{"id":2286,"date":"2012-03-19T17:15:56","date_gmt":"2012-03-19T09:15:56","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286"},"modified":"2018-01-02T01:23:54","modified_gmt":"2018-01-01T17:23:54","slug":"%e5%b0%8ftip-css%e5%90%8e%e4%bb%a3%e9%80%89%e6%8b%a9%e5%99%a8%e5%8f%af%e8%83%bd%e7%9a%84%e9%94%99%e8%af%af%e8%ae%a4%e8%af%86","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2012\/03\/%e5%b0%8ftip-css%e5%90%8e%e4%bb%a3%e9%80%89%e6%8b%a9%e5%99%a8%e5%8f%af%e8%83%bd%e7%9a%84%e9%94%99%e8%af%af%e8%ae%a4%e8%af%86\/","title":{"rendered":"\u5c0ftip: CSS\u540e\u4ee3\u9009\u62e9\u5668\u53ef\u80fd\u7684\u9519\u8bef\u8ba4\u8bc6"},"content":{"rendered":"<p>by <a href=\"http:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a><br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286<\/a><\/p>\n<h3>\u4e00\u3001\u5173\u4e8e\u7c7b\u9009\u62e9\u5668\u7684\u4e00\u4e2a\u95ee\u9898<\/h3>\n<p>\u5047\u8bbe\u6709\u4e0b\u9762\u4e00\u4e2a\u9762\u8bd5\u9898\uff0cCSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>.red { color: red; }\n.green { color: green; }<\/pre>\n<\/div>\n<p>HTML\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;p>1. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div>\n&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;p>2. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div><\/pre>\n<\/div>\n<p>\u95ee\uff1a\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u6587\u5b57\u989c\u8272\u5206\u522b\u662f\uff1f<\/p>\n<div id=\"classSelector\" style=\"overflow:hidden;_zoom:1;\">\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"classSelector\" id=\"classSelector1\" value=\"0\" \/><label for=\"classSelector1\">A. \u7eff \u7eff<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"classSelector\" id=\"classSelector2\" value=\"0\" \/><label for=\"classSelector2\">B. \u7ea2 \u7ea2<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"classSelector\" id=\"classSelector3\" value=\"1\" \/><label for=\"classSelector3\">C. \u7eff \u7ea2<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"classSelector\" id=\"classSelector4\" value=\"0\" \/><label for=\"classSelector4\">D. \u7ea2 \u7eff<\/label><\/div>\n<\/div>\n<p><script type=\"text\/javascript\">var radioClassSelector = document.getElementById(\"classSelector\").getElementsByTagName(\"input\");for(var index=0; index<radioClassSelector.length; index++){radioClassSelector[index].onclick = function() { if(this.value===\"0\"){alert(\"\u54e5\uff0c\u4e0d\u4f1a\u5427\uff0c\u4f60\u5c45\u7136\u9009\u9519\u4e86\uff01\");}else{alert(\"\u6ca1\u9519\uff0c\u5c31\u662f\u7eff\u8272\u548c\u7ea2\u8272\u989c\u8272\uff01\");}}}<\/script><\/p>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u5f88\u7b80\u5355\uff0c\u6211\u4f30\u8ba1\u57fa\u672c\u4e0a\u90fd\u80fd\u56de\u7b54\u6b63\u786e\uff1aDOM\u8d8a\u6df1\u7684\u7c7b\u540d\u6743\u91cd\u8d8a\u9ad8\uff0c\u56e0\u6b64\uff0c<del datetime=\"2012-03-19T09:30:42+00:00\">\u7b2c\u4e00\u884c\u6587\u5b57\u7ea2\u8272\uff0c\u7b2c\u4e8c\u884c\u6587\u5b57\u7eff\u8272<\/del>\u7b2c\u4e00\u884c\u6587\u5b57\u7eff\u8272\uff0c\u7b2c\u4e8c\u884c\u6587\u5b57\u7ea2\u8272\uff01\u56e0\u6b64\uff0c\u4e0a\u4e00\u9898\u7b54\u6848\u4e3aC.<\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"http:\/\/www.zhangxinxu.com\/study\/201203\/css-class-selector-order-depth-important.html\">CSS\u7c7b\u540d\u9009\u62e9\u5668\u987a\u5e8f\u548c\u5c42\u7ea7\u7684\u6743\u91cd<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\u7c7b\u9009\u62e9\u5668\u987a\u5e8f\u4e0e\u6df1\u5ea6\u6743\u91cd\u6d4b\u8bd5\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201203\/2012-03-19_160629.png\" title=\"\u7c7b\u9009\u62e9\u5668\u987a\u5e8f\u4e0e\u6df1\u5ea6\u6743\u91cd\u6d4b\u8bd5\u622a\u56fe\" class=\"alignnone\" width=\"358\" height=\"155\" \/><\/p>\n<h3>\u4e8c\u3001\u7a0d\u4f5c\u4fee\u6539\uff1a\u7c7b\u9009\u62e9\u5668\u2192\u540e\u4ee3\u9009\u62e9\u5668<\/h3>\n<p>\u518d\u6765\u4e00\u4e2a\u9898\u76ee\uff0c\u5982\u679c\u6211\u4eec\u628a\u4e0a\u4f8b\u7684\u7c7b\u9009\u62e9\u5668\u6539\u6210\u540e\u4ee3\u9009\u62e9\u5668\u4f1a\u5982\u4f55\u5462\uff1f<\/p>\n<div class=\"zxx_code\">\n<pre>.red p { color: red; }\n.green p { color: green; }<\/pre>\n<\/div>\n<p>HTML\u7ef4\u6301\u4e0d\u53d8\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;p>1. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div>\n&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;p>2. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div><\/pre>\n<\/div>\n<p>\u95ee\uff1a\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u6587\u5b57\u989c\u8272\u5206\u522b\u662f\uff1f<\/p>\n<div id=\"descSelector\" style=\"overflow:hidden;_zoom:1;\">\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"descSelector\" id=\"descSelector1\" value=\"1\" \/><label for=\"descSelector1\">A. \u7eff \u7eff<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"descSelector\" id=\"descSelector2\" value=\"0\" \/><label for=\"descSelector2\">B. \u7ea2 \u7ea2<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"descSelector\" id=\"descSelector3\" value=\"0\" \/><label for=\"descSelector3\">C. \u7eff \u7ea2<\/label><\/div>\n<div style=\"width:120px;float:left;\"><input type=\"radio\" name=\"descSelector\" id=\"descSelector4\" value=\"0\" \/><label for=\"descSelector4\">D. \u7ea2 \u7eff<\/label><\/div>\n<\/div>\n<p><script type=\"text\/javascript\">var radioDescSelector = document.getElementById(\"descSelector\").getElementsByTagName(\"input\");for(var descIndex=0; descIndex<radioDescSelector .length; descIndex++){radioDescSelector[descIndex].onclick = function() { if(this.value===\"0\"){alert(\"\u54e6\u5475\u5475\uff0c\u6ca1\u60f3\u5230\u81ea\u5df1\u4f1a\u9009\u9519\u5427\uff01\");}else{alert(\"\u6069\uff0c\u4e0d\u9519\uff0c\u60a8\u9009\u62e9\u4e86\u6b63\u786e\u7684\u7b54\u6848\uff01\");}}}<\/script><\/p>\n<p>\u7ecf\u9a8c\u4f1a\u8f6c\u5316\u4e3a\u5177\u8c61\u5316\u7684\u8ba4\u8bc6\u4ee5\u5e2e\u52a9\u6211\u4eec\u8bb0\u5fc6\uff0c\u7136\u800c\uff0c\u8fd9\u53c8\u5bb9\u6613\u5f62\u6210\u56fa\u5b9a\u601d\u7ef4\uff0c\u5bf9\u4e00\u4e9b\u7c7b\u4f3c\u60c5\u5f62\u9020\u6210\u9519\u8bef\u8ba4\u8bc6\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u6309\u7167\u4e00\u5f00\u59cb\u7c7b\u9009\u62e9\u5668\u7684\u4f8b\u5b50\u6765\u9690\u5c04\u8fd9\u4e2a\u7c7b\u4f3c\u7684\u4f8b\u5b50\uff0c\u60a8\u53ef\u80fd\u5c31\u4f1a\u5f97\u5230\u9519\u8bef\u7684\u7b54\u6848\u2014\u2014\u8fd9\u4e2a\u4f8b\u5b50\u6b63\u786e\u9009\u9879<strong>\u4e0d\u662fC<\/strong>.<\/p>\n<p>\u90a3\u6b63\u786e\u7684\u9009\u9879\u5e94\u8be5\u662f\uff1f<\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a class=\"a_link\" target=\"_blank\" href=\"http:\/\/www.zhangxinxu.com\/study\/201203\/css-descendent-selector-order-depth-important.html\">CSS\u540e\u4ee3\u9009\u62e9\u5668\u987a\u5e8f\u548c\u5c42\u7ea7\u7684\u6743\u91cddemo<\/a><\/p>\n<p>\u60a8\u53ef\u4ee5\u5728\u5404\u4e2a\u6d4f\u89c8\u5668\u4e0b\u770b\u5230\uff0c\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u7684\u6587\u5b57\u90fd\u662f\u7eff\u8272\u7684\uff0c\u5982\u4e0b\u622a\u56fe\u6240\u793a\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"CSS\u540e\u4ee3\u9009\u62e9\u5668\u987a\u5e8f\u548c\u5c42\u7ea7\u7684\u6743\u91cddemo\u6548\u679c\u622a\u56fe \u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201203\/2012-03-19_162756.png\" title=\"CSS\u540e\u4ee3\u9009\u62e9\u5668\u987a\u5e8f\u548c\u5c42\u7ea7\u7684\u6743\u91cddemo\u6548\u679c\u622a\u56fe\" class=\"alignnone\" width=\"315\" height=\"155\" \/><\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\u6b63\u786e\u9009\u9879\u5e94\u8be5<strong>\u662fA<\/strong>.<\/p>\n<p>\u4e3a\u4f55\uff1f<\/p>\n<p>\u8c8c\u4f3c\u8fd9\u79cd\u540e\u4ee3\u9009\u62e9\u5668\u60c5\u5f62\uff0c\u7956\u5148\u9009\u62e9\u5668\u5bf9\u5e94DOM\u65e0\u8bba\u591a\u6df1\u591a\u6d45\u90fd\u662f\u540c\u4e00\u7ea7\u522b\u7684\uff0c\u800c\u6700\u7ec8\u8d77\u4f5c\u7528\u7684\u662f\u9009\u62e9\u5668\u58f0\u660e\u5728CSS\u6837\u5f0f\u4e2d\u7684\u987a\u5e8f\uff0c\u5373\u4f18\u5148\u663e\u793a\u540e\u9762\u7684CSS\u58f0\u660e\u3002<\/p>\n<p>\u672c\u4f8b\u4e2d\uff0c<code>.green p { color: green; }<\/code>\u5728<code>.red p { color: red; }<\/code>\u7684\u540e\u9762\u663e\u793a\uff0c\u56e0\u6b64\uff0c\u4e24\u884c\u6587\u5b57\u90fd\u662f\u7eff\u8272\u7684\u3002\u8981\u662f\u6211\u4eec\u6539\u6210\u4e0b\u9762\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>.green p { color: green; }     <span style=\"color:#000;\">\/* \u6211\u5728\u4e0a\uff0c\u9171\u6cb9\u547d *\/<\/span>\n.red p { color: red; } <span style=\"color:#000;\">    \/* \u6211\u5728\u4e0b\uff0c\u663e\u793a\u6211 *\/<\/span><\/pre>\n<\/div>\n<p>\u90a3\u4e48\uff0c\u4e24\u884c\u6587\u5b57\u5c31\u53d8\u8eab\u4e3a\u7ea2\u8272\u4e86\u3002<\/p>\n<p>\u5982\u679c\u60a8\u76ee\u524d\u624b\u5934\u4e0a\u7684\u662f\u73b0\u4ee3\u6d4f\u89c8\u5668\uff0c\u53ef\u4ee5\u70b9\u51fb<a class=\"a_link\" href=\"http:\/\/www.zhangxinxu.com\/study\/201203\/css-descendent-selector-order-depth-important-editable.html\">\u8fd9\u91cc<\/a>\uff0c\u7f16\u8f91\u4e0bCSS\u4ee3\u7801\u987a\u5e8f\uff08FireFox\u4e0b\u526a\u5207\u7c98\u8d34\u6709\u4e9b\u95ee\u9898\uff0c\u624b\u52a8\u8f93\u5165\uff09\uff0c\u4f1a\u770b\u5230\u53f3\u4fa7\u6587\u5b57\u679c\u4e0d\u5176\u7136\u7ea2\u8272\u4e86~~<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201203\/2012-03-19_164849.png\" title=\"\u53ef\u7f16\u8f91\u7684CSS\u4ee3\u7801\" class=\"alignnone\" width=\"326\" height=\"103\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201203\/2012-03-19_164939.png\" title=\"\u6587\u5b57\u53d8\u8eab\u7ea2\u8272\" class=\"alignnone\" width=\"230\" height=\"149\" \/><\/p>\n<h3>\u4e09\u3001\u518d\u7559\u4e2a\u95ee\u9898<\/h3>\n<p>\u6539\u4e0bCSS\u4ee3\u7801\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>:not(.green)  p { color: red; }\n.green p { color: green; }<\/pre>\n<\/div>\n<p>HTML\u4ee3\u7801\u7ef4\u6301\u4e0d\u53d8\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;p>1. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div>\n&lt;div class=\"<span style=\"color:green;\">green<\/span>\">&lt;div class=\"<span style=\"color:red;\">red<\/span>\">&lt;p>2. \u989c\u8272\u662f\uff1f&lt;\/p>&lt;\/div>&lt;\/div><\/pre>\n<\/div>\n<p>\u95ee\uff1a\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u6587\u5b57\u989c\u8272\u5206\u522b\u662f\uff1f<\/p>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286#comment\">\u8bc4\u8bba<\/a>\u7684\u5f62\u5f0f\u5199\u4e0b\u60a8\u8ba4\u4e3a\u7684\u7b54\u6848~~<img decoding=\"async\" src=\"http:\/\/img.t.sinajs.cn\/t35\/style\/images\/common\/face\/ext\/normal\/e9\/sk_thumb.gif\" \/><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u81ea<a href=\"http:\/\/www.zhangxinxu.com\/\">\u5f20\u946b\u65ed-\u946b\u7a7a\u95f4-\u946b\u751f\u6d3b<\/a>[<a href=\"http:\/\/www.zhangxinxu.com\/\">http:\/\/www.zhangxinxu.com<\/a>]<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=2286<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u901a\u8fc7\u51e0\u4e2a\u7b80\u5355\u7684\u5b9e\u4f8b\uff0c\u4ecb\u7ecd\u5728CSS\u540e\u4ee3\u9009\u62e9\u5668\u4e0a\uff0c\u4e00\u4e9b\u540c\u884c\u53ef\u80fd\u5b58\u5728\u7684\u4e00\u4e9b\u9519\u8bef\u8ba4\u8bc6\u3002\u867d\u662f\u77ed\u7bc7\uff0c\u4f46\u662f\u6e90\u4ee3\u7801\u5c55\u793a\uff0c\u5fc5\u8981\u7684demo\u9875\u9762\u4ee5\u53ca\u6548\u679c\u622a\u56fe\u4ff1\u5168\u3002\u5e0c\u671b\u672c\u6587\u7684\u5185\u5bb9\u80fd\u591f\u5bf9\u60a8\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1271,449,212,251],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2286"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2286"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/2286\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}