{"id":7387,"date":"2018-02-24T00:08:11","date_gmt":"2018-02-23T16:08:11","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=7387"},"modified":"2021-01-27T10:24:11","modified_gmt":"2021-01-27T02:24:11","slug":"js-detect-suppot-font-family","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/02\/js-detect-suppot-font-family\/","title":{"rendered":"\u5c0ftips: \u4f7f\u7528JS\u68c0\u6d4b\u7528\u6237\u662f\u5426\u5b89\u88c5\u67d0font-family\u5b57\u4f53"},"content":{"rendered":"

by zhangxinxu<\/a> from http:\/\/www.zhangxinxu.com\/wordpress\/?p=7387<\/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

\u4e00\u3001\u4f7f\u7528JS\u5224\u65ad\u7528\u6237\u64cd\u4f5c\u7cfb\u7edf\u662f\u5426\u5b89\u88c5\u67d0\u5b57\u4f53<\/h3>\n

\u4e0b\u5348\u7a81\u53d1\u7075\u611f\uff0c\u5199\u4e86\u4e00\u6bb5JavaScript\u5c0f\u811a\u672c\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u7528\u6237\u7684\u64cd\u4f5c\u7cfb\u7edf\u662f\u5426\u5b89\u88c5\u4e86\u67d0\u5b57\u4f53\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

var isSupportFontFamily=function(f){if(typeof f!=\"string\"){return false}var h=\"Arial\";if(f.toLowerCase()==h.toLowerCase()){return true}var e=\"a\";var d=100;var a=100,i=100;var c=document.createElement(\"canvas\");var b=c.getContext(\"2d\");c.width=a;c.height=i;b.textAlign=\"center\";b.fillStyle=\"black\";b.textBaseline=\"middle\";var g=function(j){b.clearRect(0,0,a,i);b.font=d+\"px \"+j+\", \"+h;b.fillText(e,a\/2,i\/2);var k=b.getImageData(0,0,a,i).data;return[].slice.call(k).filter(function(l){return l!=0})};return g(h).join(\"\")!==g(f).join(\"\")};<\/pre>\n
\u8bed\u6cd5<\/h4>\n
isSupportFontFamily(fontFamily);<\/pre>\n
\u5176\u4e2dfontFamily<\/code>\u53c2\u6570\u662f\u5fc5\u987b\u7684\uff0c\u4e3aCSS\u4e2dfont-family<\/code>\u8bbe\u7f6e\u7684web\u53ef\u8bc6\u522b\u7684\u5b57\u4f53\u540d\u79f0\uff0c\u4f8b\u5982\u5b8b\u4f53'simsun'<\/code>\uff0c\u5fae\u8f6f\u96c5\u9ed1'Microsoft Yahei'<\/code>\u7b49\u3002<\/p>\n
\u4f8b\u5982\uff0c\u6211\u4eec\u8981\u5224\u65ad\u7528\u6237\u7684\u64cd\u4f5c\u7cfb\u7edf\u662f\u5426\u5b89\u88c5\u4e86\u5fae\u8f6f\u96c5\u9ed1\u5b57\u4f53\uff0c\u53ef\u4ee5\u8fd9\u4e48\u5904\u7406\uff1a<\/p>\n
\/\/ isSupportMicrosoftYahei\u4e3atrue\u6216\u8005false<\/span>\r\nvar isSupportMicrosoftYahei = isSupportFontFamily('Microsoft Yahei');<\/pre>\n
\u5982\u679c\u7528\u6237\u7684\u64cd\u4f5c\u7cfb\u7edf\u5b89\u88c5\u4e86\u5fae\u8f6f\u96c5\u9ed1\uff0c\u5219isSupportMicrosoftYahei<\/code>\u4e3atrue<\/code>\uff0c\u5426\u5219\u4e3afalse<\/code>\u3002<\/p>\n
\u7531\u4e8e\u672c\u68c0\u6d4b\u65b9\u6cd5\u672c\u8d28\u4e0a\u662f\u57fa\u4e8eweb\u68c0\u6d4b\uff0c\u56e0\u6b64\uff0cfontFamily<\/code>\u53c2\u6570\u5fc5\u987b\u662fweb\u53ef\u8bc6\u522b\u7684\uff0c\u56e0\u6b64\uff0c\u5f88\u591a\u4e2d\u6587\u5b57\u4f53\u9700\u8981\u4f7f\u7528\u5176\u82f1\u6587\u540d\u79f0\u5982\u201c\u601d\u6e90\u9ed1\u4f53\u201d\uff0c \u201c\u5170\u4ead\u9ed1\u4f53\u201d\u7b49\uff0c\u5177\u4f53\u540d\u79f0\u662f\u4ec0\u4e48\u53ef\u4ee5\u53c2\u89c1\u6211\u4e4b\u524d\u7684\u6587\u7ae0\uff1a\u201cCSS font-family\u5e38\u89c1\u4e2d\u6587\u5b57\u4f53\u5bf9\u5e94\u7684\u82f1\u6587\u540d\u79f0<\/a>\u201d\u3002<\/p>\n
\"\u5f00\u6e90\u5b57\u4f53\u4e2d\u82f1\u6587\u5bf9\u7167\"<\/p>\n
\u6d4b\u8bd5demo<\/h4>\n
\u4e3a\u4e86\u6f14\u793a\u4e0a\u9762JS\u811a\u672c\u7684\u51c6\u786e\u6027\uff0c\u6211\u7279\u610f\u5236\u4f5c\u4e86\u4e00\u4e2a\u5b9e\u4f8b\u9875\u9762\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u7684\u70b9\u51fb\u8fd9\u91cc\uff1a\u4e00\u4e9b\u4e2d\u6587\u5b57\u4f53\u7cfb\u7edf\u662f\u5426\u5b89\u88c5\u68c0\u6d4bdemo<\/a><\/p>\n
\u4f8b\u5982\uff0c\u5728\u6211\u7684windows\u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u663e\u793a\u6548\u679c\u5982\u4e0b\u622a\u56fe\u6240\u793a\uff1a<\/p>\n
\"\u5b57\u4f53\u662f\u5426\u652f\u6301\u5224\u65ad\u622a\u56fe\"<\/p>\n
\u53e6\u5916\uff0cdemo\u9875\u9762\u6e90\u4ee3\u7801\u6709\u672a\u538b\u7f29\u7684JavaScript\u811a\u672c\u3002<\/p>\n
\u5b9e\u73b0\u539f\u7406<\/h4>\n
\u6839\u636e\u7528\u6237\u8bbe\u7f6e\u7684\u5b57\u4f53\u5c06\u67d0\u4e00\u4e2a\u5b57\u7b26\u7ed8\u5236\u5728canvas<\/code>\u4e0a\uff08fillText()<\/code>\uff09\uff0c\u5e76\u63d0\u53d6\u50cf\u7d20\u4fe1\u606f\uff08getImageData()<\/code>\uff09\uff0c\u7136\u540e\u548c\u9ed8\u8ba4\u5b57\u4f53\u8fdb\u884c\u6bd4\u5bf9\uff0c\u5982\u679c\u50cf\u7d20\u4e0d\u4e00\u81f4\uff0c\u8bf4\u660e\u5b57\u4f53\u751f\u6548\uff0c\u5982\u679c\u50cf\u7d20\u5b8c\u5168\u4e00\u81f4\uff0c\u8bf4\u660e\u5b57\u4f53\u4e0d\u751f\u6548\u3002<\/p>\n
\u517c\u5bb9\u6027<\/h4>\n
IE9+\uff0c\u4ee5\u53ca\u5176\u4ed6\u6240\u6709\u73b0\u4ee3\u6d4f\u89c8\u5668\u3002<\/p>\n
\u4e8c\u3001\u4f7f\u7528JS\u5224\u65ad\u7f51\u9875\u662f\u5426\u652f\u6301\u67d0\u5b57\u4f53\u6e32\u67d3\u5b9e\u4f8b<\/h3>\n
\u4ec0\u4e48\u573a\u666f\u4e0b\u9700\u8981\u5224\u65ad\u7528\u6237\u7684\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301\u67d0\u4e2a\u5b57\u4f53\u7684\u6e32\u67d3\u5462\uff1f<\/p>\n
\u4f8b\u5982\u4e00\u4e9b\u9605\u8bfb\u7c7b\u7684\u573a\u666f\uff0c\u5e0c\u671b\u7528\u6237\u53ef\u4ee5\u81ea\u5df1\u9009\u62e9\u81ea\u5df1\u559c\u6b22\u7684\u5b57\u4f53\u8fdb\u884c\u8bbe\u7f6e\u3002\u5bf9\u4e8ephotoshop\uff0coffice\uff0ckeynote\u7b49\u8f6f\u4ef6\uff0c\u90fd\u662f\u76f4\u63a5\u7cfb\u7edf\u641c\u522e\u5b57\u4f53\uff0c\u5f62\u6210\u5b8c\u6574\u800c\u51c6\u786e\u7684\u5b57\u4f53\u4e0b\u62c9\u3002\u4f46\u662fweb\u9875\u9762\u5e76\u6ca1\u6709\u8fd9\u6837\u7684\u6743\u9650\uff0c\u56e0\u6b64\u6211\u4eec\u53ea\u80fd\u66f2\u7ebf\u6551\u56fd\u3002\u4f8b\u5982\u9ed8\u8ba4\u7ed9\u5b9a50\u4e2a\u5b57\u4f53\u8303\u56f4\u5217\u8868\uff0c\u904d\u5386\u68c0\u6d4b\u7528\u6237\u652f\u6301\u90a3\u4e9b\u5b57\u4f53\uff0c\u652f\u6301\u54ea\u4e2a\u5b57\u4f53\u5c31\u589e\u52a0\u54ea\u4e2a\u4e0b\u62c9\u9009\u9879\uff0c\u4e8e\u662f\u6211\u4eec\u7684\u5b57\u4f53\u914d\u7f6e\u9009\u9879\u5c31\u5927\u5927\u4e30\u5bcc\u4e86\uff0c\u4f53\u9a8c\u4e5f\u5c31\u66f4\u8fdb\u4e00\u6b65\u4e86\u3002<\/p>\n
\"\u53ef\u4ee5\u5e94\u7528\u7684\u573a\u666f\u793a\u610f\"<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u9009\u62e9\u5408\u9002\u7684\u5b57\u4f53\u8fdb\u884c\u9605\u8bfbdemo<\/a><\/p>\n
\u4f8b\u5982\uff0c\u5728\u6211\u81ea\u5df1windows\u53f0\u5f0f\u673a\u4e0a\uff0c\u663e\u793a\u4e86\u5982\u4e0b\u56fe\u6240\u793a\u7684\u5b57\u4f53\u5217\u8868\uff0c\u8fd9\u4e9b\u5b57\u4f53\u5168\u90e8\u90fd\u662f\u53ef\u4ee5\u6b63\u5e38\u6e32\u67d3\u7684\uff1a<\/p>\n
\"\u652f\u6301\u7684\u4e2d\u6587\u5b57\u4f53\u5217\u8868\"<\/p>\n
\u4f8b\u5982\uff0c\u6211\u9009\u62e9\u4e00\u4e2a\u534e\u6587\u5f69\u4e91\uff0c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n
\"\u8bbe\u7f6e\u534e\u6587\u5f69\u4e91\u5b57\u4f53\u540e\u7684\u6548\u679c\"<\/p>\n
\u4e09\u3001\u7ed3\u675f\u8bed<\/h3>\n
\u7ecf\u8fc7\u81ea\u5df1\u7684\u7b80\u5355\u6d4b\u8bd5\uff0c\u5728\u79fb\u52a8\u7aef\u4e0a\u6548\u679c\u4e5f\u662f\u53ef\u4ee5\u7684\uff0cAndroid\u672a\u6d4b\u3002\u7531\u4e8e\u6b64\u65b9\u6cd5\u662f\u81ea\u5df1\u7a81\u7136\u60f3\u5230\u7684\uff0c\u76ee\u524d\u5c1a\u672a\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u8fdb\u884c\u8fc7\u5b9e\u8df5\uff0c\u6545\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u767e\u5206\u767e\u51c6\u786e\uff0c\u4e4b\u540e\u4f1a\u8fdb\u4e00\u6b65\u53ca\u65f6\u66f4\u65b0\u4fe1\u606f\uff0c\u4e5f\u6b22\u8fce\u53cd\u9988\u5404\u7c7b\u4f7f\u7528\u95ee\u9898\u3002<\/p>\n
\u597d\uff0c\u5c31\u8fd9\u4e9b\uff0c\u5e0c\u671b\u672c\u6587\u7684\u5185\u5bb9\u80fd\u591f\u5bf9\u60a8\u7684\u5de5\u4f5c\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
\u611f\u8c22\u9605\u8bfb\uff01<\/p>\n
<\/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=7387<\/a><\/p>\n
\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e0b\u5348\u7a81\u53d1\u7075\u611f\uff0c\u5199\u4e86\u4e00\u6bb5JavaScript\u5c0f\u811a\u672c\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u7528\u6237\u7684\u64cd\u4f5c\u7cfb\u7edf\u662f\u5426\u5b89\u88c5\u4e86\u67d0\u5b57\u4f53\uff0c\u4ee3\u7801\u975e\u5e38\u7b80\u5355\uff0c\u4f7f\u7528\u4e5f\u975e\u5e38\u65b9\u4fbf\uff0c\u6027\u80fd\u4e5f\u6bd4\u8f83\u5feb\uff0c\u517c\u5bb9\u6027\u4e5f\u975e\u5e38\u597d\uff0c\u5728\u4e00\u4e9b\u7279\u6b8a\u7684\u4ea4\u4e92\u573a\u666f\u975e\u5e38\u6709\u7528\u3002\u603b\u4e4b\uff0c\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":[180],"tags":[53,1191,888,418,258],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/7387"}],"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=7387"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/7387\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=7387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=7387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=7387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}