{"id":5059,"date":"2023-11-07T08:41:55","date_gmt":"2023-11-07T01:41:55","guid":{"rendered":"https:\/\/mhgvietnam.com\/?p=5059"},"modified":"2023-11-07T08:42:02","modified_gmt":"2023-11-07T01:42:02","slug":"css-la-gi-ngon-ngu-css-dung-de-lam-gi","status":"publish","type":"post","link":"https:\/\/mhgvietnam.com\/en\/css-la-gi-ngon-ngu-css-dung-de-lam-gi\/","title":{"rendered":"CSS L\u00e0 G\u00ec? Ng\u00f4n Ng\u1eef CSS D\u00f9ng \u0110\u1ec3 L\u00e0m G\u00ec?\u00a0"},"content":{"rendered":"<\/p>\n
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CSS l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng t\u1ea1o n\u00ean c\u00e1c website hi\u1ec7n nay. V\u1edbi CSS, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c trang web \u1ea5n t\u01b0\u1ee3ng cho c\u00f4ng ty c\u1ee7a m\u00ecnh ho\u1eb7c cho ch\u00ednh b\u1ea1n. V\u1eady CSS l\u00e0 g\u00ec? Ng\u00f4n ng\u1eef CSS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec v\u00e0 t\u1ea1i sao CSS l\u1ea1i c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong m\u1ed9t website, h\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u trong b\u00e0i vi\u1ebft n\u00e0y nh\u00e9.<\/p>\n

<\/span>CSS l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

CSS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Cascading Style Sheets, l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u1eb1m m\u1ee5c \u0111\u00edch \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh t\u1ea1o n\u00ean m\u1ed9t website. CSS \u0111\u01b0\u1ee3c ra m\u1eaft v\u00e0o n\u0103m 1996 b\u1edfi World Wide Web Consortium (W3C).\u00a0<\/p>\n

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\"css\"\"css\"<\/figure>\n<\/div>\n

CSS x\u1eed l\u00fd m\u1ed9t ph\u1ea7n giao di\u1ec7n c\u1ee7a trang web. S\u1eed d\u1ee5ng CSS, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t m\u00e0u s\u1eafc c\u1ee7a v\u0103n b\u1ea3n, ki\u1ec3u ph\u00f4ng ch\u1eef, kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111o\u1ea1n v\u0103n, c\u00e1ch c\u00e1c c\u1ed9t \u0111\u01b0\u1ee3c \u0111\u1eb7t k\u00edch th\u01b0\u1edbc v\u00e0 b\u1ed1 c\u1ee5c, h\u00ecnh \u1ea3nh ho\u1eb7c m\u00e0u n\u1ec1n n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, thi\u1ebft k\u1ebf b\u1ed1 c\u1ee5c, c\u00e1c bi\u1ebfn th\u1ec3 hi\u1ec3n th\u1ecb cho c\u00e1c thi\u1ebft b\u1ecb v\u00e0 k\u00edch th\u01b0\u1edbc m\u00e0n h\u00ecnh kh\u00e1c nhau c\u0169ng nh\u01b0 h\u00e0ng lo\u1ea1t c\u00e1c hi\u1ec7u \u1ee9ng kh\u00e1c.<\/p>\n

C\u00e1ch CSS ho\u1ea1t \u0111\u1ed9ng \u0111\u00f3 ch\u00ednh l\u00e0 t\u00ecm ki\u1ebfm d\u1ef1a tr\u00ean v\u00f9ng ch\u1ecdn ch\u1eb3ng h\u1ea1n nh\u01b0 th\u1ebb HTML, ID, class, v.v. Sau \u0111\u00f3, n\u00f3 s\u1ebd \u00e1p d\u1ee5ng nh\u1eefng thu\u1ed9c t\u00ednh bu\u1ed9c ph\u1ea3i thay \u0111\u1ed5i l\u00ean c\u00e1c v\u00f9ng \u0111\u00e3 ch\u1ecdn.\u00a0<\/p>\n

CSS r\u1ea5t d\u1ec5 h\u1ecdc v\u00e0 d\u1ec5 hi\u1ec3u nh\u01b0ng n\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t m\u1ea1nh m\u1ebd vi\u1ec7c tr\u00ecnh b\u00e0y t\u00e0i li\u1ec7u HTML. Th\u00f4ng th\u01b0\u1eddng nh\u1ea5t, CSS \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ng\u00f4n ng\u1eef \u0111\u00e1nh d\u1ea5u HTML ho\u1eb7c XHTML.<\/p>\n

HTML v\u00e0 CSS c\u00f3 m\u1ed1i quan h\u1ec7 g\u1eafn b\u00f3 m\u1eadt thi\u1ebft v\u1edbi nhau. N\u1ebfu HTML l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a m\u1ed9t trang web th\u00ec CSS l\u00e0 t\u1ea5t c\u1ea3 t\u00ednh th\u1ea9m m\u1ef9 c\u1ee7a to\u00e0n b\u1ed9 trang web \u0111\u00f3.<\/p>\n

<\/span>M\u1ed1i quan h\u1ec7 c\u1ee7a CSS v\u00e0 HTML<\/strong><\/span><\/h2>\n

Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp, CSS v\u00e0 HTML c\u00f3 m\u1ed1i quan h\u1ec7 m\u1eadt thi\u1ebft trong vi\u1ec7c x\u00e2y d\u1ef1ng m\u1ed9t website. N\u1ebfu HTML l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ed9ng c\u01a1 c\u1ee7a m\u1ed9t chi\u1ebfc xe h\u01a1i th\u00ec CSS s\u1ebd l\u00e0 ki\u1ec3u d\u00e1ng v\u00e0 m\u00e0u s\u1eafc c\u1ee7a chi\u1ebfc xe.\u00a0<\/p>\n

M\u1ed9t trang web c\u00f3 th\u1ec3 ch\u1ea1y m\u00e0 kh\u00f4ng c\u1ea7n CSS, nh\u01b0ng n\u00f3 ch\u1eafc ch\u1eafn s\u1ebd kh\u00f4ng c\u00f3 t\u00ecnh th\u1ea9m m\u1ef9. CSS l\u00e0m cho giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng c\u1ee7a m\u1ed9t trang web t\u1ecfa s\u00e1ng v\u00e0 mang \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng tuy\u1ec7t v\u1eddi. N\u1ebfu kh\u00f4ng c\u00f3 CSS, c\u00e1c trang web s\u1ebd k\u00e9m b\u1eaft m\u1eaft h\u01a1n v\u00e0 c\u00f3 th\u1ec3 kh\u00f3 \u0111i\u1ec1u h\u01b0\u1edbng h\u01a1n nhi\u1ec1u. Ngo\u00e0i b\u1ed1 c\u1ee5c v\u00e0 \u0111\u1ecbnh d\u1ea1ng, CSS ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 m\u00e0u ch\u1eef, k\u00edch th\u01b0\u1edbc h\u00ecnh \u1ea3nh, kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111o\u1ea1n v\u00e0 h\u01a1n th\u1ebf n\u1eefa.<\/p>\n

\u0110\u1ecdc th\u00eam:<\/strong> 20+ Nguy\u00ean T\u1eafc V\u00e0 Xu H\u01b0\u1edbng Thi\u1ebft K\u1ebf UI\/UX N\u1ed5i B\u1eadt<\/p>\n

<\/span>B\u1ed1 c\u1ee5c v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t \u0111o\u1ea1n CSS<\/strong><\/span><\/h2>\n

<\/span>B\u1ed1 c\u1ee5c c\u1ee7a m\u1ed9t \u0111o\u1ea1n CSS<\/strong><\/span><\/h3>\n

B\u1ed1 c\u1ee5c c\u1ee7a m\u1ed9t \u0111o\u1ea1n CSS ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o h\u00ecnh h\u1ed9p v\u1edbi m\u1ed7i h\u1ed9p chi\u1ebfm nh\u1eefng kho\u1ea3ng tr\u1ed1ng tr\u00ean trang web v\u1edbi c\u00e1c thu\u1ed9c t\u00ednh ch\u00ednh nh\u01b0:<\/p>\n

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  • Padding: L\u00e0 c\u00e1c kh\u00f4ng gian xung quanh n\u1ed9i dung (v\u00ed d\u1ee5: kh\u00f4ng gian xung quanh \u0111o\u1ea1n v\u0103n b\u1ea3n).<\/li>\n
  • Border: L\u00e0 c\u00e1c \u0111\u01b0\u1eddng n\u1eb1m ngo\u00e0i ph\u1ea7n \u0111\u1ec7m.<\/li>\n
  • Margin: L\u00e0 kho\u1ea3ng c\u00e1ch bao quanh ph\u00eda ngo\u00e0i c\u1ee7a ph\u1ea7n t\u1eed.<\/li>\n<\/ul>\n

    <\/span>C\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t \u0111o\u1ea1n CSS<\/strong><\/span><\/h3>\n

    Th\u00f4ng th\u01b0\u1eddng, m\u1ed9t \u0111o\u1ea1n CSS s\u1ebd bao g\u1ed3m c\u00e1c ph\u1ea7n:<\/p>\n

    v\u00f9ng ch\u1ecdn {thu\u1ed9c t\u00ednh: gi\u00e1 tr\u1ecb; thu\u1ed9c t\u00ednh: gi\u00e1 tr\u1ecb;\u2026.. }<\/em><\/p>\n

    \u0110o\u1ea1n CSS s\u1ebd \u0111\u01b0\u1ee3c khai b\u00e1o b\u1eb1ng v\u00f9ng ch\u1ecdn, c\u00e1c thu\u1ed9c t\u00ednh, gi\u00e1 tr\u1ecb n\u1eb1m trong d\u1ea5u ngo\u1eb7c nh\u1ecdn. M\u1ed7i thu\u1ed9c t\u00ednh l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb ri\u00eang \u1edf d\u1ea1ng s\u1ed1, ho\u1eb7c ch\u00ednh l\u00e0 t\u00ean c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb \u0111\u00e3 c\u00f3 trong danh s\u00e1ch c\u1ee7a CSS.\u00a0<\/p>\n

    Quy t\u1eafc khai b\u00e1o \u0111\u00f3 ch\u00ednh l\u00e0: thu\u1ed9c t\u00ednh v\u00e0 gi\u00e1 tr\u1ecb c\u1ea7n c\u00e1ch nhau b\u1eb1ng d\u1ea5u hai ch\u1ea5m, m\u1ed7i d\u00f2ng khai b\u00e1o thu\u1ed9c t\u00ednh c\u1ea7n c\u00f3 d\u1ea5u ch\u1ea5m ph\u1ea9y cu\u1ed1i c\u00f9ng. C\u00e1c thu\u1ed9c t\u00ednh kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n \u1edf m\u1ed9t v\u00f9ng ch\u1ecdn.\u00a0<\/p>\n

    Trong \u0111\u00f3:\u00a0<\/p>\n

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    • B\u1ed9 ch\u1ecdn (Selector): m\u1eabu \u0111\u1ec3 ch\u1ecdn ph\u1ea7n t\u1eed HTML m\u00e0 b\u1ea1n mu\u1ed1n \u0111\u1ecbnh ngh\u0129a phong c\u00e1ch. B\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c selector cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/li>\n<\/ul>\n
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      • T\u1ea5t c\u1ea3 nh\u1eefng ph\u1ea7n t\u1eed \u0111\u01b0\u1ee3c \u0111\u1ecbnh d\u1ea1ng theo m\u1ed9t d\u1ea1ng c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3, v\u00ed d\u1ee5 ph\u1ea7n t\u1eed ti\u00eau \u0111\u1ec1 h2.<\/li>\n
      • Thu\u1ed9c t\u00ednh id, class c\u1ee7a ph\u1ea7n t\u1eed.<\/li>\n
      • C\u00e1c ph\u1ea7n t\u1eed c\u00f3 m\u1ed1i li\u00ean quan v\u1edbi c\u00e1c ph\u1ea7n t\u1eed kh\u00e1c trong h\u1ec7 th\u1ed1ng c\u00e2y ph\u00e2n c\u1ea5p t\u00e0i li\u1ec7u.<\/li>\n<\/ul>\n
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        • Khai b\u00e1o (Declaration): Kh\u1ed1i khai b\u00e1o c\u00f3 th\u1ec3 ch\u1ee9a m\u1ed9t ho\u1eb7c nhi\u1ec1u khai b\u00e1o v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch v\u1edbi nhau b\u1eb1ng d\u1ea5u ch\u1ea5m ph\u1ea9y. M\u1ed7i khai b\u00e1o l\u1ea1i bao g\u1ed3m t\u00ean & gi\u00e1 tr\u1ecb \u0111\u1eb7c t\u00ednh CSS, d\u01b0\u1ee3c ph\u00e2n t\u00e1ch v\u1edbi nhau b\u1eb1ng d\u1ea5u ph\u1ea9y. Quy t\u1eafc khai b\u00e1o CSS l\u00e0 ch\u00fang lu\u00f4n ph\u1ea3i k\u1ebft th\u00fac b\u1eb1ng d\u1ea5u ch\u1ea5m ph\u1ea9y, v\u00e0 kh\u1ed1i khai b\u00e1o ph\u1ea3i n\u1eb1m trong c\u00e1c d\u1ea5u ngo\u1eb7c m\u00f3c.<\/li>\n
        • Thu\u1ed9c t\u00ednh (Properties): Thu\u1ed9c t\u00ednh l\u00e0 c\u00e1c c\u00e1ch th\u1ee9c m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ki\u1ec3u cho m\u1ed9t ph\u1ea7n t\u1eed HTML. V\u00ec v\u1eady, v\u1edbi CSS, b\u1ea1n ch\u1ec9 c\u1ea7n l\u1ef1a ch\u1ecdn thu\u1ed9c t\u00ednh m\u00e0 b\u1ea1n mu\u1ed1n t\u00e1c \u0111\u1ed9ng nh\u1ea5t trong b\u1ed9 quy t\u1eafc b\u1ea1n \u0111\u00e3 t\u1ea1o ra.<\/li>\n
        • Gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh: \u0110\u01b0\u1ee3c n\u1eb1m \u1edf b\u00ean ph\u1ea3i c\u1ee7a thu\u1ed9c t\u00ednh. Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u1ed9t thu\u1ed9c t\u00ednh trong s\u1ed1 \u0111\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 l\u1ea7n xu\u1ea5t hi\u1ec7n c\u1ee7a thu\u1ed9c t\u00ednh.\u00a0<\/li>\n<\/ul>\n

          B\u1ea1n c\u00f3 th\u1ec3 xem danh s\u00e1ch c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a CSS t\u1ea1i CSS Reference c\u1ee7a Mozilla.<\/p>\n

          <\/span>\u01afu \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef CSS l\u00e0 g\u00ec?\u00a0<\/strong><\/span><\/h2>\n

          Ng\u00f4n ng\u1eef CSS c\u00f3 m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m nh\u01b0 sau:<\/p>\n

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          • T\u0103ng t\u1ed1c \u0111\u1ed9 t\u1ea3i trang: CSS cho ph\u00e9p b\u1ea1n s\u1eed d\u1ee5ng \u00edt \u0111o\u1ea1n m\u00e3 v\u00ec v\u1eady t\u1ed1c \u0111\u1ed9 t\u1ea3i trang s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. Ngo\u00e0i ra, b\u1ea1n c\u00f2n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t quy t\u1eafc CSS v\u00e0 \u00e1p d\u1ee5ng n\u00f3 cho t\u1ea5t c\u1ea3 c\u00e1c l\u1ea7n xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t th\u1ebb nh\u1ea5t \u0111\u1ecbnh trong t\u00e0i li\u1ec7u HTML.<\/li>\n
          • C\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng: CSS kh\u00f4ng ch\u1ec9 l\u00e0m cho c\u00e1c trang web d\u1ec5 nh\u00ecn h\u01a1n, n\u00f3 c\u00f2n gi\u00fap c\u00e1c website c\u00f3 \u0111\u1ecbnh d\u1ea1ng th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng. Khi c\u00e1c n\u00fat v\u00e0 v\u0103n b\u1ea3n \u1edf v\u1ecb tr\u00ed h\u1ee3p l\u00fd v\u00e0 \u0111\u01b0\u1ee3c s\u1eafp \u0111\u1eb7t t\u1ed1t, tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/li>\n
          • Th\u1eddi gian ph\u00e1t tri\u1ec3n nhanh: V\u1edbi CSS, b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc v\u00e0 ki\u1ec3u \u0111\u1ecbnh d\u1ea1ng c\u1ee5 th\u1ec3 cho nhi\u1ec1u trang b\u1eb1ng m\u1ed9t chu\u1ed7i m\u00e3. M\u1ed9t bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u x\u1ebfp t\u1ea7ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c sao ch\u00e9p tr\u00ean m\u1ed9t s\u1ed1 trang web. V\u00ed d\u1ee5: n\u1ebfu b\u1ea1n c\u00f3 c\u00e1c trang s\u1ea3n ph\u1ea9m t\u1ea5t c\u1ea3 ph\u1ea3i c\u00f3 c\u00f9ng \u0111\u1ecbnh d\u1ea1ng, giao di\u1ec7n, th\u00ec vi\u1ec7c vi\u1ebft quy t\u1eafc CSS cho m\u1ed9t trang s\u1ebd \u0111\u1ee7 cho t\u1ea5t c\u1ea3 c\u00e1c trang c\u00f9ng lo\u1ea1i.<\/li>\n
          • Thay \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng d\u1ec5 d\u00e0ng: N\u1ebfu b\u1ea1n c\u1ea7n thay \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng c\u1ee7a m\u1ed9t nh\u00f3m trang c\u1ee5 th\u1ec3, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y v\u1edbi CSS m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i s\u1eeda t\u1eebng trang ri\u00eang l\u1ebb. Ch\u1ec9 c\u1ea7n ch\u1ec9nh s\u1eeda bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u CSS t\u01b0\u01a1ng \u1ee9ng v\u00e0 b\u1ea1n s\u1ebd th\u1ea5y c\u00e1c thay \u0111\u1ed5i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho t\u1ea5t c\u1ea3 c\u00e1c trang \u0111ang s\u1eed d\u1ee5ng bi\u1ec3u \u0111\u1ecbnh ki\u1ec3u \u0111\u00f3.<\/li>\n
          • Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch tr\u00ean c\u00e1c thi\u1ebft b\u1ecb: Thi\u1ebft k\u1ebf web \u0111\u00e1p \u1ee9ng l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng. Trong th\u1eddi \u0111\u1ea1i ng\u00e0y nay, c\u00e1c trang web ph\u1ea3i hi\u1ec3n th\u1ecb \u0111\u1ea7y \u0111\u1ee7 v\u00e0 c\u00f3 th\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng d\u1ec5 d\u00e0ng tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb. Cho d\u00f9 thi\u1ebft b\u1ecb di \u0111\u1ed9ng hay m\u00e1y t\u00ednh b\u1ea3ng, m\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n hay th\u1eadm ch\u00ed l\u00e0 TV th\u00f4ng minh, CSS k\u1ebft h\u1ee3p v\u1edbi HTML \u0111\u1ec3 t\u1ea1o ra thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng.<\/li>\n<\/ul>\n

            <\/span>CSS th\u1ef1c s\u1ef1 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?\u00a0<\/strong><\/span><\/h2>\n
            \n
            \"ngo\u0302n\"ngo\u0302n<\/figure>\n<\/div>\n

            Khi tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb m\u1ed9t t\u00e0i li\u1ec7u, n\u00f3 ph\u1ea3i k\u1ebft h\u1ee3p n\u1ed9i dung c\u1ee7a t\u00e0i li\u1ec7u v\u1edbi ki\u1ec3u c\u00e1ch m\u00e0 n\u00f3 s\u1ebd xu\u1ea5t hi\u1ec7n. N\u00f3 x\u1eed l\u00fd t\u00e0i li\u1ec7u theo m\u1ed9t s\u1ed1 giai \u0111o\u1ea1n m\u00e0 Ch\u00fang t\u00f4i s\u1ebd li\u1ec7t k\u00ea b\u00ean d\u01b0\u1edbi. H\u00e3y nh\u1edb r\u1eb1ng \u0111\u00e2y l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n r\u1ea5t \u0111\u01a1n gi\u1ea3n c\u1ee7a nh\u1eefng g\u00ec x\u1ea3y ra khi m\u1ed9t tr\u00ecnh duy\u1ec7t t\u1ea3i m\u1ed9t trang web v\u00e0 c\u00e1c tr\u00ecnh duy\u1ec7t kh\u00e1c nhau s\u1ebd x\u1eed l\u00fd quy tr\u00ecnh theo nh\u1eefng c\u00e1ch kh\u00e1c nhau.\u00a0<\/p>\n

              \n
            • B\u01b0\u1edbc 1: Tr\u00ecnh duy\u1ec7t t\u1ea3i HTML (v\u00ed d\u1ee5: nh\u1eadn n\u00f3 t\u1eeb m\u1ea1ng).<\/li>\n
            • B\u01b0\u1edbc 2: Tr\u00ecnh duy\u1ec7t chuy\u1ec3n \u0111\u1ed5i HTML th\u00e0nh DOM (Document Object Model \u2013 M\u00f4 h\u00ecnh \u0111\u1ed1i t\u01b0\u1ee3ng t\u00e0i li\u1ec7u). DOM \u0111\u1ea1i di\u1ec7n cho t\u00e0i li\u1ec7u trong b\u1ed9 nh\u1edb c\u1ee7a m\u00e1y t\u00ednh.<\/li>\n
            • B\u01b0\u1edbc 3: Tr\u00ecnh duy\u1ec7t t\u00ecm n\u1ea1p h\u1ea7u h\u1ebft c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u00e0i li\u1ec7u HTML, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u00ecnh \u1ea3nh nh\u00fang, video v\u00e0 th\u1eadm ch\u00ed c\u1ea3 CSS \u0111\u01b0\u1ee3c li\u00ean k\u1ebft. Sau \u0111\u00f3, JavaScript \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong qu\u00e1 tr\u00ecnh n\u00e0y.<\/li>\n
            • B\u01b0\u1edbc 4: Tr\u00ecnh duy\u1ec7t ph\u00e2n t\u00edch c\u00fa ph\u00e1p CSS \u0111\u00e3 t\u00ecm n\u1ea1p v\u00e0 s\u1eafp x\u1ebfp c\u00e1c quy t\u1eafc kh\u00e1c nhau theo lo\u1ea1i b\u1ed9 ch\u1ecdn c\u1ee7a ch\u00fang th\u00e0nh c\u00e1c \u201cnh\u00f3m\u201d kh\u00e1c nhau. V\u00ed d\u1ee5: ph\u1ea7n t\u1eed, l\u1edbp, ID, v.v. D\u1ef1a tr\u00ean c\u00e1c b\u1ed9 ch\u1ecdn m\u00e0 n\u00f3 t\u00ecm th\u1ea5y, n\u00f3 s\u1ebd t\u00ecm ra c\u00e1c quy t\u1eafc n\u00ean \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c n\u00fat n\u00e0o trong DOM v\u00e0 \u0111\u00ednh k\u00e8m ki\u1ec3u cho ch\u00fang theo y\u00eau c\u1ea7u (b\u01b0\u1edbc trung gian n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e2y k\u1ebft xu\u1ea5t).<\/li>\n
            • B\u01b0\u1edbc 5: C\u00e2y k\u1ebft xu\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u1ea5u tr\u00fac m\u00e0 n\u00f3 s\u1ebd xu\u1ea5t hi\u1ec7n sau khi c\u00e1c quy t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho n\u00f3.<\/li>\n
            • B\u01b0\u1edbc 6: H\u00ecnh \u1ea3nh hi\u1ec3n th\u1ecb tr\u1ef1c quan c\u1ee7a trang \u0111\u01b0\u1ee3c \u0111\u01b0a ra m\u00e0n h\u00ecnh (giai \u0111o\u1ea1n n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 painting).<\/li>\n<\/ul>\n

              <\/span>3 c\u00e1ch nh\u00fang CSS v\u00e0o website<\/strong><\/span><\/h2>\n

              C\u00f3 ba c\u00e1ch nh\u00fang CSS v\u00e0o website:<\/p>\n

                \n
              • Nh\u00fang CSS tr\u1ef1c ti\u1ebfp CSS v\u00e0o t\u00e0i li\u1ec7u HTML (Inline CSS)<\/li>\n
              • N\u1ed9i tuy\u1ebfn (Internal CSS)<\/li>\n
              • Ngo\u1ea1i tuy\u1ebfn (External CSS)<\/li>\n<\/ul>\n

                H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 3 c\u00e1ch nh\u00fang CSS d\u01b0\u1edbi \u0111\u00e2y nh\u00e9.<\/p>\n

                <\/span>Nh\u00fang CSS tr\u1ef1c ti\u1ebfp CSS v\u00e0o t\u00e0i li\u1ec7u HTML (Inline CSS)<\/strong><\/span><\/h3>\n

                V\u1edbi c\u00e1ch n\u00e0y, ch\u00fang ta \u0111\u1eb7t m\u00e3 CSS v\u00e0o th\u1eb3ng thu\u1ed9c t\u00ednh style c\u1ee7a ph\u1ea7n t\u1eed. V\u00e0 v\u1edbi c\u00e1ch nh\u00fang tr\u1ef1c ti\u1ebfp, m\u00e3 CSS s\u1ebd ch\u1ec9 t\u00e1c \u0111\u1ed9ng l\u00ean ch\u00ednh ph\u1ea7n t\u1eed \u0111\u00f3.<\/p>\n

                \u0110\u1ec3 ch\u1ec9 \u0111\u1ecbnh nhi\u1ec1u quy t\u1eafc CSS, ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u1ea5u ch\u1ea5m ph\u1ea9y \u0111\u1ec3 ng\u0103n c\u00e1ch gi\u1eefa c\u00e1c rules. C\u00e1c rules n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng thu\u1ed9c t\u00ednh \u201cstyle\u201d k\u00e8m theo t\u00ean thu\u1ed9c t\u00ednh, gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh.<\/p>\n

                <\/span>N\u1ed9i tuy\u1ebfn (Internal CSS)<\/strong><\/span><\/h3>\n

                V\u1edbi c\u00e1ch nh\u00fang n\u1ed9i tuy\u1ebfn, b\u1ea1n c\u1ea7n d\u00f9ng th\u1ebb <style> \u0111\u1ec3 t\u1ea1o ra khu v\u1ef1c vi\u1ebft CSS. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ec3 CSS \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u trong HTML, nh\u01b0ng n\u00ean \u0111\u1eb7t <style> trong th\u1ebb <head>.\u00a0<\/p>\n

                <\/span>Ngo\u1ea1i tuy\u1ebfn (External CSS)<\/strong><\/span><\/h3>\n

                Trong External CSS, ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng ph\u1ea7n t\u1eed \u201clink\u201d \u0111\u1ec3 th\u00eam c\u00e1c style sheet \u1edf b\u00ean ngo\u00e0i v\u00e0o trong t\u00e0i li\u1ec7u HTML.<\/p>\n

                Tr\u01b0\u1edbc h\u1ebft ch\u00fang ta c\u1ea7n t\u1ea1o c\u00e1c rules (quy t\u1eafc) trong m\u1ed9t file ri\u00eang c\u00f3 ph\u1ea7n \u0111u\u00f4i m\u1edf r\u1ed9ng l\u00e0 .css. Ti\u1ebfp theo, b\u1ea1n c\u1ea7n th\u00eam file CSS n\u00e0y v\u00e0o ph\u1ea7n t\u1eed head trong t\u00e0i li\u1ec7u HTML.<\/p>\n

                \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 nh\u00fang CSS v\u00e0o t\u00e0i li\u1ec7u HTML. V\u1edbi c\u00e1ch ch\u00e8n n\u00e0y, c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 vi\u1ebft CSS cho nhi\u1ec1u trang web kh\u00e1c nhau v\u00e0 b\u1ed5 sung c\u00f9ng m\u1ed9t file CSS cho t\u1ea5t c\u1ea3 c\u00e1c trang t\u01b0\u01a1ng t\u1ef1.<\/p>\n

                K\u1ebft lu\u1eadn\u00a0<\/strong><\/p>\n

                Tr\u00ean \u0111\u00e2y b\u1ea1n \u0111\u00e3 c\u00f9ng Ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u v\u1ec1 CSS l\u00e0 g\u00ec v\u00e0 ng\u00f4n ng\u1eef CSS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec. Hi v\u1ecdng b\u00e0i vi\u1ebft tr\u00ean \u0111\u00e3 mang \u0111\u1ebfn cho c\u00e1c b\u1ea1n nh\u1eefng th\u00f4ng tin h\u1eefu \u00edch m\u00e0 b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm nh\u00e9.<\/p>\n

                <\/p>\n

                <\/div>\n
                \n
                <\/div>\n<\/p><\/div>\n

                <\/p>\n

                <\/div>\n

                <\/p>\n

                <\/div>\n

                <\/p>\n

                \"t\u1ea3i\"t\u1ea3i<\/div>\n

                \n <\/div>","protected":false},"excerpt":{"rendered":"

                CSS l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng t\u1ea1o n\u00ean c\u00e1c website hi\u1ec7n nay. V\u1edbi CSS, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c trang web \u1ea5n t\u01b0\u1ee3ng cho c\u00f4ng ty c\u1ee7a m\u00ecnh ho\u1eb7c cho ch\u00ednh b\u1ea1n. V\u1eady CSS l\u00e0 g\u00ec? Ng\u00f4n ng\u1eef CSS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec v\u00e0 t\u1ea1i sao CSS l\u1ea1i c\u00f3 vai tr\u00f2 quan tr\u1ecdng […]<\/p>\n","protected":false},"author":1,"featured_media":6829,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-5059","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghe"],"_links":{"self":[{"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/posts\/5059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/comments?post=5059"}],"version-history":[{"count":1,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/posts\/5059\/revisions"}],"predecessor-version":[{"id":6830,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/posts\/5059\/revisions\/6830"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/media\/6829"}],"wp:attachment":[{"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=5059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=5059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mhgvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=5059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}