{"id":779,"date":"2018-02-25T20:40:36","date_gmt":"2018-02-25T12:40:36","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/25\/css-%e4%bc%aa%e7%b1%bb\/"},"modified":"2018-02-25T20:40:36","modified_gmt":"2018-02-25T12:40:36","slug":"css-%e4%bc%aa%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=779","title":{"rendered":"CSS \u4f2a\u7c7b"},"content":{"rendered":"
\n
\n

CSS \u4f2a\u7c7b(Pseudo-classes)<\/span>
\n<\/h1>\n
\n

CSS\u4f2a\u7c7b\u662f\u7528\u6765\u6dfb\u52a0\u4e00\u4e9b\u9009\u62e9\u5668\u7684\u7279\u6b8a\u6548\u679c\u3002<\/p>\n

\n

\u8bed\u6cd5<\/h2>\n

\u4f2a\u7c7b\u7684\u8bed\u6cd5\uff1a<\/p>\n

\n
\nselector:pseudo-class {property:value;}<\/div>\n<\/div>\n

CSS\u7c7b\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4f2a\u7c7b\uff1a<\/p>\n

\n
\nselector.class:pseudo-class {property:value;}<\/div>\n<\/div>\n

<\/p>\n

\n

anchor\u4f2a\u7c7b<\/h2>\n

\u5728\u652f\u6301 CSS \u7684\u6d4f\u89c8\u5668\u4e2d\uff0c\u94fe\u63a5\u7684\u4e0d\u540c\u72b6\u6001\u90fd\u53ef\u4ee5\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u663e\u793a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
a<\/span>:link<\/span> <\/span>{<\/span>color:<\/span>#FF0000<\/span><\/span>;<\/span>}<\/span> <\/span>\/*<\/span> \u672a\u8bbf\u95ee\u7684\u94fe\u63a5 <\/span>*\/<\/span>
\n<\/span>a<\/span>:visited<\/span> <\/span>{<\/span>color:<\/span>#00FF00<\/span><\/span>;<\/span>}<\/span> <\/span>\/*<\/span> \u5df2\u8bbf\u95ee\u7684\u94fe\u63a5 <\/span>*\/<\/span>
\n<\/span>a<\/span>:hover<\/span> <\/span>{<\/span>color:<\/span>#FF00FF<\/span><\/span>;<\/span>}<\/span> <\/span>\/*<\/span> \u9f20\u6807\u5212\u8fc7\u94fe\u63a5 <\/span>*\/<\/span>
\n<\/span>a<\/span>:active<\/span> <\/span>{<\/span>color:<\/span>#0000FF<\/span><\/span>;<\/span>}<\/span> <\/span>\/*<\/span> \u5df2\u9009\u4e2d\u7684\u94fe\u63a5 <\/span>*\/<\/span><\/div>\n<\/div>\n<\/div>\n

\u6ce8\u610f\uff1a<\/b> \u5728CSS\u5b9a\u4e49\u4e2d\uff0ca:hover \u5fc5\u987b\u88ab\u7f6e\u4e8e a:link \u548c a:visited \u4e4b\u540e\uff0c\u624d\u662f\u6709\u6548\u7684\u3002<\/p>\n

\u6ce8\u610f\uff1a<\/b> \u5728 CSS \u5b9a\u4e49\u4e2d\uff0ca:active \u5fc5\u987b\u88ab\u7f6e\u4e8e a:hover \u4e4b\u540e\uff0c\u624d\u662f\u6709\u6548\u7684\u3002<\/p>\n

\u6ce8\u610f\uff1a<\/b>\u4f2a\u7c7b\u7684\u540d\u79f0\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u3002<\/p>\n

\n

\u4f2a\u7c7b\u548cCSS\u7c7b<\/h2>\n

\u4f2a\u7c7b\u53ef\u4ee5\u4e0e CSS \u7c7b\u914d\u5408\u4f7f\u7528\uff1a<\/p>\n

\n
\n
a<\/span>.red<\/span>:visited<\/span> <\/span>{<\/span>color:<\/span>#FF0000<\/span><\/span>;<\/span>}<\/span><\/p>\n

<<\/span>a<\/span> <\/span>class<\/span>=”<\/span>red<\/span>” <\/span>href<\/span>=”<\/span>css-syntax<\/span>.html<\/span>“><\/span>CSS<\/span> \u8bed\u6cd5<\/<\/span>a<\/span>><\/span><\/div>\n<\/div>\n<\/div>\n

\u5982\u679c\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u7684\u94fe\u63a5\u5df2\u88ab\u8bbf\u95ee\uff0c\u5b83\u4f1a\u663e\u793a\u4e3a\u7ea2\u8272\u3002<\/p>\n

\n

CSS – :first – child\u4f2a\u7c7b<\/h2>\n

\u60a8\u53ef\u4ee5\u4f7f\u7528 :first-child \u4f2a\u7c7b\u6765\u9009\u62e9\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20<\/p>\n

\u6ce8\u610f\uff1a<\/b>\u5728IE8\u7684\u4e4b\u524d\u7248\u672c\u5fc5\u987b\u58f0\u660e<!DOCTYPE><\/a> \uff0c\u8fd9\u6837 :first-child \u624d\u80fd\u751f\u6548\u3002<\/p>\n

\u5339\u914d\u7b2c\u4e00\u4e2a <p> \u5143\u7d20<\/h2>\n

\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u9009\u62e9\u5668\u5339\u914d\u4f5c\u4e3a\u4efb\u4f55\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u7684 <p> \u5143\u7d20\uff1a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
p<\/span>:first-child<\/span>
\n<\/span>{<\/span>
\n <\/span>color:<\/span>blue<\/span><\/span>;
\n<\/span>}<\/span><\/div>\n<\/div>\n

\n<\/div>\n

\n

\u5339\u914d\u6240\u6709<p> \u5143\u7d20\u4e2d\u7684\u7b2c\u4e00\u4e2a <i> \u5143\u7d20<\/h2>\n

\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u9009\u62e9\u76f8\u5339\u914d\u7684\u6240\u6709<p>\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a <i> \u5143\u7d20\uff1a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
p<\/span> > <\/span>i<\/span>:first-child<\/span>
\n<\/span>{<\/span>
\n <\/span>color:<\/span>blue<\/span><\/span>;
\n<\/span>}<\/span><\/div>\n<\/div>\n

\n<\/div>\n

\n

\u5339\u914d\u6240\u6709\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u7684 <p> \u5143\u7d20\u4e2d\u7684\u6240\u6709 <i> \u5143\u7d20<\/h2>\n

\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u9009\u62e9\u5668\u5339\u914d\u6240\u6709\u4f5c\u4e3a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u7684 <p> \u5143\u7d20\u4e2d\u7684\u6240\u6709 <i> \u5143\u7d20\uff1a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
p<\/span>:first-child<\/span> <\/span>i<\/span>
\n<\/span>{<\/span>
\n <\/span>color:<\/span>blue<\/span><\/span>;
\n<\/span>}<\/span><\/div>\n<\/div>\n

\n<\/div>\n

\n

CSS – :lang \u4f2a\u7c7b<\/h2>\n

:lang \u4f2a\u7c7b\u4f7f\u4f60\u6709\u80fd\u529b\u4e3a\u4e0d\u540c\u7684\u8bed\u8a00\u5b9a\u4e49\u7279\u6b8a\u7684\u89c4\u5219<\/p>\n

\u6ce8\u610f\uff1a<\/b>IE8\u5fc5\u987b\u58f0\u660e<!DOCTYPE><\/a>\u624d\u80fd\u652f\u6301;lang\u4f2a\u7c7b\u3002<\/p>\n

\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c:lang \u7c7b\u4e3a\u5c5e\u6027\u503c\u4e3a no \u7684q\u5143\u7d20\u5b9a\u4e49\u5f15\u53f7\u7684\u7c7b\u578b\uff1a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
q<\/span>:lang<\/span>(<\/span>no<\/span>) <\/span>{<\/span>quotes:<\/span> “~” “~”<\/span><\/span>;<\/span>}<\/span><\/div>\n<\/div>\n

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

<\/p>\n

\n
\n\"Examples\"<\/p>\n

\u66f4\u591a\u5b9e\u4f8b<\/h2>\n<\/div>\n

\n\u8fd9\u4e2a\u4f8b\u5b50\u6f14\u793a\u4e86\u5982\u4f55\u4e3a\u8d85\u94fe\u63a5\u6dfb\u52a0\u5176\u4ed6\u6837\u5f0f\u3002<\/p>\n

\n\u8fd9\u4e2a\u4f8b\u5b50\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 :focus\u4f2a\u7c7b\u3002 <\/p>\n

\n

\u6240\u6709CSS\u4f2a\u7c7b\/\u5143\u7d20<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u9009\u62e9\u5668<\/th>\n\u793a\u4f8b<\/th>\n\u793a\u4f8b\u8bf4\u660e<\/th>\n<\/tr>\n
:checked<\/a><\/td>\ninput:checked<\/td>\n\u9009\u62e9\u6240\u6709\u9009\u4e2d\u7684\u8868\u5355\u5143\u7d20<\/td>\n<\/tr>\n
:disabled<\/a><\/td>\ninput:disabled<\/td>\n\u9009\u62e9\u6240\u6709\u7981\u7528\u7684\u8868\u5355\u5143\u7d20<\/td>\n<\/tr>\n
:empty<\/a><\/td>\np:empty<\/td>\n\u9009\u62e9\u6240\u6709\u6ca1\u6709\u5b50\u5143\u7d20\u7684p\u5143\u7d20<\/td>\n<\/tr>\n
:enabled<\/a><\/td>\ninput:enabled<\/td>\n\u9009\u62e9\u6240\u6709\u542f\u7528\u7684\u8868\u5355\u5143\u7d20<\/td>\n<\/tr>\n
:first-of-type<\/a><\/td>\np:first-of-type<\/td>\n\u9009\u62e9\u6bcf\u4e2a\u7236\u5143\u7d20\u662fp\u5143\u7d20\u7684\u7b2c\u4e00\u4e2ap\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:in-range<\/a><\/td>\ninput:in-range<\/td>\n\u9009\u62e9\u5143\u7d20\u6307\u5b9a\u8303\u56f4\u5185\u7684\u503c<\/td>\n<\/tr>\n
:invalid<\/a><\/td>\ninput:invalid<\/td>\n\u9009\u62e9\u6240\u6709\u65e0\u6548\u7684\u5143\u7d20<\/td>\n<\/tr>\n
:last-child<\/a><\/td>\np:last-child<\/td>\n\u9009\u62e9\u6240\u6709p\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:last-of-type<\/a><\/td>\np:last-of-type<\/td>\n\u9009\u62e9\u6bcf\u4e2ap\u5143\u7d20\u662f\u5176\u6bcd\u5143\u7d20\u7684\u6700\u540e\u4e00\u4e2ap\u5143\u7d20<\/td>\n<\/tr>\n
:not(selector)<\/a><\/td>\n:not(p)<\/td>\n\u9009\u62e9\u6240\u6709p\u4ee5\u5916\u7684\u5143\u7d20<\/td>\n<\/tr>\n
:nth-child(n)<\/a><\/td>\np:nth-child(2)<\/td>\n\u9009\u62e9\u6240\u6709p\u5143\u7d20\u7684\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:nth-last-child(n)<\/a><\/td>\np:nth-last-child(2)<\/td>\n\u9009\u62e9\u6240\u6709p\u5143\u7d20\u5012\u6570\u7684\u7b2c\u4e8c\u4e2a\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:nth-last-of-type(n)<\/a><\/td>\np:nth-last-of-type(2)<\/td>\n\u9009\u62e9\u6240\u6709p\u5143\u7d20\u5012\u6570\u7684\u7b2c\u4e8c\u4e2a\u4e3ap\u7684\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:nth-of-type(n)<\/a><\/td>\np:nth-of-type(2)<\/td>\n\u9009\u62e9\u6240\u6709p\u5143\u7d20\u7b2c\u4e8c\u4e2a\u4e3ap\u7684\u5b50\u5143\u7d20<\/td>\n<\/tr>\n
:only-of-type<\/a><\/td>\np:only-of-type<\/td>\n\u9009\u62e9\u6240\u6709\u4ec5\u6709\u4e00\u4e2a\u5b50\u5143\u7d20\u4e3ap\u7684\u5143\u7d20<\/td>\n<\/tr>\n
:only-child<\/a><\/td>\np:only-child<\/td>\n\u9009\u62e9\u6240\u6709\u4ec5\u6709\u4e00\u4e2a\u5b50\u5143\u7d20\u7684p\u5143\u7d20<\/td>\n<\/tr>\n
:optional<\/a><\/td>\ninput:optional<\/td>\n\u9009\u62e9\u6ca1\u6709”required”\u7684\u5143\u7d20\u5c5e\u6027<\/td>\n<\/tr>\n
:out-of-range<\/a><\/td>\ninput:out-of-range<\/td>\n\u9009\u62e9\u6307\u5b9a\u8303\u56f4\u4ee5\u5916\u7684\u503c\u7684\u5143\u7d20\u5c5e\u6027<\/td>\n<\/tr>\n
:read-only<\/a><\/td>\ninput:read-only<\/td>\n\u9009\u62e9\u53ea\u8bfb\u5c5e\u6027\u7684\u5143\u7d20\u5c5e\u6027<\/td>\n<\/tr>\n
:read-write<\/a><\/td>\ninput:read-write<\/td>\n\u9009\u62e9\u6ca1\u6709\u53ea\u8bfb\u5c5e\u6027\u7684\u5143\u7d20\u5c5e\u6027<\/td>\n<\/tr>\n
:required<\/a><\/td>\ninput:required<\/td>\n\u9009\u62e9\u6709”required”\u5c5e\u6027\u6307\u5b9a\u7684\u5143\u7d20\u5c5e\u6027<\/td>\n<\/tr>\n
:root<\/a><\/td>\nroot<\/td>\n\u9009\u62e9\u6587\u6863\u7684\u6839\u5143\u7d20<\/td>\n<\/tr>\n
:target<\/a><\/td>\n#news:target<\/td>\n\u9009\u62e9\u5f53\u524d\u6d3b\u52a8#news\u5143\u7d20(\u70b9\u51fbURL\u5305\u542b\u951a\u7684\u540d\u5b57)<\/td>\n<\/tr>\n
:valid<\/a><\/td>\ninput:valid<\/td>\n\u9009\u62e9\u6240\u6709\u6709\u6548\u503c\u7684\u5c5e\u6027<\/td>\n<\/tr>\n
:link<\/a><\/td>\na:link<\/td>\n\u9009\u62e9\u6240\u6709\u672a\u8bbf\u95ee\u94fe\u63a5<\/td>\n<\/tr>\n
:visited<\/a><\/td>\na:visited<\/td>\n\u9009\u62e9\u6240\u6709\u8bbf\u95ee\u8fc7\u7684\u94fe\u63a5<\/td>\n<\/tr>\n
:active<\/a><\/td>\na:active<\/td>\n\u9009\u62e9\u6b63\u5728\u6d3b\u52a8\u94fe\u63a5<\/td>\n<\/tr>\n
:hover<\/a><\/td>\na:hover<\/td>\n\u628a\u9f20\u6807\u653e\u5728\u94fe\u63a5\u4e0a\u7684\u72b6\u6001<\/td>\n<\/tr>\n
:focus<\/a><\/td>\ninput:focus<\/td>\n\u9009\u62e9\u5143\u7d20\u8f93\u5165\u540e\u5177\u6709\u7126\u70b9<\/td>\n<\/tr>\n
:first-letter<\/a><\/td>\np:first-letter<\/td>\n\u9009\u62e9\u6bcf\u4e2a<p> \u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd<\/td>\n<\/tr>\n
:first-line<\/a><\/td>\np:first-line<\/td>\n\u9009\u62e9\u6bcf\u4e2a<p> \u5143\u7d20\u7684\u7b2c\u4e00\u884c<\/td>\n<\/tr>\n
:first-child<\/a><\/td>\np:first-child<\/td>\n\u9009\u62e9\u5668\u5339\u914d\u5c5e\u4e8e\u4efb\u610f\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u7684 <p> \u5143\u7d20<\/td>\n<\/tr>\n
:before<\/a><\/td>\np:before<\/td>\n\u5728\u6bcf\u4e2a<p>\u5143\u7d20\u4e4b\u524d\u63d2\u5165\u5185\u5bb9<\/td>\n<\/tr>\n
:after<\/a><\/td>\np:after<\/td>\n\u5728\u6bcf\u4e2a<p>\u5143\u7d20\u4e4b\u540e\u63d2\u5165\u5185\u5bb9<\/td>\n<\/tr>\n
:lang(language<\/i>)<\/a><\/td>\np:lang(it)<\/td>\n\u4e3a<p>\u5143\u7d20\u7684lang\u5c5e\u6027\u9009\u62e9\u4e00\u4e2a\u5f00\u59cb\u503c<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

CSS \u4f2a\u7c7b(Pseudo-classes) CSS\u4f2a\u7c7b\u662f\u7528\u6765\u6dfb\u52a0\u4e00\u4e9b\u9009\u62e9\u5668\u7684\u7279\u6b8a\u6548\u679c\u3002 …<\/span><\/p>\n

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