{"id":476181,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:11","modified_gmt":"2023-09-05T11:12:11","slug":"cascading-stylesheets-css","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/cascading-stylesheets-css\/","title":{"rendered":"B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS)"},"content":{"rendered":"<p>Cascading Style Sheets, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 CSS, l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e1t tri\u1ec3n web \u0111\u1ec3 ki\u1ec3m so\u00e1t c\u00e1ch tr\u00ecnh b\u00e0y v\u00e0 b\u1ed1 c\u1ee5c c\u1ee7a t\u00e0i li\u1ec7u HTML. N\u00f3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1ch hi\u1ec3n th\u1ecb c\u00e1c th\u00e0nh ph\u1ea7n trong trang web, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n web t\u00e1ch n\u1ed9i dung c\u1ee7a trang web kh\u1ecfi thi\u1ebft k\u1ebf tr\u1ef1c quan c\u1ee7a n\u00f3. B\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u00eau chu\u1ea9n h\u00f3a \u0111\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ki\u1ec3u cho c\u00e1c trang web, CSS \u0111\u00e3 g\u00f3p ph\u1ea7n r\u1ea5t l\u1edbn v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a thi\u1ebft k\u1ebf web hi\u1ec7n \u0111\u1ea1i v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a Cascading Stylesheets (CSS) v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3.<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a Cascading Style Sheets c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a World Wide Web. N\u0103m 1994, H\u00e5kon Wium Lie v\u00e0 Bert Bos, c\u1ea3 hai \u0111\u1ec1u l\u00e0 th\u00e0nh vi\u00ean c\u1ee7a World Wide Web Consortium (W3C), \u0111\u00e3 \u0111\u1ec1 xu\u1ea5t m\u1ed9t ng\u00f4n ng\u1eef bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u c\u00f3 t\u00ean CSS. M\u1ee5c \u0111\u00edch c\u1ee7a h\u1ecd l\u00e0 gi\u1edbi thi\u1ec7u m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m so\u00e1t vi\u1ec7c tr\u00ecnh b\u00e0y c\u00e1c t\u00e0i li\u1ec7u web m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp v\u1edbi n\u1ed9i dung v\u00e0 c\u1ea5u tr\u00fac.<\/p>\n<p>S\u1ef1 \u0111\u1ec1 c\u1eadp ch\u00ednh th\u1ee9c \u0111\u1ea7u ti\u00ean v\u1ec1 CSS xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi vi\u1ec7c ph\u00e1t h\u00e0nh CSS c\u1ea5p 1 (CSS1) v\u00e0o n\u0103m 1996 nh\u01b0 m\u1ed9t ph\u1ea7n trong khuy\u1ebfn ngh\u1ecb c\u1ee7a W3C. K\u1ec3 t\u1eeb \u0111\u00f3, CSS \u0111\u00e3 tr\u1ea3i qua nhi\u1ec1u l\u1ea7n s\u1eeda \u0111\u1ed5i, v\u1edbi CSS c\u1ea5p 2 (CSS2) v\u00e0o n\u0103m 1998 v\u00e0 CSS c\u1ea5p 3 (CSS3) v\u00e0o n\u0103m 1999, v\u00e0 c\u00e1c m\u00f4-\u0111un sau n\u00e0y \u0111\u01b0\u1ee3c b\u1ed5 sung theo th\u1eddi gian. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a CSS l\u00e0 m\u1ed9t n\u1ed7 l\u1ef1c kh\u00f4ng ng\u1eebng nh\u1eb1m n\u00e2ng cao kh\u1ea3 n\u0103ng c\u1ee7a n\u00f3 v\u00e0 cung c\u1ea5p c\u00e1c t\u00f9y ch\u1ecdn t\u1ea1o ki\u1ec3u ph\u1ee9c t\u1ea1p h\u01a1n cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n web.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS). M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp ch\u1ed3ng (CSS).<\/h2>\n<p>CSS ho\u1ea1t \u0111\u1ed9ng theo nguy\u00ean t\u1eafc x\u1ebfp t\u1ea7ng, trong \u0111\u00f3 nhi\u1ec1u bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00f9ng m\u1ed9t t\u00e0i li\u1ec7u HTML v\u00e0 c\u00e1c ki\u1ec3u \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p d\u1ef1a tr\u00ean t\u00ednh \u0111\u1eb7c hi\u1ec7u v\u00e0 th\u1ee9 t\u1ef1 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn m\u00f4-\u0111un v\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u1ec3 t\u1ea1o ki\u1ec3u cho c\u00e1c trang web. B\u1eb1ng c\u00e1ch t\u00e1ch l\u1edbp tr\u00ecnh b\u00e0y kh\u1ecfi n\u1ed9i dung, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n web c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng c\u1eadp nh\u1eadt v\u00e0 s\u1eeda \u0111\u1ed5i giao di\u1ec7n c\u1ee7a trang web m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i c\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a n\u00f3.<\/p>\n<p>CSS \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e2n t\u00e1ch n\u00e0y b\u1eb1ng c\u00e1ch nh\u1eafm m\u1ee5c ti\u00eau c\u00e1c ph\u1ea7n t\u1eed ho\u1eb7c nh\u00f3m ph\u1ea7n t\u1eed HTML c\u1ee5 th\u1ec3 th\u00f4ng qua b\u1ed9 ch\u1ecdn. M\u1ed7i b\u1ed9 ch\u1ecdn \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 gi\u00e1 tr\u1ecb x\u00e1c \u0111\u1ecbnh c\u00e1ch t\u1ea1o ki\u1ec3u cho c\u00e1c ph\u1ea7n t\u1eed \u0111\u01b0\u1ee3c nh\u1eafm m\u1ee5c ti\u00eau. C\u00e1c thu\u1ed9c t\u00ednh ki\u1ec3m so\u00e1t c\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c nhau nh\u01b0 m\u00e0u s\u1eafc, ph\u00f4ng ch\u1eef, l\u1ec1, ph\u1ea7n \u0111\u1ec7m, v\u1ecb tr\u00ed v\u00e0 h\u00ecnh \u0111\u1ed9ng.<\/p>\n<p>M\u1ed9t trong nh\u1eefng \u01b0u \u0111i\u1ec3m \u0111\u00e1ng k\u1ec3 c\u1ee7a CSS l\u00e0 n\u00f3 cho ph\u00e9p t\u1ea1o ra c\u00e1c thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng, cho ph\u00e9p c\u00e1c trang web th\u00edch \u1ee9ng v\u00e0 hi\u1ec3n th\u1ecb t\u1ed1i \u01b0u tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb v\u00e0 k\u00edch th\u01b0\u1edbc m\u00e0n h\u00ecnh kh\u00e1c nhau. Truy v\u1ea5n ph\u01b0\u01a1ng ti\u1ec7n, \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong CSS3, cho ph\u00e9p nh\u00e0 ph\u00e1t tri\u1ec3n \u00e1p d\u1ee5ng c\u00e1c ki\u1ec3u kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0 chi\u1ec1u r\u1ed9ng, chi\u1ec1u cao v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i m\u00e0n h\u00ecnh, n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng tr\u00ean \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh, m\u00e1y t\u00ednh b\u1ea3ng v\u00e0 m\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Cascading Stylesheets (CSS). C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS).<\/h2>\n<p>Trong n\u1ed9i b\u1ed9, CSS bao g\u1ed3m c\u00e1c b\u1ed9 quy t\u1eafc x\u00e1c \u0111\u1ecbnh c\u00e1ch t\u1ea1o ki\u1ec3u cho c\u00e1c ph\u1ea7n t\u1eed HTML. M\u1ed9t b\u1ed9 quy t\u1eafc bao g\u1ed3m hai ph\u1ea7n: b\u1ed9 ch\u1ecdn v\u00e0 kh\u1ed1i khai b\u00e1o. B\u1ed9 ch\u1ecdn cho bi\u1ebft ki\u1ec3u n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho ph\u1ea7n t\u1eed HTML n\u00e0o v\u00e0 kh\u1ed1i khai b\u00e1o ch\u1ee9a danh s\u00e1ch c\u00e1c c\u1eb7p thu\u1ed9c t\u00ednh-gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c \u0111\u1eb7t trong d\u1ea5u ngo\u1eb7c nh\u1ecdn.<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>css<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>Sao ch\u00e9p m\u00e3<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-css\" data-no-translation=\"\">selector {\n  property1: value1;\n  property2: value2;\n  ...\n  propertyN: valueN;\n}\n<\/code><\/div><\/div><\/pre>\n<p>Khi m\u1ed9t trang web \u0111\u01b0\u1ee3c t\u1ea3i, tr\u00ecnh duy\u1ec7t s\u1ebd ph\u00e2n t\u00edch c\u00e1c quy t\u1eafc CSS v\u00e0 \u00e1p d\u1ee5ng c\u00e1c ki\u1ec3u \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh cho c\u00e1c ph\u1ea7n t\u1eed HTML t\u01b0\u01a1ng \u1ee9ng. N\u1ebfu nhi\u1ec1u quy t\u1eafc nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u00f9ng m\u1ed9t ph\u1ea7n t\u1eed, tr\u00ecnh duy\u1ec7t s\u1ebd tu\u00e2n theo nguy\u00ean t\u1eafc x\u1ebfp t\u1ea7ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ki\u1ec3u cu\u1ed1i c\u00f9ng b\u1eb1ng c\u00e1ch xem x\u00e9t t\u00ednh \u0111\u1eb7c hi\u1ec7u, t\u00ednh k\u1ebf th\u1eeba v\u00e0 th\u1ee9 t\u1ef1 \u1ee9ng d\u1ee5ng.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS).<\/h2>\n<p>CSS cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c t\u00ednh n\u0103ng c\u1ea7n thi\u1ebft gi\u00fap n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 ph\u00e1t tri\u1ec3n web:<\/p>\n<ol>\n<li>\n<p><strong>T\u00ednh ch\u1ea5t x\u1ebfp t\u1ea7ng:<\/strong> C\u00e1c quy t\u1eafc CSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p, ghi \u0111\u00e8 v\u00e0 k\u1ebf th\u1eeba, mang l\u1ea1i s\u1ef1 linh ho\u1ea1t v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec trong thi\u1ebft k\u1ebf web.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00ednh m\u00f4 \u0111un:<\/strong> B\u1eb1ng c\u00e1ch t\u00e1ch phong c\u00e1ch kh\u1ecfi n\u1ed9i dung, CSS th\u00fac \u0111\u1ea9y c\u00e1ch ti\u1ebfp c\u1eadn m\u00f4-\u0111un \u0111\u1ec3 ph\u00e1t tri\u1ec3n web, gi\u00fap qu\u1ea3n l\u00fd v\u00e0 c\u1eadp nh\u1eadt ki\u1ec3u d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>Thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng:<\/strong> Truy v\u1ea5n ph\u01b0\u01a1ng ti\u1ec7n cho ph\u00e9p thi\u1ebft k\u1ebf web \u0111\u00e1p \u1ee9ng, cho ph\u00e9p c\u00e1c trang web th\u00edch \u1ee9ng v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc m\u00e0n h\u00ecnh v\u00e0 thi\u1ebft b\u1ecb kh\u00e1c nhau.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch tr\u00ean nhi\u1ec1u tr\u00ecnh duy\u1ec7t:<\/strong> CSS gi\u00fap \u0111\u1ea3m b\u1ea3o tr\u00ecnh b\u00e0y nh\u1ea5t qu\u00e1n tr\u00ean nhi\u1ec1u tr\u00ecnh duy\u1ec7t web kh\u00e1c nhau.<\/p>\n<\/li>\n<li>\n<p><strong>Ho\u1ea1t \u1ea3nh v\u00e0 chuy\u1ec3n ti\u1ebfp:<\/strong> CSS3 \u0111\u00e3 gi\u1edbi thi\u1ec7u c\u00e1c thu\u1ed9c t\u00ednh ho\u1ea1t \u1ea3nh v\u00e0 chuy\u1ec3n ti\u1ebfp, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng m\u01b0\u1ee3t m\u00e0 v\u00e0 c\u00f3 t\u00ednh t\u01b0\u01a1ng t\u00e1c.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ed1 c\u1ee5c Flexbox v\u00e0 l\u01b0\u1edbi:<\/strong> CSS cung c\u1ea5p c\u00e1c h\u1ec7 th\u1ed1ng b\u1ed1 c\u1ee5c m\u1ea1nh m\u1ebd nh\u01b0 Flexbox v\u00e0 Grid, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o b\u1ed1 c\u1ee5c trang ph\u1ee9c t\u1ea1p v\u00e0 linh ho\u1ea1t.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ed9 ch\u1ecdn:<\/strong> CSS cung c\u1ea5p nhi\u1ec1u lo\u1ea1i b\u1ed9 ch\u1ecdn, bao g\u1ed3m l\u1edbp, ID, ph\u1ea7n t\u1eed, thu\u1ed9c t\u00ednh v\u00e0 b\u1ed9 ch\u1ecdn gi\u1ea3 l\u1edbp, cho ph\u00e9p nh\u1eafm m\u1ee5c ti\u00eau ch\u00ednh x\u00e1c c\u00e1c ph\u1ea7n t\u1eed.<\/p>\n<\/li>\n<li>\n<p><strong>Bi\u1ebfn:<\/strong> C\u00e1c thu\u1ed9c t\u00ednh (bi\u1ebfn) t\u00f9y ch\u1ec9nh CSS cho ph\u00e9p t\u1ea1o c\u00e1c ki\u1ec3u \u0111\u1ed9ng h\u01a1n v\u00e0 c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n<\/li>\n<\/ol>\n<h2>Vi\u1ebft nh\u1eefng lo\u1ea1i B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp ch\u1ed3ng (CSS) t\u1ed3n t\u1ea1i. S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft.<\/h2>\n<p>CSS \u0111\u00e3 ph\u00e1t tri\u1ec3n theo th\u1eddi gian v\u00e0 nhi\u1ec1u m\u00f4-\u0111un v\u00e0 \u0111\u1eb7c t\u1ea3 CSS kh\u00e1c nhau \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i CSS quan tr\u1ecdng:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i CSS<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CSS1<\/td>\n<td>Phi\u00ean b\u1ea3n \u0111\u1ea7u ti\u00ean c\u1ee7a CSS, gi\u1edbi thi\u1ec7u ki\u1ec3u d\u00e1ng c\u01a1 b\u1ea3n.<\/td>\n<\/tr>\n<tr>\n<td>CSS2<\/td>\n<td>CSS1 m\u1edf r\u1ed9ng v\u1edbi c\u00e1c t\u00ednh n\u0103ng m\u1edbi v\u00e0 h\u1ed7 tr\u1ee3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/td>\n<\/tr>\n<tr>\n<td>CSS3<\/td>\n<td>Phi\u00ean b\u1ea3n ti\u1ebfp theo v\u1edbi nhi\u1ec1u m\u00f4-\u0111un v\u00e0 c\u1ea3i ti\u1ebfn kh\u00e1c nhau.<\/td>\n<\/tr>\n<tr>\n<td>L\u01b0\u1edbi CSS<\/td>\n<td>M\u1ed9t h\u1ec7 th\u1ed1ng b\u1ed1 tr\u00ed l\u01b0\u1edbi hai chi\u1ec1u m\u1ea1nh m\u1ebd.<\/td>\n<\/tr>\n<tr>\n<td>CSS Flexbox<\/td>\n<td>M\u00f4 h\u00ecnh b\u1ed1 tr\u00ed m\u1ed9t chi\u1ec1u cho c\u00e1c th\u00f9ng ch\u1ee9a linh ho\u1ea1t.<\/td>\n<\/tr>\n<tr>\n<td>Chuy\u1ec3n \u0111\u1ed5i CSS<\/td>\n<td>Ho\u1ea1t \u1ea3nh x\u1ea3y ra trong qu\u00e1 tr\u00ecnh thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/td>\n<\/tr>\n<tr>\n<td>Ho\u1ea1t \u1ea3nh CSS<\/td>\n<td>Ho\u1ea1t \u1ea3nh d\u1ef1a tr\u00ean khung h\u00ecnh ch\u00ednh cho c\u00e1c hi\u1ec7u \u1ee9ng ph\u1ee9c t\u1ea1p h\u01a1n.<\/td>\n<\/tr>\n<tr>\n<td>Bi\u1ebfn CSS<\/td>\n<td>Thu\u1ed9c t\u00ednh t\u00f9y ch\u1ec9nh cho phong c\u00e1ch n\u0103ng \u0111\u1ed9ng v\u00e0 c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng.<\/td>\n<\/tr>\n<tr>\n<td>Truy v\u1ea5n ph\u01b0\u01a1ng ti\u1ec7n CSS<\/td>\n<td>Ki\u1ec3u c\u00f3 \u0111i\u1ec1u ki\u1ec7n d\u1ef1a tr\u00ean \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a thi\u1ebft b\u1ecb.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng Cascading Stylesheets (CSS), c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng.<\/h2>\n<p>CSS l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n web v\u00e0 c\u00f3 nhi\u1ec1u c\u00e1ch kh\u00e1c nhau \u0111\u1ec3 s\u1eed d\u1ee5ng n\u00f3:<\/p>\n<ol>\n<li>\n<p><strong>CSS b\u00ean ngo\u00e0i:<\/strong> Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t l\u00e0 t\u1ea1o m\u1ed9t t\u1ec7p CSS ri\u00eang v\u00e0 li\u00ean k\u1ebft n\u00f3 v\u1edbi t\u00e0i li\u1ec7u HTML b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <code data-no-translation=\"\">&lt;link&gt;<\/code> y\u1ebfu t\u1ed1. \u0110i\u1ec1u n\u00e0y th\u00fac \u0111\u1ea9y t\u00ednh m\u00f4-\u0111un v\u00e0 kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n<\/li>\n<li>\n<p><strong>CSS n\u1ed9i b\u1ed9:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 nh\u00fang CSS tr\u1ef1c ti\u1ebfp v\u00e0o t\u00e0i li\u1ec7u HTML b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <code data-no-translation=\"\">&lt;style&gt;<\/code> ph\u1ea7n t\u1eed b\u00ean trong <code data-no-translation=\"\">&lt;head&gt;<\/code> ph\u1ea7n. M\u1eb7c d\u00f9 ph\u01b0\u01a1ng ph\u00e1p n\u00e0y thu\u1eadn ti\u1ec7n cho vi\u1ec7c t\u1ea1o ki\u1ec3u \u1edf quy m\u00f4 nh\u1ecf nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng th\u1ec3 duy tr\u00ec \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n l\u1edbn h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>CSS n\u1ed9i tuy\u1ebfn:<\/strong> \u00c1p d\u1ee5ng ki\u1ec3u tr\u1ef1c ti\u1ebfp cho c\u00e1c ph\u1ea7n t\u1eed HTML b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <code data-no-translation=\"\">style<\/code> thu\u1ed9c t\u00ednh n\u00e0y l\u00e0 c\u00f3 th\u1ec3 nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch do kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec th\u1ea5p v\u00e0 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i gi\u1ea3m.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ed9 ti\u1ec1n x\u1eed l\u00fd CSS:<\/strong> C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ti\u1ec1n x\u1eed l\u00fd CSS nh\u01b0 Sass, Less ho\u1eb7c Stylus \u0111\u1ec3 th\u00eam c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao nh\u01b0 bi\u1ebfn, l\u1ed3ng v\u00e0 h\u00e0m, n\u00e2ng cao kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 t\u1ed5 ch\u1ee9c c\u00e1c bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u.<\/p>\n<\/li>\n<li>\n<p><strong>Khung CSS:<\/strong> Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c khung CSS nh\u01b0 Bootstrap ho\u1eb7c Foundation c\u00f3 th\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n b\u1eb1ng c\u00e1ch cung c\u1ea5p c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 ki\u1ec3u d\u00e1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf s\u1eb5n.<\/p>\n<\/li>\n<\/ol>\n<p>C\u00e1c v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 ph\u00e1t sinh khi s\u1eed d\u1ee5ng CSS bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p><strong>Xung \u0111\u1ed9t v\u1ec1 t\u00ednh \u0111\u1eb7c hi\u1ec7u:<\/strong> Khi nhi\u1ec1u quy t\u1eafc CSS nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u00f9ng m\u1ed9t ph\u1ea7n t\u1eed c\u00f3 \u0111\u1ed9 \u0111\u1eb7c hi\u1ec7u kh\u00e1c nhau, xung \u0111\u1ed9t c\u00f3 th\u1ec3 ph\u00e1t sinh v\u00e0 c\u00e1c ki\u1ec3u d\u1ef1 ki\u1ebfn c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. Qu\u1ea3n l\u00fd b\u1ed9 ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng c\u00e1c l\u1edbp \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 gi\u00fap tr\u00e1nh nh\u1eefng v\u1ea5n \u0111\u1ec1 nh\u01b0 v\u1eady.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a tr\u00ecnh duy\u1ec7t web:<\/strong> C\u00e1c tr\u00ecnh duy\u1ec7t web kh\u00e1c nhau c\u00f3 th\u1ec3 di\u1ec5n gi\u1ea3i c\u00e1c quy t\u1eafc CSS kh\u00e1c nhau, d\u1eabn \u0111\u1ebfn k\u1ebft xu\u1ea5t kh\u00f4ng nh\u1ea5t qu\u00e1n. Vi\u1ec7c ki\u1ec3m tra v\u00e0 s\u1eed d\u1ee5ng ti\u1ec1n t\u1ed1 c\u1ee7a nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00e1c \u0111\u1ed9ng hi\u1ec7u su\u1ea5t:<\/strong> C\u00e1c t\u1ec7p CSS l\u1edbn v\u00e0 ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm th\u1eddi gian t\u1ea3i trang. Gi\u1ea3m thi\u1ec3u v\u00e0 n\u00e9n c\u00e1c t\u1ec7p CSS c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n<\/li>\n<li>\n<p><strong>Nh\u1eefng th\u00e1ch th\u1ee9c v\u1ec1 thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng:<\/strong> Vi\u1ec7c t\u1ea1o b\u1ed1 c\u1ee5c \u0111\u00e1p \u1ee9ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u00f2i h\u1ecfi ph\u1ea3i l\u1eadp k\u1ebf ho\u1ea1ch v\u00e0 th\u1eed nghi\u1ec7m c\u1ea9n th\u1eadn.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 c\u00e1c so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch.<\/h2>\n<table>\n<thead>\n<tr>\n<th>CSS so v\u1edbi HTML<\/th>\n<th>CSS (B\u1ea3ng ki\u1ec3u x\u1ebfp t\u1ea7ng)<\/th>\n<th>HTML (Ng\u00f4n ng\u1eef \u0111\u00e1nh d\u1ea5u si\u00eau v\u0103n b\u1ea3n)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ee5c \u0111\u00edch<\/td>\n<td>Ki\u1ec3m so\u00e1t vi\u1ec7c tr\u00ecnh b\u00e0y v\u00e0 b\u1ed1 c\u1ee5c c\u1ee7a c\u00e1c trang web.<\/td>\n<td>X\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac v\u00e0 n\u1ed9i dung c\u1ee7a c\u00e1c trang web.<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1ch s\u1eed d\u1ee5ng<\/td>\n<td>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ki\u1ec3u cho c\u00e1c ph\u1ea7n t\u1eed HTML v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c kh\u00eda c\u1ea1nh tr\u1ef1c quan.<\/td>\n<td>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o c\u1ea5u tr\u00fac v\u00e0 n\u1ed9i dung c\u1ee7a trang web.<\/td>\n<\/tr>\n<tr>\n<td>C\u00fa ph\u00e1p<\/td>\n<td>Bao g\u1ed3m c\u00e1c b\u1ed9 ch\u1ecdn v\u00e0 c\u1eb7p gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh.<\/td>\n<td>Bao g\u1ed3m c\u00e1c th\u1ebb v\u00e0 th\u00e0nh ph\u1ea7n c\u00f3 thu\u1ed9c t\u00ednh.<\/td>\n<\/tr>\n<tr>\n<td>Ph\u1ea7n m\u1edf r\u1ed9ng t\u1eadp tin<\/td>\n<td>.css<\/td>\n<td>.html<\/td>\n<\/tr>\n<tr>\n<td>V\u00ed d\u1ee5 s\u1eed d\u1ee5ng<\/td>\n<td>Thay \u0111\u1ed5i m\u00e0u ph\u00f4ng ch\u1eef, \u0111\u1eb7t l\u1ec1, \u00e1p d\u1ee5ng h\u00ecnh \u0111\u1ed9ng.<\/td>\n<td>X\u00e1c \u0111\u1ecbnh ti\u00eau \u0111\u1ec1, \u0111o\u1ea1n v\u0103n, h\u00ecnh \u1ea3nh, li\u00ean k\u1ebft, v.v.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS).<\/h2>\n<p>T\u01b0\u01a1ng lai c\u1ee7a CSS c\u00f3 th\u1ec3 s\u1ebd t\u1eadp trung v\u00e0o vi\u1ec7c n\u00e2ng cao h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng thi\u1ebft k\u1ebf web v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng. M\u1ed9t s\u1ed1 ph\u00e1t tri\u1ec3n v\u00e0 c\u00f4ng ngh\u1ec7 ti\u1ec1m n\u0103ng bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p><strong>CSS4 v\u00e0 h\u01a1n th\u1ebf n\u1eefa:<\/strong> C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt CSS s\u1ebd ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, gi\u1edbi thi\u1ec7u c\u00e1c m\u00f4-\u0111un v\u00e0 t\u00ednh n\u0103ng m\u1edbi \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ph\u00e1t tri\u1ec3n web lu\u00f4n thay \u0111\u1ed5i.<\/p>\n<\/li>\n<li>\n<p><strong>CSS-trong-JS:<\/strong> Vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn CSS-in-JS, trong \u0111\u00f3 CSS \u0111\u01b0\u1ee3c vi\u1ebft tr\u1ef1c ti\u1ebfp b\u1eb1ng JavaScript, \u0111ang tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y cung c\u1ea5p t\u00ednh m\u00f4 \u0111un, \u0111\u00f3ng g\u00f3i v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>Th\u00e0nh ph\u1ea7n web:<\/strong> Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c th\u00e0nh ph\u1ea7n web, l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i v\u00e0 t\u00e1i s\u1eed d\u1ee5ng, s\u1ebd t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ki\u1ebfn tr\u00fac CSS, th\u00fac \u0111\u1ea9y c\u00e1c phong c\u00e1ch c\u00f3 t\u1ed5 ch\u1ee9c v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>Houdini:<\/strong> D\u1ef1 \u00e1n Houdini nh\u1eb1m m\u1ee5c \u0111\u00edch cung c\u1ea5p c\u00e1c API c\u1ea5p th\u1ea5p h\u01a1n cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n, cho ph\u00e9p h\u1ecd t\u1ea1o c\u00e1c t\u00ednh n\u0103ng CSS c\u1ee7a ri\u00eang m\u00ecnh v\u00e0 m\u1edf r\u1ed9ng kh\u1ea3 n\u0103ng c\u1ee7a CSS.<\/p>\n<\/li>\n<li>\n<p><strong>Ch\u1ebf \u0111\u1ed9 t\u1ed1i v\u00e0 theo ch\u1ee7 \u0111\u1ec1:<\/strong> CSS c\u00f3 th\u1ec3 th\u1ea5y nh\u1eefng ti\u1ebfn b\u1ed9 trong vi\u1ec7c h\u1ed7 tr\u1ee3 ch\u1ebf \u0111\u1ed9 t\u1ed1i c\u1ea5p h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c t\u00f9y ch\u1ecdn ch\u1ee7 \u0111\u1ec1 n\u00e2ng cao h\u01a1n.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS).<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy v\u00e0 CSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t, quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt c\u1ee7a web. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 k\u1ecbch b\u1ea3n:<\/p>\n<ol>\n<li>\n<p><strong>B\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 hi\u1ec7u su\u1ea5t:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 l\u01b0u v\u00e0o b\u1ed9 \u0111\u1ec7m c\u00e1c t\u1ec7p CSS, gi\u1ea3m t\u1ea3i cho m\u00e1y ch\u1ee7 g\u1ed1c v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang ti\u1ebfp theo cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3m thi\u1ec3u CSS:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n thu nh\u1ecf CSS theo th\u1eddi gian th\u1ef1c, gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ec7p v\u00e0 t\u1ed1i \u01b0u h\u00f3a th\u1eddi gian t\u1ea3i trang.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e2n ph\u1ed1i n\u1ed9i dung:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u00e2n ph\u1ed1i t\u1ec7p CSS t\u1eeb c\u00e1c v\u1ecb tr\u00ed \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 theo \u0111\u1ecba l\u00fd, c\u1ea3i thi\u1ec7n th\u1eddi gian t\u1ea3i cho ng\u01b0\u1eddi d\u00f9ng tr\u00ean to\u00e0n c\u1ea7u.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ea3o v\u1ec7:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt b\u1ed5 sung, l\u1ecdc v\u00e0 ch\u1eb7n m\u00e3 CSS \u0111\u1ed9c h\u1ea1i ho\u1eb7c ng\u0103n ch\u1eb7n m\u1ed9t s\u1ed1 cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean CSS nh\u1ea5t \u0111\u1ecbnh nh\u01b0 t\u1eadp l\u1ec7nh ch\u00e9o trang (XSS).<\/p>\n<\/li>\n<li>\n<p><strong>S\u1ef1 ri\u00eang t\u01b0:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u1ea9n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, cung c\u1ea5p m\u1ee9c \u0111\u1ed9 \u1ea9n danh khi duy\u1ec7t web, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 h\u1eefu \u00edch \u1edf nh\u1eefng qu\u1ed1c gia c\u00f3 quy \u0111\u1ecbnh nghi\u00eam ng\u1eb7t v\u1ec1 internet ho\u1eb7c cho nh\u1eefng ng\u01b0\u1eddi d\u00f9ng mu\u1ed1n b\u1ea3o v\u1ec7 danh t\u00ednh c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng (CSS), h\u00e3y xem x\u00e9t kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/CSS\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u web MDN \u2013 CSS<\/a><\/li>\n<li><a href=\"https:\/\/www.w3schools.com\/css\/\" target=\"_new\" rel=\"noopener nofollow\">W3Schools \u2013 H\u01b0\u1edbng d\u1eabn CSS<\/a><\/li>\n<li><a href=\"https:\/\/css-tricks.com\/\" target=\"_new\" rel=\"noopener nofollow\">Th\u1ee7 thu\u1eadt CSS<\/a><\/li>\n<li><a href=\"https:\/\/css-weekly.com\/\" target=\"_new\" rel=\"noopener nofollow\">CSS h\u00e0ng tu\u1ea7n<\/a><\/li>\n<li><a href=\"https:\/\/www.smashingmagazine.com\/category\/css\/\" target=\"_new\" rel=\"noopener nofollow\">T\u1ea1p ch\u00ed \u0111\u1eadp ph\u00e1 \u2013 CSS<\/a><\/li>\n<\/ol>\n<p>Khi t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 th\u1ebf gi\u1edbi c\u1ee7a B\u1ea3ng \u0111\u1ecbnh ki\u1ec3u x\u1ebfp ch\u1ed3ng, b\u1ea1n s\u1ebd kh\u00e1m ph\u00e1 v\u00f4 s\u1ed1 kh\u1ea3 n\u0103ng m\u00e0 ch\u00fang mang l\u1ea1i \u0111\u1ec3 t\u1ea1o ra tr\u1ea3i nghi\u1ec7m web \u0111\u1eb9p m\u1eaft, ph\u1ea3n h\u1ed3i nhanh v\u00e0 h\u1ea5p d\u1eabn. Cho d\u00f9 b\u1ea1n l\u00e0 ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u hay nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 kinh nghi\u1ec7m, vi\u1ec7c th\u00e0nh th\u1ea1o CSS ch\u1eafc ch\u1eafn s\u1ebd n\u00e2ng cao kh\u1ea3 n\u0103ng t\u1ea1o c\u00e1c trang web tuy\u1ec7t \u0111\u1eb9p \u0111\u1ec3 l\u1ea1i \u1ea5n t\u01b0\u1ee3ng l\u00e2u d\u00e0i cho ng\u01b0\u1eddi d\u00f9ng.<\/p>","protected":false},"featured_media":467830,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476181","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Cascading Stylesheets (CSS)<\/mark>","faq_items":[{"question":"What is Cascading Stylesheets (CSS)?","answer":"<p>Cascading Style Sheets (CSS) is a crucial technology used in web development to control the visual appearance and layout of HTML documents. It allows web developers to separate the content of a website from its design, enabling easy and efficient updates to the site's appearance.<\/p>"},{"question":"How did CSS originate, and when was it first introduced?","answer":"<p>CSS was first proposed by H\u00e5kon Wium Lie and Bert Bos, members of the World Wide Web Consortium (W3C), in 1994. The first official mention of CSS came with the release of CSS level 1 (CSS1) in 1996 as part of the W3C's recommendations.<\/p>"},{"question":"What does CSS do and how does it work?","answer":"<p>CSS operates on the principle of cascading, allowing multiple style sheets to be applied to the same HTML document. The styles are combined based on their specificity and order of application. CSS uses selectors to target HTML elements and applies styles through property-value pairs within a declaration block.<\/p>"},{"question":"What are the key features of CSS?","answer":"<p>CSS offers a range of essential features, including cascading nature, modularity, responsive design, cross-browser compatibility, animations, and layout systems like Flexbox and Grid.<\/p>"},{"question":"What types of CSS exist?","answer":"<p>Various types of CSS include CSS1, CSS2, CSS3, CSS Grid, CSS Flexbox, CSS Transitions, CSS Animations, CSS Variables, and CSS Media Queries.<\/p>"},{"question":"How can CSS be used, and what problems may arise?","answer":"<p>CSS can be used externally through a separate file or internally within the <code>&lt;style&gt;<\/code> element of an HTML document. Problems may arise with specificity conflicts, browser compatibility, performance impact, and challenges in responsive design.<\/p>"},{"question":"What are the future perspectives of CSS?","answer":"<p>The future of CSS may involve CSS4 and beyond, CSS-in-JS approaches, web components, Houdini project, dark mode, and theming support.<\/p>"},{"question":"How can proxy servers be associated with CSS?","answer":"<p>Proxy servers can enhance CSS performance through caching, minification, content delivery, security, and privacy features.<\/p>"},{"question":"Where can I find more information about CSS?","answer":"<p>For more in-depth knowledge about CSS, you can explore resources like MDN Web Docs, W3Schools, CSS Tricks, CSS Weekly, and Smashing Magazine's CSS section. Additionally, OneProxy provides expert guidance on web development and CSS usage.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476181\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/467830"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}