{"id":1528,"date":"2011-03-20T22:32:56","date_gmt":"2011-03-20T14:32:56","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=1528"},"modified":"2018-01-01T23:04:23","modified_gmt":"2018-01-01T15:04:23","slug":"css-%e7%9b%b8%e5%af%b9%e7%bb%9d%e5%af%b9relativeabsolute%e5%ae%9a%e4%bd%8d%e7%b3%bb%e5%88%97%ef%bc%88%e4%b8%89%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2011\/03\/css-%e7%9b%b8%e5%af%b9%e7%bb%9d%e5%af%b9relativeabsolute%e5%ae%9a%e4%bd%8d%e7%b3%bb%e5%88%97%ef%bc%88%e4%b8%89%ef%bc%89\/","title":{"rendered":"CSS \u76f8\u5bf9\/\u7edd\u5bf9(relative\/absolute)\u5b9a\u4f4d\u7cfb\u5217\uff08\u4e09\uff09"},"content":{"rendered":"

by zhangxinxu<\/a> from http:\/\/www.zhangxinxu.com<\/a>
\n\u672c\u6587\u5730\u5740\uff1ahttp:\/\/www.zhangxinxu.com\/wordpress\/?p=1528<\/a><\/p>\n

\/\/zxx:\u76f4\u63a5\u63a5\u4e0a\u56de<\/a><\/span><\/p>\n

\u4e00\u3001absolute\u6b63\u4e1a\u4e4b\u5143\u7d20\u9690\u85cf<\/h3>\n

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\u63a7\u5236\u5143\u7d20\u663e\u9690\u7684\u65b9\u6cd5\u5f88\u591a\uff0c\u4f46\u662f\u672c\u6587\u4e0d\u662f\u8bb2\u5143\u7d20\u663e\u9690\u63a7\u5236\u7684\uff0c\u6240\u4ee5\uff0c\u53ea\u8bb2\u4e0eabsolute<\/code>\u76f8\u5173\u7684\u4e00\u4e9b\u65b9\u6cd5\u3002<\/p>\n

absolute<\/code>\u5c5e\u6027\u76f8\u5173\u7684\u9690\u85cf\u65b9\u6cd5\uff0c\u6211\u77e5\u9053\u7684\u6709\u4e09\u79cd\uff0c\u5206\u522b\u5982\u4e0b\uff1a<\/p>\n

\n
.hidden{\n    position:absolute;\n    top:-9999em;\n}<\/pre>\n<\/div>\n
\n
.hidden{\n    position:absolute;\n    visibility:hidden;\n}<\/pre>\n<\/div>\n
\n
.hidden{\n    position:absolute;\n    clip: rect(1px 1px 1px 1px); \/* IE6, IE7 *\/<\/span>\n    clip: rect(1px, 1px, 1px, 1px);\n}<\/pre>\n<\/div>\n
\u4f7f\u7528absolute<\/code>\u5c5e\u6027\u63a7\u5236DOM\u5143\u7d20\u7684\u663e\u9690\u6709\u4e09\u4e2a\u5173\u952e\u70b9\uff1a\u9875\u9762\u53ef\u7528\u6027<\/strong>\uff0c\u56de\u6d41\u4e0e\u6e32\u67d3<\/strong>\uff0c\u914d\u5408JavaScript\u7684\u63a7\u5236<\/strong>\u3002<\/p>\n
\u2460 \u53ef\u7528\u6027\u9690\u85cf<\/strong>
\n\u6240\u8c13\u53ef\u7528\u6027\u9690\u85cf\uff0c\u5c31\u662f\u517c\u987e\u5c4f\u5e55\u9605\u8bfb\u5668\u8fd9\u7c7b\u4e92\u8054\u7f51\u9605\u8bfb\u8f85\u52a9\u8bbe\u5907\u7684\u9690\u85cf\u65b9\u5f0f\u3002Yahoo! \u53ef\u7528\u6027\u5b9e\u9a8c\u5ba4\u6210\u5458Ted Drake<\/a>\u5c31\u4e0d\u540c\u9690\u85cf\u65b9\u6cd5\u4e0b\u5c4f\u5e55\u9605\u8bfb\u5668\u7684\u53ef\u7528\u6027\u95ee\u9898\u4f5c\u4e3a\u6d4b\u8bd5\uff0c\u7ed3\u679c\u53d1\u73b0\u4e0b\u9762\u4e24\u79cd\u9690\u85cf\u65b9\u5f0f\u5c4f\u5e55\u9605\u8bfb\u5668\u662f\u8bfb\u4e0d\u4e86\u7684\u3002<\/p>\n
\n
.completelyhidden {\n    display:none;\n}<\/pre>\n<\/div>\n
\n
.visibilityhidden {\n    visibility:hidden;\n}<\/pre>\n<\/div>\n
You don\u2019t want to show those hidden panels to any user. Use display:none<\/strong> for the hidden panels.<\/p>\n
Screen readers will also ignore sections with visibility:hidden<\/strong>.<\/p><\/blockquote>\n
\u6240\u4ee5\uff0c\u4ece\u53ef\u7528\u6027\u89d2\u5ea6\u800c\u8a00\uff0c\u50cf\u201c\u9009\u9879\u5361\u5185\u5bb9\u201d\uff0c\u201c\u66f4\u591a\u6536\u8d77\u5c55\u5f00\u201d\u8fd9\u7c7b\u5143\u7d20\u9690\u85cf\u4e0e\u663e\u793a\u5c31\u4e0d\u63a8\u8350\u4f7f\u7528display:none<\/code>\uff0c \u6216\u8005\u662fposition:absolute + visibility:hidden<\/code>\u3002<\/p>\n
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\n\"\u4f18\u9177\u7f51\u7684\u5c55\u5f00\u8be6\u60c5display:none\u5b9e\u73b0<\/p>\n
\u800c\u5927\u4f17\u70b9\u8bc4\u7f51\u7684\u9690\u85cf\u5c42\u591a\u91c7\u7528position:absolute + visibility:hidden<\/code>\u7684\u65b9\u6cd5\uff0c\u5982\u4e0b\u622a\u56fe\uff1a
\n\"\u5927\u4f17\u70b9\u8bc4\u7f51\u9690\u85cf\u5c42\u7684\u5b9e\u73b0<\/p>\n
\u4e0a\u8ff0\u9690\u85cf\u5185\u5bb9\u5176\u5b9e\u90fd\u662f\u6709\u7528\u7684\u4fe1\u606f\uff0c\u5bf9\u4e8e\u50cf\u76f2\u4eba\u8fd9\u7c7b\u9700\u8981\u501f\u52a9\u5c4f\u5e55\u9605\u8bfb\u5668\u7684\u7528\u6237\u65e0\u6cd5\u77e5\u9053\u8fd9\u4e9b\u4fe1\u606f\u4e86\u3002\u62ff\u4f18\u9177\u7684\u90a3\u4e2a\u4f8b\u5b50\uff0c\u76f2\u4eba\u7528\u6237\u5c31\u65e0\u6cd5\u77e5\u9053\u5f71\u7247\u5b8c\u6574\u7684\u7b80\u4ecb\u3002<\/p>\n
\u5982\u679c\u5e0c\u671b\u9690\u85cf\u5185\u5bb9\u80fd\u591f\u88ab\u8f85\u52a9\u9605\u8bfb\u8bbe\u5907\u8bc6\u522b\uff0c\u5c31\u4e0d\u80fd\u4f7f\u7528display:none<\/code>\u4ee5\u53cavisibility:hidden<\/code>\u9690\u85cf\u5143\u7d20\u3002\u53ef\u4ee5\u4f7f\u7528\u6a21\u62df\u9690\u85cf\u7684\u9690\u85cf\u65b9\u6cd5\uff0c\u53c8\u79f0\u53ef\u7528\u6027\u9690\u85cf\u3002\u5c31\u662f\u4e0b\u9762\u4e24\u79cd\u9690\u85cf\u65b9\u6cd5\u3002<\/p>\n
\n
.hidden{\n    position:absolute;\n    top:-9999em;\n}<\/pre>\n<\/div>\n
\n
.hidden{\n    position:absolute;\n    clip: rect(1px 1px 1px 1px); \/* IE6, IE7 *\/<\/span>\n    clip: rect(1px, 1px, 1px, 1px);\n}<\/pre>\n<\/div>\n
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\u989d\u5916\u8bf4\u660e\uff1a<\/strong>\u5982\u679c\u9690\u85cf\u5143\u7d20\u542b\u6709\u94fe\u63a5\u5143\u7d20\u6216\u662f\u53ef\u83b7\u5f97\u7126\u70b9\u7684\u63a7\u4ef6\u5143\u7d20\uff0c\u4f46\u662f\u53c8\u662f\u4f7f\u7528\u7684\u53ef\u7528\u6027\u9690\u85cf\u3002\u8fd9\u4e9b\u9690\u85cf\u7684\u94fe\u63a5\u4e0e\u63a7\u4ef6\u4e5f\u662f\u53ef\u4ee5\u54cd\u5e94\u952e\u76d8\u7126\u70b9Tab\u5207\u6362\u7684\uff0c\u4f46\u662f\u8fd9\u4f1a\u8ba9\u952e\u76d8\u4f7f\u7528\u7528\u6237\u4ea7\u751f\u4e0d\u89e3\u4e0e\u7591\u60d1\u7684\u3002\u6240\u4ee5\uff0c\u4ece\u67d0\u79cd\u610f\u4e49\u8bf4\uff0c\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8981\u517c\u987e\u5c4f\u5e55\u9605\u8bfb\u5668\u7528\u6237\u548c\u952e\u76d8\u7528\u6237\u6709\u65f6\u5019\u662f\u4e0d\u53ef\u517c\u5f97\u7684\u3002<\/p>\n
\u2461\u56de\u6d41\u4e0e\u6e32\u67d3<\/strong>
\n\u65e9\u5148\u65f6\u5019\u6211\u66fe\u7ffb\u8bd1\u8fc7\u4e24\u7bc7\u5173\u4e8e\u56de\u6d41\u4e0e\u91cd\u7ed8\u7684\u6587\u7ae0\uff0c\u201c\u6700\u5c0f\u5316\u6d4f\u89c8\u5668\u4e2d\u7684\u56de\u6d41(reflow)<\/a>\u201d\u4ee5\u53ca\u201c\u56de\u6d41\u4e0e\u91cd\u7ed8\uff1aCSS\u6027\u80fd\u8ba9JavaScript\u53d8\u6162\uff1f<\/a>\u201d\u3002<\/p>\n
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\u2462\u914d\u5408JavaScript\u7684\u63a7\u5236<\/strong>
\n\u8bf4\u5230\u5143\u7d20\u7684\u663e\u793a\u4e0e\u9690\u85cf\uff0c\u514d\u4e0d\u4e86\u4e0eJavaScript\u7684\u4ea4\u4e92\u3002\u4f8b\u5982display<\/code>\u76f8\u5173\u7684\u9690\u85cf\u4e8e\u663e\u793a\uff0c\u5c31\u662fdisplay:block\/inline\/inline-block\/...<\/code>\u4e0edisplay:none<\/code>\u3002
\n\u8981\u8ba9\u5143\u7d20\u9690\u85cf\uff0c\u5f88\u7b80\u5355\uff0c\u76f4\u63a5\uff1a<\/p>\n
\n
dom.style.display = \"none\";<\/pre>\n<\/div>\n
\u4f46\u662f\uff0c\u5982\u679c\u8981\u663e\u793a\u9690\u85cf\u7684\u5143\u7d20\uff0c\u548b\u529e\u5462\uff1f\u56e0\u4e3a\u4e0d\u540c\u7684\u6807\u7b7e\u6240\u5904\u7684display<\/code>\u6c34\u5e73\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4e8e\u662f\uff0c\u6211\u4eec\u5f88\u96be\u6709\u4e00\u4e2a\u7b80\u5355\u7684\u7edf\u4e00\u7684\u663e\u793a\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u4ee3\u7801\u53ef\u80fd\u4f7f\u7528\u4e8ediv<\/code>, p<\/code>\u6807\u7b7e\uff0c\u4f46\u662f\u5bf9\u4e8espan\u7b49inline\u6c34\u5e73\u7684\u5143\u7d20\uff0c\u53ef\u80fd\u5c31\u4f1a\u55dd\u5c41\u4e86\uff08\u539f\u672c\u5355\u884c\u663e\u793a\u7ed3\u679c\u6362\u884c\uff09\u3002<\/p>\n
\n
dom.style.display = \"block\";<\/pre>\n<\/div>\n
\u51b5\u4e14\uff0c\u968f\u7740\u6d4f\u89c8\u5668\u7684\u4e0d\u65ad\u8fdb\u6b65\uff0c\u4ee5\u540e\u7c7b\u4f3c\u4e8edisplay:table-cell<\/code>\uff0cdisplay:list-item<\/code>\u4f1a\u8d8a\u6765\u8d8a\u591a\u7684\u4f7f\u7528\u3002\u518d\u60f3\u901a\u8fc7display\u5b9e\u73b0\u901a\u7528\u7684\u663e\u9690\u65b9\u6cd5\u96be\u5ea6\u53c8\u4f1a\u589e\u5927\u4e9b\u3002<\/p>\n
\u8fd9\u5c31\u662f\u4f7f\u7528display\u5c5e\u6027\u63a7\u5236\u5143\u7d20\u663e\u9690\u7684\u5c40\u9650\u6027\u3002\u987a\u5e26\u4e00\u63d0\u7684\u662fjQuery\u7684\u663e\u9690\u65b9\u6cd5show()\/hide()\/toggle()<\/code>\u5c31\u662f\u57fa\u4e8edisplay<\/code>\u7684\uff0c\u5176\u4f1a\u5b58\u50a8\u5143\u7d20\u5148\u524d\u7684display<\/code>\u5c5e\u6027\u503c\uff0c\u4e8e\u662f\u5143\u7d20\u518d\u663e\u793a\u7684\u65f6\u5019\u5c31\u53ef\u4ee5\u51c6\u786e\u5730\u663e\u793a\u51fa\u4e4b\u524d\u7684display<\/code>\u503c\u4e86\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1ajQuery\u4e0edisplay\u7684\u663e\u9690\u6d4b\u8bd5<\/a>
\n\"jQuery\u5b58\u50a8display\u6570\u7ec4\u503c<\/p>\n
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\n
dom.style.position = \"static\";\ndom.style.visibility = \"visible\";<\/pre>\n<\/div>\n
\u800c\u7c7b\u4f3c\u7684position:absolute + top:-999em<\/code>\u65b9\u6cd5\uff0c\u5f53\u6211\u4eec\u8981\u8ba9\u5143\u7d20\uff08\u539f\u672c\u975e\u7edd\u5bf9\u5b9a\u4f4d\u5143\u7d20\uff09\u663e\u793a\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ea\u9700\u8981\u8bbe\u7f6e\uff1a<\/p>\n
\n
dom.style.position = \"static\";<\/pre>\n<\/div>\n
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\n
margin-bottom:-3000px; padding-bottom:3000px;<\/pre>\n<\/div>\n
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\n
.equal_height{width:100%; height:999em; position:absolute; left:0; top:0;}<\/pre>\n<\/div>\n
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    \n
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    CSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    \n
    .box{padding:1em; background-color:#f0f3f9; overflow:hidden; _zoom:1;}\n.l{float:left;}\n.abs{position:absolute;}<\/pre>\n<\/div>\n
    HTML\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
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    \uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
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