00e0 to\u00e0n b\u1ed9 cache \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 c\u1ee7a h\u1ecd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c-s\u1eed-d\u1ee5ng-autoptimize-\u1ee9ng-d\u1ee5ng-t\u1ea1o-css-quan-tr\u1ecdng-mi\u1ec5n-phi\">c. S\u1eed d\u1ee5ng Autoptimize + \u1ee8ng d\u1ee5ng t\u1ea1o CSS quan tr\u1ecdng mi\u1ec5n ph\u00ed<\/h3>\n\n\n\n<p>C\u00f3 nh\u1eefng \u1ee9ng d\u1ee5ng tr\u1ef1c tuy\u1ebfn c\u1ee7a b\u00ean th\u1ee9 3 s\u1ebd cung c\u1ea5p CSS quan tr\u1ecdng b\u1eb1ng c\u00e1ch nh\u1eadp URL c\u1ee7a trang. <a href=\"https:\/\/pegasaas.com\/critical-path-css-generator\/\" target=\"_blank\" rel=\"noreferrer noopener\">Pegasaas<\/a> l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 mi\u1ec5n ph\u00ed nh\u01b0 v\u1eady, c\u00f4ng n\u0103ng c\u1ee7a n\u00f3 kh\u00e1 \u1ea5n t\u01b0\u1ee3ng.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch l\u00e0m:<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:&nbsp;<\/strong> Truy c\u1eadp v\u00e0o trang <a href=\"https:\/\/pegasaas.com\/critical-path-css-generator\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/pegasaas.com\/critical-path-css-generator\/<\/a> v\u00e0 nh\u1eadp URL c\u1ee7a b\u1ea1n v\u00e0o (b\u1ea1n n\u00ean ch\u1ecdn b\u00e0i c\u00f3 \u0111\u1ecbnh d\u1ea1ng ph\u1ed5 bi\u1ebfn tr\u00ean trang, n\u1ebfu n\u00f3 l\u00e0 b\u00e0i c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn th\u00ec c\u00e0ng t\u1ed1t). Copy n\u1ed9i dung &#8220;\u0110\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng \/ Critical Path CSS&#8221; \u0111\u01b0\u1ee3c t\u1ea1o ra.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2<\/strong>: Trong ph\u1ea7n <a href=\"https:\/\/kiencang.net\/plugin-autoptimize\/\" target=\"_blank\" rel=\"noreferrer noopener\">thi\u1ebft l\u1eadp Autoptimize<\/a> (b\u1eadt t\u00f9y ch\u1ecdn c\u00e0i \u0111\u1eb7t n\u00e2ng cao), d\u01b0\u1edbi ph\u1ea7n &#8220;CSS Options \/ T\u00f9y ch\u1ecdn CSS&#8221; ki\u1ec3m tra &#8220;Inline and defer CSS \/ N\u1ed9i tuy\u1ebfn v\u00e0 tr\u00ec ho\u00e3n CSS&#8221; v\u00e0 paste \u0111o\u1ea1n CSS v\u1eeba copy v\u00e0o.<\/p>\n\n\n\n<p>\u01afu \u0111i\u1ec3m:<\/p>\n\n\n\n<ul>\n<li>Mi\u1ec5n ph\u00ed;<\/li>\n<\/ul>\n\n\n\n<p>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/p>\n\n\n\n<ul>\n<li>Kh\u00f4ng t\u1ea1o ra c\u00e1c CSS ri\u00eang r\u1ebd cho c\u00e1c ki\u1ec3u trang kh\u00e1c nhau (v\u00ed d\u1ee5: trang ch\u1ee7, trang b\u00e0i \u0111\u0103ng \/ post, trang th\u01b0 m\u1ee5c, trang s\u1ea3n ph\u1ea9m, v\u00e2n v\u00e2n);<\/li>\n\n\n\n<li>Kh\u00f4ng t\u1ef1 \u0111\u1ed9ng x\u00e2y d\u1ef1ng l\u1ea1i CSS quan tr\u1ecdng khi giao di\u1ec7n thay \u0111\u1ed5i ho\u1eb7c c\u00f3 tinh ch\u1ec9nh n\u00e0o \u0111\u00f3 x\u1ea3y ra, n\u00f3i c\u00e1ch kh\u00e1c khi c\u00f3 c\u00e1c thay \u0111\u1ed5i l\u1edbn b\u1ea1n ph\u1ea3i c\u1eadp nh\u1eadt th\u1ee7 c\u00f4ng, nhi\u1ec1u khi ch\u00fang ta l\u01b0\u1eddi ho\u1eb7c qu\u00ean m\u1ea5t kh\u00f4ng l\u00e0m;<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"t\u1ea1i-sao-b\u1ea3n-than-wordpress-khong-th\u1ec3-t\u1ea1o-ra-d\u01b0\u1ee3c-critical-css\"><span class=\"ez-toc-section\" id=\"5_Tai_sao_ban_than_WordPress_khong_the_tao_ra_duoc_critical_CSS\"><\/span>#5. T\u1ea1i sao b\u1ea3n th\u00e2n WordPress kh\u00f4ng th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c critical CSS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00f3 th\u1ec3 b\u1ea1n \u0111\u00e3 \u0111\u1ec3 \u00fd th\u1ea5y r\u1eb1ng t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng li\u00ean quan \u0111\u1ebfn c\u00e1c d\u1ecbch v\u1ee5 b\u00ean ngo\u00e0i. V\u1eady t\u1ea1i sao b\u1ea3n th\u00e2n WordPress kh\u00f4ng th\u1ec3 t\u1ef1 t\u1ea1o ra \u0111\u01b0\u1ee3c? (v\u00ec r\u00f5 r\u00e0ng l\u00e0 t\u00ednh n\u0103ng n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng).<\/p>\n\n\n\n<p>T\u1ea1o ra \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng (Generating Critical CSS) \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi c\u00e1c d\u1ef1 \u00e1n ngu\u1ed3n m\u1edf nh\u01b0 Critical (t\u1eeb Google) ho\u1eb7c <a href=\"https:\/\/criticalcss.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">CriticalCSS<\/a> ho\u1eb7c penhouse. T\u1ea5t c\u1ea3 c\u00e1c d\u1ef1 \u00e1n n\u00e0y d\u1ef1a tr\u00ean NodeJS ch\u1ee9 kh\u00f4ng ph\u1ea3i PHP. V\u00ec th\u1ebf b\u1ea1n s\u1ebd c\u1ea7n c\u00e0i \u0111\u1eb7t NodeJS tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n. H\u1ea7u h\u1ebft c\u00e1c c\u00f4ng ty hosting s\u1ebd kh\u00f4ng cho ph\u00e9p \u0111i\u1ec1u n\u00e0y v\u00ec m\u1ed9t s\u1ed1 l\u00fd do.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"k\u1ebft-lu\u1eadn\"><span class=\"ez-toc-section\" id=\"6_Ket_luan\"><\/span>#6. K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>WP-Rocket l\u00e0 ng\u01b0\u1eddi chi\u1ebfn th\u1eafng trong v\u1ea5n \u0111\u1ec1 n\u00e0y m\u00e0 kh\u00f4ng c\u00f3 g\u00ec ph\u1ea3i b\u00e0n c\u00e3i. M\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u gi\u1ea3i ph\u00e1p kh\u00e1c, kh\u00f4ng c\u00f3 gi\u1ea3i ph\u00e1p n\u00e0o c\u00f3 th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1eddng d\u1eabn CSS quan tr\u1ecdng cho t\u1eebng ki\u1ec3u trang kh\u00e1c nhau m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng nh\u01b0 c\u00e1ch m\u00e0 WP-Rocket \u0111ang l\u00e0m.<\/p>\n\n\n\n<p>[C\u1eadp nh\u1eadt]: hi\u1ec7n t\u1ea1i c\u00f3 nhi\u1ec1u plugin c\u00f3 th\u1ec3 c\u1ea1nh tranh t\u1ed1t v\u1edbi WP-Rocket trong vi\u1ec7c t\u1ea1o ra critical CSS, ch\u1eb3ng h\u1ea1n nh\u01b0 <a href=\"https:\/\/kiencang.net\/hd-plugin-litespeed-cache-p1\/\" target=\"_blank\" rel=\"noreferrer noopener\">LiteSpeed cache<\/a> hay <a href=\"https:\/\/kiencang.net\/huong-dan-plugin-flying-press\/\" target=\"_blank\" rel=\"noreferrer noopener\">FlyingPress<\/a> (c\u1ee7a ch\u00ednh t\u00e1c gi\u1ea3 b\u00e0i g\u1ed1c ti\u1ebfng Anh n\u00e0y- Gijo Varghese).<\/p>\n\n\n\n<p><em>(\u0110\u01b0\u1ee3c d\u1ecbch t\u1eeb b\u00e0i vi\u1ebft: <a href=\"https:\/\/wpspeedmatters.com\/critical-path-css-in-wordpress\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">How to Generate Critical Path CSS in WordPress<\/a>, t\u00e1c gi\u1ea3: Gijo Varghese, website: WPSpeedMatters)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1ch CSS (th\u00f4ng th\u01b0\u1eddng) s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong WordPress. M\u1ecdi giao di\u1ec7n (theme) WordPress \u0111\u1ec1u bao g\u1ed3m m\u1ed9t file style.css bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c \u0111o\u1ea1n m\u00e3 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o style cho &hellip;<\/p>\n","protected":false},"author":1,"featured_media":21359,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[262],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Critical CSS l\u00e0 g\u00ec? C\u00e1ch tr\u00edch xu\u1ea5t critical CSS trong WordPress? &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/critical-css-wordpress\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Critical CSS l\u00e0 g\u00ec? C\u00e1ch tr\u00edch xu\u1ea5t critical CSS trong WordPress? &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1ch CSS (th\u00f4ng th\u01b0\u1eddng) s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong WordPress. M\u1ecdi giao di\u1ec7n (theme) WordPress \u0111\u1ec1u bao g\u1ed3m m\u1ed9t file style.css bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c \u0111o\u1ea1n m\u00e3 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o style cho &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kiencang.net\/critical-css-wordpress\/\" \/>\n<meta property=\"og:site_name\" content=\"Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/anhducnguyen87\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-12-07T09:16:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-23T12:40:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/12\/critical-css-uu-tien-tai.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"425\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Critical CSS l\u00e0 g\u00ec? C\u00e1ch tr\u00edch xu\u1ea5t critical CSS trong WordPress? &#8226; Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/critical-css-wordpress\/","og_locale":"vi_VN","og_type":"article","og_title":"Critical CSS l\u00e0 g\u00ec? C\u00e1ch tr\u00edch xu\u1ea5t critical CSS trong WordPress? &#8226; Ki\u1ebfn c\u00e0ng","og_description":"#1. Hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a CSS trong WordPress Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1ch CSS (th\u00f4ng th\u01b0\u1eddng) s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong WordPress. 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