{"id":6115,"date":"2017-05-06T01:32:11","date_gmt":"2017-05-05T17:32:11","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6115"},"modified":"2018-01-10T23:33:10","modified_gmt":"2018-01-10T15:33:10","slug":"html-area-map","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/05\/html-area-map\/","title":{"rendered":"HTML <area><map>\u6807\u7b7e\u53ca\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"

by zhangxinxu<\/a> from http:\/\/www.zhangxinxu.com\/wordpress\/?p=6115<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\u4e4b\u524d\uff0c\u6211\u4e00\u76f4\u4ee5\u4e3aHTML <area><\/code>\u662f\u4e00\u4e2a\u9e21\u808bHTML\uff0c\u4f30\u8ba1\u5230\u4e86HTML5\u65f6\u4ee3\u4f1a\u88ab\u5e9f\u5f03\u7684\u547d\u3002\u4f46\u662f\uff0c\u6700\u8fd1\u4e00\u67e5\u8d44\u6599\uff0c\u4e56\u4e56\u4e86\u4e2a\u549a\uff0c\u4e0d\u4ec5\u6ca1\u88ab\u5e9f\u5f03\uff0c\u53cd\u800c\u53d1\u5c55\u4e86\uff0c\u65b0\u589e\u4e86\u4e00\u4e9b\u6807\u7b7e\u5c5e\u6027\uff0c\u4f8b\u5982rel<\/code>\uff0cmedia<\/code>\uff0chreflang<\/code>\u7b49\u3002<\/p>\n

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\u4e00\u3001HTML <area>\u539f\u672c\u4f5c\u7528<\/h3>\n

HTML <area><\/code>\u539f\u672c\u4f5c\u7528\u662f\u7ed9<img><\/code>\u56fe\u50cf\u6807\u8bb0\u70ed\u70b9\u533a\u57df\u7528\u7684\u3002\u4f8b\u5982\u4e00\u5f20\u4e2d\u56fd\u7701\u4efd\u5730\u56fe\uff0c\u70b9\u51fb\u5bf9\u5e94\u7701\u4efd\u663e\u793a\u5bf9\u5e94\u7701\u4efd\u4ecb\u7ecd\u7684\u9875\u9762\uff1b\u53c8\u6216\u8005\u65ed\u65ed\u5f71\u9662\u6216\u8005\u65ed\u65ed\u9910\u5385\u7684\u5ea7\u4f4d\u5e73\u9762\u56fe\uff0c\u70b9\u51fb\u5bf9\u5e94\u5ea7\u4f4d\u9009\u5ea7\uff0c\u90fd\u662f\u53ef\u4ee5\u4f7f\u7528<area><\/code>\u6807\u7b7e\u7684\u3002<\/p>\n

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HTML\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

<img src=\"mm1.jpg\" alt=\"\u7f8e\u5973\" usemap=\"#MM\">\n<map id=\"MM\" name=\"MM\">\n    <area shape=\"rect\" coords=\"20,20,80,80\" href=\"#rect\" alt=\"\u77e9\u5f62\">\n    <area shape=\"circle\" coords=\"200,50,50\" href=\"#circle\" alt=\"\u5706\u5f62\">\n    <area shape=\"poly\" coords=\"150,100,200,120,180,130,190,180,150,150,100,160,140,120,100,110\" href=\"#poly\" alt=\"\u591a\u8fb9\u5f62\">\n<\/map><\/pre>\n
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\n
shape<\/strong><\/dt>\n
shape<\/code>\u8868\u793a\u70b9\u51fb\u70ed\u70b9\u533a\u57df\u7684\u5f62\u72b6\uff0c\u652f\u6301\u77e9\u5f62rect<\/code>\uff0c\u5706\u5f62circle<\/code>\u4ee5\u53ca\u591a\u8fb9\u5f62poly<\/code>\u3002<\/dd>\n
coords<\/strong><\/dt>\n
coords<\/code>\u8868\u793a\u70b9\u51fb\u70ed\u70b9\u533a\u57df\u5f62\u72b6\u7684\u5750\u6807\u3002\u5750\u6807\u70b90,0<\/code>\u8868\u793a\u56fe\u7247\u7684\u5de6\u4e0a\u89d2\u3002\u5176\u4e2d\u77e9\u5f62rect<\/code>\u652f\u63014<\/code>\u4e2a\u6570\u503c\uff0c2<\/code>\u4e2a\u5750\u6807\uff0c\u5206\u522b\u662f\u77e9\u5f62\u5de6\u4e0a\u89d2\u5750\u6807\u548c\u77e9\u5f62\u53f3\u4e0b\u89d2\u5750\u6807\u3002\u4f8b\u5982\uff0ccoords=\"20,20,80,80\"<\/code>\u751f\u6210\u7684\u5c31\u662f\u4e00\u4e2a\u5de6\u4e0a\u89d2\u5750\u680720,20<\/code>\u5bbd\u9ad8\u90fd\u662f60px<\/code>\u7684\u77e9\u5f62\u533a\u57df\u3002\u5706\u5f62circle<\/code>\u652f\u63013<\/code>\u4e2a\u6570\u503c\uff0c\u524d2<\/code>\u4e2a\u503c\u4e3a\u5706\u5fc3\u5750\u6807\uff0c\u7b2c3<\/code>\u4e2a\u503c\u4e3a\u5706\u7684\u534a\u5f84\u5927\u5c0f\u3002\u591a\u8fb9\u5f62poly<\/code>\u5c31\u66f4\u7b80\u5355\u4e86\uff0c\u6bcf\u4e24\u4e2a\u6570\u503c\u7ec4\u5408\u8868\u793a\u4e00\u4e2a\u5750\u6807\u70b9\uff0c\u4f9d\u6b21\u8fde\u7ebf\u5f62\u6210\u7684\u533a\u57df\u5c31\u662f\u6700\u7ec8\u7684\u70ed\u70b9\u533a\u57df\u3002<\/dd>\n
href<\/strong><\/dt>\n
href<\/code>\u548c<a><\/code>\u5143\u7d20\u7684href<\/code>\u662f\u4e00\u6837\u7684\u4e1c\u897f\uff0c\u76f4\u63a5\u8df3\u8f6c\u5730\u5740\uff0c\u6216\u8005\u951a\u70b9\u7b49\u3002\u4e5f\u540c\u6837\u652f\u6301target<\/code>\u5c5e\u6027\u548crel<\/code>\u5c5e\u6027\u3002\u4e5f\u5c31\u662f\u8bf4<area><\/code>\u53ef\u4ee5\u770b\u6210\u662f\u534a\u4e2a<a><\/code>\u5143\u7d20\u3002<\/dd>\n
alt<\/strong><\/dt>\n
alt<\/code>\u540c<img><\/code>\u5143\u7d20\u7684alt<\/code>\uff0c\u8868\u793a\u70ed\u70b9\u533a\u57df\u56fe\u7247\u7684\u63cf\u8ff0\u4fe1\u606f\u3002<\/dd>\n<\/dl>\n
\u5982\u679c<area><\/code>\u8981\u60f3\u548c\u56fe\u7247\u70ed\u70b9\u5173\u8054\uff0c\u7956\u5148\u5143\u7d20<map><\/code>\u662f\u4e0d\u53ef\u7f3a\u5c11\u7684\uff0c\u4f46\u662f\u4e0d\u4e00\u5b9a\u975e\u5f97\u76f4\u63a5\u7236\u5b50\u5173\u7cfb\u3002<map><\/code>\u548c<area><\/code>\u4e4b\u95f4\u518d\u5d4c\u5957\u4e2a<div><\/code>\u4ec0\u4e48\u7684\u529f\u80fd\u4e5f\u662f\u6b63\u5e38\u7684\u3002<\/p>\n
\u5982\u679c\u5355\u4ece<area><\/code>\u539f\u672c\u4f5c\u7528\u6765\u8bb2\uff0c\u8fd9\u5e94\u8be5\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u5b9e\u7528\u4ef7\u503c\u7684\u5c5e\u6027\uff0c\u4f8b\u5982\uff0c\u793e\u4ea4\u7ad9\u70b9\u7684\u56fe\u7247\u5f80\u5f80\u90fd\u4f1a\u6709\u4eba\u7c7b\u8bc6\u522b\u6807\u6ce8\u529f\u80fd\uff0c\u7c7b\u4f3c\u8fd9\u6837\uff1a<\/p>\n
\"\u4e0d\u77e5\u540d\u5e05\u54e5\u4eba\u8138\u8bc6\u522b\u6807\u6ce8\"<\/p>\n
\u8ddf<area><\/code>\u7684\u70ed\u70b9\u770b\u4e0a\u53bb\u5c31\u662f\u4e00\u4e2a\u4e1c\u897f\uff0c\u7136\u800c\uff0c\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u5f88\u5c11\u5f88\u5c11\u4f7f\u7528<area><\/code>\u5143\u7d20\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p>\n
\u56e0\u4e3a\u56fe\u7247\u4e0a\u70ed\u70b9\u533a\u57df\u7684\u6837\u5f0f\u6839\u672c\u65e0\u6cd5\u81ea\u5b9a\u4e49\uff0c\u9664\u4e86\u53ef\u4ee5\u663e\u793aoutline<\/code>\u8f6e\u5ed3\u610f\u5916\uff0c\u4ec0\u4e48\u8fb9\u6846\u80cc\u666f\u8272\u90fd\u4e0d\u884c\uff0c\u5bf9area<\/code>\u8fdb\u884cCSS\u8bbe\u7f6e\uff0c\u4e5f\u4ec5\u4ec5\u662f\u6539\u53d8\u8fd9\u4e2a\u6807\u7b7e\u5143\u7d20\u672c\u8eab\u7684\u6837\u5f0f\uff0c\u800c\u4e0d\u662f\u56fe\u7247\u4e0a\u70ed\u70b9\u70b9\u51fb\u533a\u57df\u7684\u6837\u5f0f\u3002\u4e8e\u662f\uff0c\u6700\u7ec8\uff0c\u56fe\u7247\u4e0a\u7684\u6807\u6ce8\u6216\u8005\u70ed\u70b9\uff0c\u6211\u4eec\u5e38\u5e38\u662f\u4f7f\u7528\u5176\u4ed6\u6807\u7b7e\uff0c\u5982<div><\/code>\uff0c\u6216\u8005<a><\/code>\u6807\u7b7e\u8fdb\u884c\u8986\u76d6\u8fdb\u884c\u6a21\u62df\u3002<\/p>\n
\u4e5f\u5c31\u662f\u8bf4\uff0cHTML <area><\/code>\u53ea\u80fd\u4f5c\u7528\u4e8e\u5bf9\u70b9\u51fb\u70ed\u70b9\u6ca1\u6709\u4efb\u4f55\u6837\u5f0f\u8981\u6c42\u7684\u573a\u666f\u3002\u8003\u8651\u5230\u8fd9\u79cd\u573a\u666f\u4f7f\u7528<a><\/code>\u6807\u7b7e\u6a21\u62df\u4e5f\u662f\u53ef\u4ee5\u7684\uff0c\u8fdb\u4e00\u6b65\u538b\u7f29\u4e86HTML <area><\/code>\u7684\u5b9e\u7528\u4ef7\u503c\u3002\u9664\u975e\u662f\u4e0d\u89c4\u5219\u7684\u70b9\u51fb\u70ed\u70b9\uff0c\u56e0\u4e3a\u8fd9\u79cd\u4e0d\u89c4\u5219\u533a\u57df\u5305\u62ecIE8\u8fd9\u79cd\u4e0d\u652f\u6301CSS3\u7684\u6d4f\u89c8\u5668\u4e5f\u662f\u652f\u6301\u7684\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n
\"IE8\u6d4f\u89c8\u5668\u4e0b\u7684area\u8f6e\u5ed3\u793a\u610f\"<\/p>\n
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\u4e8c\u3001HTML <area>\u884d\u751f\u7684\u66f4\u6709\u4ef7\u503c\u7684\u4f5c\u7528<\/h3>\n
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<a href=\"#1\">11111111111<a href=\"#2\">22222222222<\/a><\/a><\/pre>\n
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\"\u5d4c\u5957a\u6807\u7b7e\u7684\u6e32\u67d3\u8868\u73b0\"<\/p>\n
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\"\"<\/p>\n
\u4e0a\u56fe\u9ec4\u8272\u9ad8\u4eae\u533a\u57df\u70b9\u51fb\u662f\u53bb\u201c\u4e66\u7c4d\u8be6\u7ec6\u9875\u201d\uff0c\u800c\u70b9\u51fb\u5217\u8868\u5176\u5b83\u4efb\u610f\u533a\u57df\u662f\u53bb\u201c\u4e66\u7c4d\u9605\u8bfb\u9875\u201d\uff0c\u8bf7\u95ee\u8be5\u5f53\u5982\u4f55\u5b9e\u73b0\uff1f<\/p>\n
\u4f20\u7edf\u65b9\u6cd5\uff0c\u6bd4\u8f83\u597d\u662f\u6539\u53d8\u89c6\u89c9DOM\u7ed3\u6784\u548c\u987a\u5e8f\uff0c\u4f7f\u94fe\u63a5\u5185\u5bb9\u53d8\u6210\u76f8\u90bb\u5173\u7cfb\uff0c\u518d\u901a\u8fc7CSS\u91cd\u65b0\u5e03\u5c40\u5b9a\u4f4d\uff0c\u867d\u7136\u9ebb\u70e6\u4e86\u70b9\uff0c\u4f46\u81f3\u5c11\u8bed\u4e49\u548c\u65e0\u969c\u788d\u8bbf\u95ee\u8fd9\u4e00\u5757\u8fd8\u662f\u5f88\u597d\u7684\uff1b\u6bd4\u8f83\u6b21\u7684\u65b9\u6cd5\u662f\u4f7f\u7528JS\uff0c\u70b9\u51fb\u76ee\u6807\u533a\u57dfpreventDefault<\/code>\u963b\u6b62\u9ed8\u8ba4\u4e8b\u4ef6\uff0c\u7136\u540e\u518dlocation.href<\/code>\u8df3\u8f6c\u4e4b\u7c7b\u3002<\/p>\n
\u5b9e\u9645\u4e0a\uff0c\u8fd8\u6709\u4e00\u79cd\u66f4\u597d\u7684\u505a\u6cd5\uff0c\u5c31\u662f<a><\/code>\u5143\u7d20\u4e2d\u5d4c\u5957<area><\/code>\u5143\u7d20\uff0c\u53ef\u4ee5\u4fdd\u8bc1DOM\u7ed3\u6784\u7b26\u5408\u89c6\u89c9\u5448\u73b0\uff0c\u53c8\u65e0\u9700JS\u8f85\u52a9\u3002<\/p>\n
\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u501f\u52a9area\u5143\u7d20\u5b9e\u73b0\u7684\u94fe\u63a5\u5d4c\u5957demo<\/a><\/p>\n
demo\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n
\"\u94fe\u63a5\u5d4c\u5957demo\u9875\u9762\u6548\u679c\u622a\u56fe\"<\/p>\n
\u5728Chrome\u548cIE9+\u6d4f\u89c8\u5668\u4e0b\uff0c\u70b9\u51fb\u56fe\u7247\u4ee5\u53ca\u6807\u9898\u4f1a\u8df3\u8f6c\u5230\u201c\u4e66\u7c4d\u8be6\u60c5\u9875\u201d\uff0c\u800c\u70b9\u51fb\u5176\u4ed6\u533a\u57df\u5c31\u4f1a\u8df3\u5230\u201c\u4e66\u7c4d\u9605\u8bfb\u9875\u201d\uff0c\u94fe\u63a5\u5d4c\u5957\u529f\u80fd\u5c31\u8fd9\u4e48\u5b9e\u73b0\u4e86\u3002<\/p>\n
\u5176\u4e2d\uff0cdemo\u4e2d\uff0c\u56fe\u7247\u7684\u94fe\u63a5\u5d4c\u5957\u548c\u6807\u9898\u6587\u5b57\u7684\u5b9e\u73b0\u539f\u7406\u6709\u6240\u4e0d\u540c\u3002<\/p>\n
\u56fe\u7247\u7684\u94fe\u63a5\u5d4c\u5957\u7528\u6cd5\u66f4\u52a0\u89c4\u8303\uff0c\u4e5f\u5c31\u662f\u501f\u52a9<map><\/code>\u548c<area><\/code>\u5143\u7d20\u5728\u56fe\u7247\u4e0a\u521b\u9020\u70b9\u51fb\u70ed\u70b9\uff0c\u76f8\u5173HTML\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<img src=\"book.jpg\" alt=\"\u90fd\u5e02\u730e\u4eba \u9650\u65f6\u514d\u8d39\" usemap=\"#bookCover\">\n<map id=\"bookCover\" name=\"bookCover\">\n    <area shape=\"rect\" coords=\"0,0,54,72\" href=\"book\/1003477570\" alt=\"\u90fd\u5e02\u730e\u4eba \u9650\u65f6\u514d\u8d39\" target=\"_blank\">\n<\/map><\/pre>\n
\u4e5f\u5c31\u662f\u628a\u6574\u4e2a\u56fe\u7247\u533a\u57df\u90fd\u4f5c\u4e3a\u70b9\u51fb\u70ed\u70b9\uff0c\u5145\u5206\u53d1\u6325\u4e86<area><\/code>\u6807\u7b7e\u672c\u8eab\u7684\u7279\u6027\uff0c\u6ca1\u6709\u4efb\u4f55\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u952e\u76d8\u8bbf\u95ee\u7b49\u90fd\u975e\u5e38\u826f\u597d\uff0c\u53c8\u6ee1\u8db3\u6211\u4eec\u94fe\u63a5\u5d4c\u5957\u529f\u80fd\uff0c<area><\/code>\u5143\u7d20\u7684\u5b9e\u7528\u4ef7\u503c\u5927\u5927\u5730\u5f97\u4ee5\u4f53\u73b0\u3002<\/p>\n
\u5bf9\u4e8e\u6807\u9898\u6587\u5b57 \u201c\u90fd\u5e02\u730e\u4eba\u201d\u7684\u94fe\u63a5\u5185\u5d4c\u5904\u7406\u5219\u8981\u9ebb\u70e6\u4e00\u4e9b\u3002demo\u5b9e\u4f8b\u9875\u9762\u7684\u505a\u6cd5\u662f\uff0c\u5728\u6587\u5b57\u524d\u9762\u76f4\u63a5\u653e\u7f6e\u4e86\u4e00\u4e2a\u88f8\u7684<area><\/code>\u5143\u7d20\uff0c\u901a\u8fc7CSS\u8bbe\u7f6e\u8986\u76d6\u6587\u5b57\u5b9e\u73b0\u7684\uff0c\u76f8\u5173HTML\u548cCSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<h4 class=\"book-title\">\n    <area class=\"area\" href=\"\/book\/1003477570\" target=\"_blank\">\n    \u90fd\u5e02\u730e\u4eba\n<\/h4><\/pre>\n
.book-title {\n    position:relative;\n}\n.book-title > .area {\n    position: absolute;\n    left: 0; top: 0;\n    width: 100%; height: 100%;\n}<\/pre>\n
\u8131\u79bb<map><\/code>\u88f8\u9732\u7684<area><\/code>\u5143\u7d20\u5b9e\u9645\u4e0a\u4e5f\u662f\u53ef\u4ee5\u70b9\u51fb\u8df3\u8f6c\u4e86\uff0c\u5c31\u50cf\u4e00\u4e2a<a><\/code>\u94fe\u63a5\u5143\u7d20\u4e00\u6837\uff0c\u4f46\u662f<area><\/code>\u5143\u7d20\u4e0d\u652f\u6301\u5b50\u5143\u7d20\uff0c\u6240\u4ee5\u53ea\u80fd\u8986\u76d6\u3002\u4f46\u662f\uff0c\u5374\u652f\u6301\u4f2a\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\uff0c\u5982\u679c\u5355\u770b\u89c6\u89c9\u8868\u73b0\uff0c\u4f60\u4e5f\u53ef\u4ee5\u8ba9\u6807\u9898\u6587\u5b57\u501f\u52a9:before<\/code>\u7b49\u4f2a\u5143\u7d20\u5b9e\u73b0\u3002<\/p>\n
\u7136\u800c\uff0c\u867d\u7136\u4e3b\u89c2\u529f\u80fd\u90fdOK\u4e86\uff0c\u4ee3\u7801\u4e5f\u5f88\u7cbe\u70bc\uff0c\u4f46\u662f\uff0c\u8fd9\u79cd\u76f4\u63a5\u4f7f\u7528<area><\/code>\u5143\u7d20\u8986\u76d6\u7684\u65b9\u6cd5\u8fd8\u6709\u4e00\u4e9b\u5c40\u9650\uff0c\u4e00\u662fFirefox\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\uff08Firefox\u7684<area><\/code>\u5143\u7d20\u9ed8\u8ba4display:none<\/code>\uff0c\u4e14\u65e0\u6cd5\u91cd\u7f6e\uff09\uff1b\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u5c31\u662f\u65e0\u6cd5\u4f7f\u7528\u952e\u76d8Tab\u7d22\u5f15\u8bbf\u95ee\uff0c\u5982\u679c\u6ca1\u6709\u5916\u9762\u7684<a><\/code>\u5143\u7d20\u662f\u53ef\u4ee5\u7684\uff0c\u6709\u4e86\u4e4b\u540e\uff0c\u8fd9\u79cd\u53d6\u5de7\u7684\u505a\u6cd5\u5c31\u4e0d\u884c\u4e86\u3002<\/p>\n
\u6240\u4ee5\uff0c\u5982\u679c\u4f60\u7684\u9879\u76ee\u517c\u5bb9\u6027\u8981\u6c42\u6bd4\u8f83\u9ad8\uff0c\u5bf9\u65e0\u969c\u788d\u8bbf\u95ee\u8981\u6c42\u4e5f\u6bd4\u8f83\u9ad8\uff0c\u5219\u5efa\u8bae\u4f7f\u7528\u900f\u660e\u56fe\u7247\u8986\u76d6\u7684\u65b9\u5f0f\u5b9e\u73b0\u6587\u5b57\u7684\u94fe\u63a5\u5d4c\u5957\uff0cCSS\u4e0d\u53d8\uff0c\u53ea\u8981HTML\u7a0d\u5fae\u8c03\u6574\u4e0b\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u4e0b\uff1a<\/p>\n
<h4 class=\"book-title\">\n    <img src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAP\/\/\/wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==\" class=\"area\" usemap=\"#mapTitle\">\n    \u90fd\u5e02\u730e\u4eba\n<\/h4>\n<map id=\"mapTitle\" name=\"mapTitle\">\n    <area shape=\"rect\" coords=\"0,0,200,21\" href=\"\/book\/1003477570\" target=\"_blank\">\n<\/map><\/pre>\n
\u4e5f\u5c31\u662f\u628a\u539f\u672c\u88f8\u9732\u7684<area><\/code>\u6362\u6210<img><\/code>\uff0c\u7136\u540e\u518d\u4f7f\u7528<area><\/code>\u5143\u7d20\u521b\u5efa\u56fe\u7247\u70ed\u70b9\u3002\u4e8e\u662f\uff0c\u5404\u5927\u6d4f\u89c8\u5668\u5168\u517c\u5bb9\u7248\u672c\u5c31\u8fd9\u4e48\u5927\u529f\u544a\u6210\u4e86\uff01<\/p>\n
\u4e09\u3001\u7ed3\u675f\u8bed<\/h3>\n
\u5bf9\u4e8eChrome\u4ee5\u53caIE9+\u6d4f\u89c8\u5668\u53ef\u4ee5\u5bf9<area><\/code>\u5143\u7d20\u8fdb\u884c\u6837\u5f0f\u8bbe\u7f6e\uff0c\u800cFirefox4\u4e4b\u540e\u5c31\u4e0d\u53ef\u4ee5\uff0c\u6211\u67e5\u627e\u7f51\u4e0a\u8d44\u6599\uff0c\u53d1\u73b0\u6709\u4eba\u8ba4\u4e3aFirefox\u6d4f\u89c8\u5668\u7684\u505a\u6cd5\u662f\u6b63\u786e\u7684\uff0c\u5305\u62ec10\u5e74\u5c31\u6709\u4eba\u5411Mozilla\u53cd\u9988\u8fd9\u4e2abug\uff0c\u4f46\u662f\uff0c\u4f3c\u4e4eMozilla\u5f00\u53d1\u8005\u575a\u6301\u8ba4\u4e3a\u81ea\u5df1\u662f\u6b63\u786e\u7684\uff0c\u4e5f\u5c31\u662fFirefox\u6d4f\u89c8\u5668\u7684<area><\/code>\u6c38\u8fdc\u90fd\u662fdisplay:none<\/code>\u3002<\/p>\n
\u4e0b\u9762\u5c31\u662f\u4f50\u8bc1Firefox\u6d4f\u89c8\u5668\u7684\u505a\u6cd5\u662f\u6b63\u786e\u7684\u76f8\u5173\u5185\u5bb9\uff0c\u5f15\u7528\u4e86\u5927\u91cf\u89c4\u8303\u5185\u5bb9\uff1a<\/p>\n\n\n\n
\n
OK, so let’s walk through the specs here.  https:\/\/drafts.csswg.org\/cssom-view\/#dom-element-getclientrects<\/a> says:<\/p>\n
\n
If the element on which it was invoked does not have an associated layout box return an empty sequence and stop this algorithm.<\/p>\n<\/blockquote>\n
where “layout box” links to https:\/\/drafts.csswg.org\/cssom-view\/#layout-box<\/a> which says that a “layout box” is either a CSS layout box or an SVG box.  https:\/\/drafts.csswg.org\/cssom-view\/#css-layout-box<\/a> then says that this is the same term the CSS specs use.<\/p>\n
Going to the HTML spec, https:\/\/html.spec.whatwg.org\/multipage\/embedded-content.html#the-area-element<\/a> doesn’t seem to say anything useful on its own (which is not surprising; rendering is described elsewhere in HTML).  https:\/\/html.spec.whatwg.org\/multipage\/embedded-content.html#image-maps<\/a> describes association of <area><\/code> elements with layered shapes on an image, which are not “CSS layout boxes” (not least because they’re not actually box-like in any way; they can have pretty arbitrary shapes).  There’s no SVG involved here, of course.<\/p>\n
OK, on to https:\/\/html.spec.whatwg.org\/multipage\/rendering.html<\/a> which is where HTML describes rendering.  This says, in https:\/\/html.spec.whatwg.org\/multipage\/rendering.html#hidden-elements<\/a>:<\/p>\n
area { display: none; }<\/pre>\n
(the actual selector includes other things).  Great, that’s something to work with.  https:\/\/www.w3.org\/TR\/CSS21\/visuren.html#display-prop<\/a> says:<\/p>\n
\n
none<\/p>\n
… Please note that a display of ‘none’ does not create an invisible box; it creates no box at all.<\/p>\n<\/blockquote>\n
The current css-display draft at https:\/\/drafts.csswg.org\/css-display\/#valdef-display-none<\/a> likewise says:<\/p>\n
\n
The element and its descendants generates no boxes. <\/pre>\n<\/blockquote>\n
So as far as I can tell the Firefox behavior is exactly following the specs here: <area><\/code> elements have no layout boxes, and hence getClientRects<\/code> returns an empty list. <\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5b70\u5bf9\u5b70\u9519\u5176\u5b9e\u6ca1\u591a\u5927\u610f\u4e49\uff0c\u6211\u7b49\u53ea\u8981\u77e5\u9053\u9664\u4e86\u533a\u57df\u70ed\u70b9\uff0c<area><\/code>\u5728\u94fe\u63a5\u5d4c\u5957\u529f\u80fd\u4e0a\u66f4\u6709\u4ef7\u503c\u7686\u53ef\u5b89\u597d\uff01<\/p>\n
\"\u6708\u8272\u771f\u7f8e\"<\/p>\n
\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002
\n\u672c\u6587\u5730\u5740\uff1ahttp:\/\/www.zhangxinxu.com\/wordpress\/?p=6115<\/a><\/p>\n
\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e4b\u524d\uff0c\u6211\u4e00\u76f4\u4ee5\u4e3aHTML <area><\/code>\u662f\u4e00\u4e2a\u9e21\u808bHTML\uff0c\u4f30\u8ba1\u5230\u4e86HTML5\u65f6\u4ee3\u4f1a\u88ab\u5e9f\u5f03\u7684\u547d\u3002\u4f46\u662f\uff0c\u6700\u8fd1\u4e00\u67e5\u8d44\u6599\uff0c\u4e56\u4e56\u4e86\u4e2a\u549a\uff0c\u4e0d\u4ec5\u6ca1\u88ab\u5e9f\u5f03\uff0c\u53cd\u800c\u53d1\u5c55\u4e86\uff0c\u65b0\u589e\u4e86\u4e00\u4e9b\u6807\u7b7e\u5c5e\u6027\uff0c\u4f8b\u5982rel<\/code>\uff0cmedia<\/code>\uff0chreflang<\/code>\u7b49\u3002<\/p>\n
\u7136\u540e\u8fdb\u4e00\u6b65\u7814\u7a76\u53d1\u73b0\uff0c\u5c3c\u739b\u8fd9\u8d27\u5c45\u7136\u8fd8\u53ef\u4ee5\u7528\u6765\u89e3\u51b3\u4e00\u4e2a\u56f0\u6270\u6211\u5f88\u591a\u5e74\u7684\u68d8\u624b\u95ee\u9898\uff0c\u5f62\u8c61\u7acb\u9a6c\u9ad8\u5927\u4e0a\u4e86\u8d77\u6765\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1097],"tags":[1124,9,800,700,372],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/6115"}],"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=6115"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/6115\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=6115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=6115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=6115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}