{"id":3043,"date":"2014-09-15T14:46:35","date_gmt":"2014-09-15T06:46:35","guid":{"rendered":"https:\/\/sdeno.com\/?p=3043"},"modified":"2014-09-15T14:46:35","modified_gmt":"2014-09-15T06:46:35","slug":"%e5%ae%9e%e7%94%a8%e7%9a%847%e4%b8%aajavascript%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=3043","title":{"rendered":"\u5b9e\u7528\u76847\u4e2aJavaScript\u6280\u5de7"},"content":{"rendered":"

\u6211\u5199JavaScript\u4ee3\u7801\u5df2\u7ecf\u5f88\u4e45\u4e86\uff0c\u90fd\u8bb0\u4e0d\u8d77\u662f\u4ec0\u4e48\u5e74\u4ee3\u5f00\u59cb\u7684\u4e86\u3002\u5bf9\u4e8eJavaScript\u8fd9\u79cd\u8bed\u8a00\u8fd1\u51e0\u5e74\u6240\u53d6\u5f97\u7684\u6210\u5c31\uff0c\u6211\u611f\u5230\u975e\u5e38\u7684\u5174\u594b\uff1b\u6211\u5f88\u5e78\u8fd0\u4e5f\u662f\u8fd9\u4e9b\u6210\u5c31\u7684\u83b7\u76ca\u8005\u3002\u6211\u5199\u4e86\u4e0d\u5c11\u7684\u6587\u7ae0\uff0c\u7ae0\u8282\uff0c\u8fd8\u6709\u4e00\u672c\u4e13\u95e8\u8ba8\u8bba\u5b83\u7684\u4e66\uff0c\u7136\u800c\uff0c\u6211\u73b0\u5728\u4f9d\u7136\u80fd\u53d1\u73b0\u4e00\u4e9b\u5173\u4e8e\u8fd9\u79cd\u8bed\u8a00\u7684\u65b0\u77e5\u8bc6\u3002\u4e0b\u9762\u7684\u63cf\u8ff0\u7684\u5c31\u662f\u8fc7\u53bb\u8ba9\u6211\u4e0d\u7531\u5f97\u53d1\u51fa\u201c\u554a\uff01\u201d\u7684\u611f\u53f9\u7684\u7f16\u7a0b\u6280\u5de7\uff0c\u8fd9\u4e9b\u6280\u5de7\u4f60\u5e94\u8be5\u73b0\u5728\u5c31\u8bd5\u8bd5\uff0c\u800c\u4e0d\u662f\u7b49\u7740\u672a\u6765\u7684\u67d0\u4e2a\u65f6\u5019\u5076\u7136\u7684\u53d1\u73b0\u5b83\u4eec\u3002<\/p>\n

\u7b80\u6d01\u5199\u6cd5<\/h3>\n

JavaScript\u91cc\u6211\u6700\u559c\u6b22\u7684\u4e00\u79cd\u4e1c\u897f\u5c31\u662f\u751f\u6210\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u7b80\u5199\u65b9\u6cd5\u3002\u5728\u8fc7\u53bb\uff0c\u5982\u679c\u4f60\u60f3\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f60\u9700\u8981\u8fd9\u6837\uff1a<\/p>\n

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1<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>var<\/span>car<\/span>=<\/span>new<\/span>Object<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>.<\/span>colour<\/span>=<\/span>‘red’<\/span>;<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>.<\/span>wheels<\/span>=<\/span>4<\/span>;<\/span><\/div>\n
4<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>.<\/span>hubcaps<\/span>=<\/span>‘spinning’<\/span>;<\/span><\/div>\n
5<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>.<\/span>age<\/span>=<\/span>4<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4e0b\u9762\u7684\u5199\u6cd5\u80fd\u591f\u8fbe\u5230\u540c\u6837\u7684\u6548\u679c\uff1a<\/p>\n

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1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>car<\/span>=<\/span>{<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>colour<\/span>:<\/span>‘red’<\/span>,<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>wheels<\/span>:<\/span>4<\/span>,<\/span><\/div>\n
4<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>hubcaps<\/span>:<\/span>‘spinning’<\/span>,<\/span><\/div>\n
5<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>age<\/span>:<\/span>4<\/span><\/div>\n
6<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u7b80\u5355\u591a\u4e86\uff0c\u4f60\u4e0d\u9700\u8981\u53cd\u590d\u4f7f\u7528\u8fd9\u4e2a\u5bf9\u8c61\u7684\u540d\u79f0\u3002\u8fd9\u6837 car \u5c31\u5b9a\u4e49\u597d\u4e86\uff0c\u4e5f\u8bb8\u4f60\u4f1a\u9047\u5230 invalidUserInSession \u7684\u95ee\u9898\uff0c\u8fd9\u53ea\u6709\u4f60\u5728\u4f7f\u7528IE\u65f6\u4f1a\u78b0\u5230\uff0c\u53ea\u8981\u8bb0\u4f4f\u4e00\u70b9\uff0c\u4e0d\u8981\u53f3\u5927\u62ec\u53f7\u524d\u9762\u5199\u9017\u53f7\uff0c\u4f60\u5c31\u4e0d\u4f1a\u6709\u9ebb\u70e6\u3002<\/p>\n

\u53e6\u5916\u4e00\u4e2a\u5341\u5206\u65b9\u4fbf\u7684\u7b80\u5199\u662f\u9488\u5bf9\u6570\u7ec4\u7684\u3002\u4f20\u7edf\u7684\u5b9a\u4e49\u6570\u7ec4\u7684\u65b9\u6cd5\u662f\u8fd9\u6837\uff1a<\/p>\n

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1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>moviesThatNeedBetterWriters<\/span>=<\/span>new<\/span>Array<\/span>(<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>‘Transformers’<\/span>,<\/span>‘Transformers2’<\/span>,<\/span>‘Avatar’<\/span>,<\/span>‘IndianaJones 4’<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u7b80\u5199\u7248\u7684\u662f\u8fd9\u6837\uff1a<\/p>\n

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1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>moviesThatNeedBetterWriters<\/span>=<\/span>[<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>‘Transformers’<\/span>,<\/span>‘Transformers2’<\/span>,<\/span>‘Avatar’<\/span>,<\/span>‘IndianaJones 4’<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>]<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5bf9\u4e8e\u6570\u7ec4\uff0c\u8fd9\u91cc\u6709\u4e2a\u95ee\u9898\uff0c\u5176\u5b9e\u6ca1\u6709\u4ec0\u4e48\u56fe\u7ec4\u529f\u80fd\u3002\u4f46\u4f60\u4f1a\u7ecf\u5e38\u53d1\u73b0\u6709\u4eba\u8fd9\u6837\u5b9a\u4e49\u4e0a\u9762\u7684 car \uff0c\u5c31\u50cf\u8fd9\u6837<\/p>\n

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1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>car<\/span>=<\/span>new<\/span>Array<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>[<\/span>‘colour’<\/span>]<\/span>=<\/span>‘red’<\/span>;<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>[<\/span>‘wheels’<\/span>]<\/span>=<\/span>4<\/span>;<\/span><\/div>\n
4<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>[<\/span>‘hubcaps’<\/span>]<\/span>=<\/span>‘spinning’<\/span>;<\/span><\/div>\n
5<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>car<\/span>[<\/span>‘age’<\/span>]<\/span>=<\/span>4<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6570\u7ec4\u4e0d\u662f\u4e07\u80fd\u7684\uff1b\u8fd9\u6837\u5199\u4e0d\u5bf9\uff0c\u4f1a\u8ba9\u4eba\u56f0\u60d1\u3002\u56fe\u7ec4\u5b9e\u9645\u4e0a\u662f\u5bf9\u8c61\u7684\u529f\u80fd\uff0c\u4eba\u4eec\u6df7\u6dc6\u4e86\u8fd9\u4e24\u4e2a\u6982\u5ff5\u3002<\/p>\n

\u53e6\u5916\u4e00\u4e2a\u975e\u5e38\u9177\u7684\u7b80\u5199\u65b9\u6cd5\u662f\u4f7f\u7528\u4e0e\u4e09\u5143\u6761\u4ef6\u7b26\u53f7\u3002\u4f60\u4e0d\u5fc5\u5199\u6210\u4e0b\u9762\u7684\u6837\u5b50\u2026<\/p>\n

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1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>direction<\/span>;<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>if<\/span>(<\/span>x<\/span>&<\/span>lt<\/span>;<\/span>200<\/span>)<\/span>{<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>direction<\/span>=<\/span>1<\/span>;<\/span><\/div>\n
4<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>else<\/span>{<\/span><\/div>\n
5<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>direction<\/span>=<\/span>–<\/span>1<\/span>;<\/span><\/div>\n
6<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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\u2026
\n\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e09\u5143\u6761\u4ef6\u7b26\u53f7\u7b80\u5316\u5b83\uff1a<\/p>\n

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1<\/span>var<\/span>direction<\/span>=<\/span>x<\/span><<\/span>200<\/span>?<\/span>1<\/span>:<\/span>–<\/span>1<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5f53\u6761\u4ef6\u4e3atrue \u65f6\u53d6\u95ee\u53f7\u540e\u9762\u7684\u503c\uff0c\u5426\u5219\u53d6\u5192\u53f7\u540e\u9762\u7684\u503c\u3002<\/p>\n

\u7528 JSON \u5f62\u5f0f\u5b58\u50a8\u6570\u636e<\/strong><\/p>\n

\u5728\u6211\u53d1\u73b0JSON\u4e4b\u524d\uff0c\u6211\u4f7f\u7528\u5404\u79cd\u75af\u72c2\u7684\u65b9\u6cd5\u628a\u6570\u636e\u5b58\u8d2e\u5728JavaScript\u56fa\u6709\u7684\u6570\u636e\u7c7b\u578b\u91cc\u9762\uff0c\u4f8b\u5982\uff1a\u6570\u7ec4\uff0c\u5b57\u7b26\u4e32\uff0c\u4e2d\u95f4\u5939\u6742\u7740\u5bb9\u6613\u8fdb\u884c\u62c6\u5206\u7684\u6807\u5fd7\u7b26\u53f7\u4ee5\u53ca\u5176\u5b83\u7684\u4ee4\u4eba\u8ba8\u538c\u7684\u4e1c\u897f\u3002Douglas Crockford \u53d1\u660e\u4e86JSON \u4e4b\u540e\uff0c\u4e00\u5207\u5168\u53d8\u4e86\u3002\u4f7f\u7528JSON\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528JavaScript\u81ea\u6709\u529f\u80fd\u628a\u6570\u636e\u5b58\u8d2e\u6210\u590d\u6742\u7684\u683c\u5f0f\uff0c\u800c\u4e14\u4e0d\u9700\u8981\u518d\u505a\u5176\u5b83\u7684\u989d\u5916\u8f6c\u6362\uff0c\u76f4\u63a5\u53ef\u4ee5\u8bbf\u95ee\u4f7f\u7528\u3002JSON \u662f \u201cJavaScript Object Notation\u201d \u7684\u7f29\u5199\uff0c\u5b83\u7528\u5230\u4e86\u4e0a\u9762\u63d0\u5230\u7684\u4e24\u79cd\u7b80\u5199\u65b9\u6cd5\u3002\u4e8e\u662f\uff0c\u5982\u679c\u4f60\u60f3\u63cf\u8ff0\u4e00\u4e2a\u4e50\u961f\uff0c\u4f60\u53ef\u80fd\u4f1a\u50cf\u8fd9\u6837\u5199\uff1a<\/p>\n

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01<\/span>var<\/span>band<\/span>=<\/span>{<\/span><\/div>\n
02<\/span>“name”<\/span>:<\/span>“The Red Hot Chili Peppers”<\/span>,<\/span><\/div>\n
03<\/span>“members”<\/span>:<\/span>[<\/span><\/div>\n
04<\/span>{<\/span><\/div>\n
05<\/span>“name”<\/span>:<\/span>“Anthony Kiedis”<\/span>,<\/span><\/div>\n
06<\/span>“role”<\/span>:<\/span>“lead vocals”<\/span><\/div>\n
07<\/span>}<\/span>,<\/span><\/div>\n
08<\/span>{<\/span><\/div>\n
09<\/span>“name”<\/span>:<\/span>“Michael ‘Flea’ Balzary”<\/span>,<\/span><\/div>\n
10<\/span>“role”<\/span>:<\/span>“bass guitar, trumpet, backing vocals”<\/span><\/div>\n
11<\/span>}<\/span>,<\/span><\/div>\n
12<\/span>{<\/span><\/div>\n
13<\/span>“name”<\/span>:<\/span>“Chad Smith”<\/span>,<\/span><\/div>\n
14<\/span>“role”<\/span>:<\/span>“drums,percussion”<\/span><\/div>\n
15<\/span>}<\/span>,<\/span><\/div>\n
16<\/span>{<\/span><\/div>\n
17<\/span>“name”<\/span>:<\/span>“John Frusciante”<\/span>,<\/span><\/div>\n
18<\/span>“role”<\/span>:<\/span>“Lead Guitar”<\/span><\/div>\n
19<\/span>}<\/span><\/div>\n
20<\/span>]<\/span>,<\/span><\/div>\n
21<\/span>“year”<\/span>:<\/span>“2009”<\/span><\/div>\n
22<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4f60\u53ef\u4ee5\u5728JavaScript\u91cc\u76f4\u63a5\u4f7f\u7528JSON\uff0c\u53ef\u4ee5\u628a\u5b83\u5c01\u88c5\u5728\u51fd\u6570\u91cc\uff0c\u751a\u81f3\u4f5c\u4e3a\u4e00\u4e2aAPI\u7684\u8fd4\u56de\u503c\u5f62\u5f0f\u3002\u6211\u4eec\u628a\u8fd9\u79f0\u4f5c JSON-P \uff0c\u5f88\u591a\u7684API\u90fd\u4f7f\u7528\u8fd9\u79cd\u5f62\u5f0f\u3002
\n\u4f60\u53ef\u4ee5\u8c03\u7528\u4e00\u4e2a\u6570\u636e\u63d0\u4f9b\u6e90\uff0c\u5728script\u4ee3\u7801\u91cc\u76f4\u63a5\u8fd4\u56de JSON-P \u6570\u636e\uff1a<\/p>\n

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01<\/span><\/div>\n
<<\/span>div <\/span>id<\/span>=<\/span>“delicious”<\/span>><\/span><<\/span>\/<\/span>div<\/span>><\/span><\/div>\n
<script <\/span>type<\/span>=<\/span>“text\/javascript”<\/span>><\/span>\/\/ <![CDATA[<\/span><\/div>\n
02<\/span>function<\/span>delicious<\/span>(<\/span>o<\/span>)<\/span>{<\/span><\/div>\n
03<\/span>var<\/span>out<\/span>=<\/span>‘<\/span><\/div>\n
<ul>’<\/span>;<\/span><\/div>\n
04<\/span>for<\/span>(<\/span>var<\/span>i<\/span>=<\/span>0<\/span>;<\/span>i<\/span><<\/span>o<\/span>.<\/span>length<\/span>;<\/span>i<\/span>++<\/span>)<\/span>{<\/span><\/div>\n
05<\/span>out<\/span>+<\/span>=<\/span>‘<\/span><\/div>\n
<li><a href=”‘<\/span>+<\/span>o<\/span>[<\/span>i<\/span>]<\/span>.<\/span>u<\/span>+<\/span>‘”>’<\/span>+<\/span><\/div>\n
06<\/span>o<\/span>[<\/span>i<\/span>]<\/span>.<\/span>d<\/span>+<\/span>‘<\/a><\/li><\/span><\/div>\n
<\/div>\n
‘<\/span>;<\/span><\/div>\n
07<\/span>}<\/span><\/div>\n
08<\/span>out<\/span>+<\/span>=<\/span>‘<\/ul><\/span><\/div>\n
<\/div>\n
‘<\/span>;<\/span><\/div>\n
09<\/span>document<\/span>.<\/span>getElementById<\/span>(<\/span>‘delicious’<\/span>)<\/span>.<\/span>innerHTML<\/span>=<\/span>out<\/span>;<\/span><\/div>\n
10<\/span>}<\/span><\/div>\n
11<\/span><\/div>\n
\/\/ ]]><\/script><\/span><\/div>\n
12<\/span><script <\/span>type<\/span>=<\/span>“text\/javascript”<\/span>src<\/span>=<\/span>“http:\/\/feeds.delicious.com\/v2\/json\/codepo8\/javascript?count=15&amp;callback=delicious”<\/span>><\/span><\/script><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u662f\u8c03\u7528 Delicious \u7f51\u7ad9\u63d0\u4f9b\u7684 Web service \u529f\u80fd\uff0c\u83b7\u5f97JSON\u683c\u5f0f\u7684\u6700\u8fd1\u7684\u65e0\u5e8f\u4e66\u7b7e\u5217\u8868\u3002
\n<\/span>
\n\u57fa\u672c\u4e0a\uff0cJSON\u662f\u6700\u8f7b\u4fbf\u7684\u63cf\u8ff0\u590d\u6742\u6570\u636e\u7ed3\u6784\u7684\u65b9\u6cd5\uff0c\u800c\u4e14\u5b83\u80fd\u5728\u6d4f\u89c8\u5668\u91cc\u8fd0\u884c\u3002\u4f60\u751a\u81f3\u53ef\u4ee5\u5728PHP\u91cc\u7528 json_decode() \u51fd\u6570\u6765\u8fd0\u884c\u5b83\u3002JavaScript\u7684\u81ea\u5e26\u51fd\u6570(Math, Array \u548c String)\u8ba9\u6211\u611f\u5230\u60ca\u5947\u7684\u4e00\u4e2a\u4e8b\u60c5\u662f\uff0c\u5f53\u6211\u7814\u7a76\u4e86JavaScript\u91cc\u7684math\u548cString\u51fd\u6570\u540e\uff0c\u53d1\u73b0\u5b83\u4eec\u80fd\u6781\u5927\u7684\u7b80\u5316\u6211\u7684\u7f16\u7a0b\u52b3\u52a8\u3002\u4f7f\u7528\u5b83\u4eec\uff0c\u4f60\u53ef\u4ee5\u7701\u53bb\u590d\u6742\u7684\u5faa\u73af\u5904\u7406\u548c\u6761\u4ef6\u5224\u65ad\u3002\u4f8b\u5982\uff0c\u5f53\u6211\u9700\u8981\u5b9e\u73b0\u4e00\u4e2a\u529f\u80fd\uff0c\u627e\u51fa\u6570\u5b57\u6570\u7ec4\u91cc\u6700\u5927\u7684\u4e00\u4e2a\u6570\u65f6\uff0c\u6211\u8fc7\u53bb\u662f\u8fd9\u6837\u5199\u51fa\u8fd9\u4e2a\u5faa\u73af\u7684\uff0c\u5c31\u50cf\u4e0b\u9762\uff1a<\/p>\n

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1<\/div>\n
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4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span>var<\/span>numbers<\/span>=<\/span>[<\/span>3<\/span>,<\/span>342<\/span>,<\/span>23<\/span>,<\/span>22<\/span>,<\/span>124<\/span>]<\/span>;<\/span><\/div>\n
2<\/span>var<\/span>max<\/span>=<\/span>0<\/span>;<\/span><\/div>\n
3<\/span>for<\/span>(<\/span>var<\/span>i<\/span>=<\/span>0<\/span>;<\/span>i<\/span><<\/span>numbers<\/span>.<\/span>length<\/span>;<\/span>i<\/span>++<\/span>)<\/span>{<\/span>4<\/span>=<\/span>“”<\/span>if<\/span>(<\/span>numbers<\/span>[<\/span>i<\/span>]<\/span>=<\/span>“”<\/span>><\/span>max<\/span>)<\/span>{<\/span><\/div>\n
5<\/span>max<\/span>=<\/span>numbers<\/span>[<\/span>i<\/span>]<\/span>;<\/span><\/div>\n
6<\/span>}<\/span><\/div>\n
7<\/span>}<\/span><\/div>\n
8<\/span>alert<\/span>(<\/span>max<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6211\u4eec\u4e0d\u7528\u5faa\u73af\u4e5f\u80fd\u5b9e\u73b0\uff1a<\/p>\n

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1<\/div>\n
2<\/div>\n
3<\/div>\n<\/div>\n<\/td>\n
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1<\/span>var<\/span>numbers<\/span>=<\/span>[<\/span>3<\/span>,<\/span>342<\/span>,<\/span>23<\/span>,<\/span>22<\/span>,<\/span>124<\/span>]<\/span>;<\/span><\/div>\n
2<\/span>numbers<\/span>.<\/span>sort<\/span>(<\/span>function<\/span>(<\/span>a<\/span>,<\/span>b<\/span>)<\/span>{<\/span>return<\/span>b<\/span>–<\/span>a<\/span>}<\/span>)<\/span>;<\/span><\/div>\n
3<\/span>alert<\/span>(<\/span>numbers<\/span>[<\/span>0<\/span>]<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f60\u4e0d\u80fd\u5bf9\u4e00\u4e2a\u6570\u5b57\u5b57\u7b26\u6570\u7ec4\u8fdb\u884c sort() \uff0c\u56e0\u4e3a\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5b83\u53ea\u4f1a\u6309\u7167\u5b57\u6bcd\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f\u3002\u5982\u679c\u4f60\u60f3\u77e5\u9053\u66f4\u591a\u7684\u7528\u6cd5\uff0c\u53ef\u4ee5\u9605\u8bfb \u8fd9\u7bc7\u4e0d\u9519\u7684\u5173\u4e8e sort() \u7684\u6587\u7ae0\u3002<\/p>\n

\u518d\u6709\u4e00\u4e2a\u6709\u610f\u601d\u7684\u51fd\u6570\u5c31\u662f Math.max()\u3002\u8fd9\u4e2a\u51fd\u6570\u8fd4\u56de\u53c2\u6570\u91cc\u7684\u6570\u5b57\u91cc\u6700\u5927\u7684\u4e00\u4e2a\u6570\u5b57\uff1a<\/p>\n

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\n\n\n\n
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1<\/div>\n<\/div>\n<\/td>\n
\n
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1<\/span>Math<\/span>.<\/span>max<\/span>(<\/span>12<\/span>,<\/span>123<\/span>,<\/span>3<\/span>,<\/span>2<\/span>,<\/span>433<\/span>,<\/span>4<\/span>)<\/span>;<\/span>\/\/ returns 433<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u56e0\u4e3a\u8fd9\u4e2a\u51fd\u6570\u80fd\u591f\u6821\u9a8c\u6570\u5b57\uff0c\u5e76\u8fd4\u56de\u5176\u4e2d\u6700\u5927\u7684\u4e00\u4e2a\uff0c\u6240\u4ee5\u4f60\u53ef\u4ee5\u7528\u5b83\u6765\u6d4b\u8bd5\u6d4f\u89c8\u5668\u5bf9\u67d0\u4e2a\u7279\u6027\u7684\u652f\u6301\u60c5\u51b5\uff1a<\/p>\n

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1<\/span>var<\/span>scrollTop<\/span>=<\/span>Math<\/span>.<\/span>max<\/span>(<\/span><\/div>\n
2<\/span>doc<\/span>.<\/span>documentElement<\/span>.<\/span>scrollTop<\/span>,<\/span><\/div>\n
3<\/span>doc<\/span>.<\/span>body<\/span>.<\/span>scrollTop<\/span><\/div>\n
4<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u4e2a\u662f\u7528\u6765\u89e3\u51b3IE\u95ee\u9898\u7684\u3002\u4f60\u53ef\u4ee5\u83b7\u5f97\u5f53\u524d\u9875\u9762\u7684 scrollTop \u503c\uff0c\u4f46\u662f\u6839\u636e\u9875\u9762\u4e0a DOCTYPE\u7684\u4e0d\u540c\uff0c\u4e0a\u9762\u8fd9\u4e24\u4e2a\u5c5e\u6027\u4e2d\u53ea\u6709\u4e00\u4e2a\u4f1a\u5b58\u653e\u8fd9\u4e2a\u503c\uff0c\u800c\u53e6\u5916\u4e00\u4e2a\u5c5e\u6027\u4f1a\u662f undefined\uff0c\u6240\u4ee5\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 Math.max() \u5f97\u5230\u8fd9\u4e2a\u6570\u3002\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u4f60\u4f1a\u5f97\u5230\u66f4\u591a\u7684\u5173\u4e8e\u4f7f\u7528\u6570\u5b66\u51fd\u6570\u6765\u7b80\u5316JavaScript\u7684\u77e5\u8bc6\u3002<\/p>\n

\u53e6\u5916\u6709\u4e00\u5bf9\u975e\u5e38\u6709\u7528\u7684\u64cd\u4f5c\u5b57\u7b26\u4e32\u7684\u51fd\u6570\u662f split() \u548c join()\u3002\u6211\u60f3\u6700\u6709\u4ee3\u8868\u6027\u7684\u4f8b\u5b50\u5e94\u8be5\u662f\uff0c\u5199\u4e00\u4e2a\u529f\u80fd\uff0c\u7528\u6765\u7ed9\u9875\u9762\u5143\u7d20\u9644\u52a0CSS\u6837\u5f0f\u3002<\/p>\n

\u662f\u8fd9\u6837\u7684\uff0c\u5f53\u4f60\u7ed9\u9875\u9762\u5143\u7d20\u9644\u52a0\u4e00\u4e2aCSS class\u65f6\uff0c\u8981\u4e48\u5b83\u662f\u8fd9\u4e2a\u5143\u7d20\u7684\u7b2c\u4e00\u4e2aCSS class\uff0c\u6216\u8005\u662f\u5b83\u5df2\u7ecf\u6709\u4e86\u4e00\u4e9bclass, \u9700\u8981\u5728\u5df2\u6709\u7684class\u540e\u52a0\u4e0a\u4e00\u4e2a\u7a7a\u683c\uff0c\u7136\u540e\u8ffd\u52a0\u4e0a\u8fd9\u4e2aclass\u3002\u800c\u5f53\u4f60\u8981\u53bb\u6389\u8fd9\u4e2aclass\u65f6\uff0c\u4f60\u4e5f\u9700\u8981\u53bb\u6389\u8fd9\u4e2aclass\u524d\u9762\u7684\u7a7a\u683c(\u8fd9\u4e2a\u5728\u8fc7\u53bb\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u6709\u4e9b\u8001\u7684\u6d4f\u89c8\u5668\u4e0d\u8ba4\u8bc6\u540e\u9762\u8ddf\u7740\u7a7a\u683c\u7684class)\u3002<\/p>\n

\u4e8e\u662f\uff0c\u539f\u59cb\u7684\u5199\u6cd5\u4f1a\u662f\u8fd9\u6837\uff1a<\/p>\n

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4<\/div>\n<\/div>\n<\/td>\n
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1<\/span>function<\/span>addclass<\/span>(<\/span>elm<\/span>,<\/span>newclass<\/span>)<\/span>{<\/span><\/div>\n
2<\/span>var<\/span>c<\/span>=<\/span>elm<\/span>.<\/span>className<\/span>;<\/span><\/div>\n
3<\/span>elm<\/span>.<\/span>className<\/span>=<\/span>(<\/span>c<\/span>===<\/span>”<\/span>)<\/span>?<\/span>newclass<\/span>:<\/span>c<\/span>+<\/span>‘ ‘<\/span>+<\/span>newclass<\/span>;<\/span><\/div>\n
4<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4f60\u53ef\u4ee5\u4f7f\u7528 split() \u548c join() \u51fd\u6570\u81ea\u52a8\u5b8c\u6210\u8fd9\u4e2a\u4efb\u52a1\uff1a<\/p>\n

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1<\/span>function<\/span>addclass<\/span>(<\/span>elm<\/span>,<\/span>newclass<\/span>)<\/span>{<\/span><\/div>\n
2<\/span>var<\/span>classes<\/span>=<\/span>elm<\/span>.<\/span>className<\/span>.<\/span>split<\/span>(<\/span>‘ ‘<\/span>)<\/span>;<\/span><\/div>\n
3<\/span>classes<\/span>.<\/span>push<\/span>(<\/span>newclass<\/span>)<\/span>;<\/span><\/div>\n
4<\/span>elm<\/span>.<\/span>className<\/span>=<\/span>classes<\/span>.<\/span>join<\/span>(<\/span>‘ ‘<\/span>)<\/span>;<\/span><\/div>\n
5<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u4f1a\u786e\u4fdd\u6240\u6709\u7684class\u90fd\u88ab\u7a7a\u683c\u5206\u9694\uff0c\u800c\u4e14\u4f60\u8981\u8ffd\u52a0\u7684class\u6b63\u597d\u653e\u5728\u6700\u540e\u3002<\/p>\n

\u4e8b\u4ef6\u59d4\u6d3e<\/strong><\/p>\n

Web\u5e94\u7528\u90fd\u662f\u7531\u4e8b\u4ef6\u9a71\u52a8\u8fd0\u8f6c\u7684\u3002\u6211\u559c\u6b22\u4e8b\u4ef6\u5904\u7406\uff0c\u5c24\u5176\u559c\u6b22\u81ea\u5df1\u5b9a\u4e49\u4e8b\u4ef6\u3002\u5b83\u80fd\u4f7f\u4f60\u7684\u4ea7\u54c1\u53ef\u6269\u5c55\uff0c\u800c\u4e0d\u7528\u6539\u52a8\u6838\u5fc3\u4ee3\u7801\u3002\u6709\u4e00\u4e2a\u5f88\u5927\u7684\u95ee\u9898\uff08\u4e5f\u53ef\u4ee5\u8bf4\u662f\u529f\u80fd\u5f3a\u5927\u7684\u8868\u73b0\uff09\uff0c\u662f\u5173\u4e8e\u9875\u9762\u4e0a\u4e8b\u4ef6\u7684\u79fb\u9664\u95ee\u9898\u3002\u4f60\u53ef\u4ee5\u5bf9\u67d0\u4e2a\u5143\u7d20\u5b89\u88c5\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u4e8b\u4ef6\u76d1\u542c\u5668\u5c31\u5f00\u59cb\u8fd0\u8f6c\u5de5\u4f5c\u3002\u4f46\u9875\u9762\u4e0a\u6ca1\u6709\u4efb\u4f55\u6307\u793a\u8bf4\u660e\u8fd9\u6709\u4e2a\u76d1\u542c\u5668\u3002\u56e0\u4e3a\u8fd9\u79cd\u4e0d\u53ef\u8868\u73b0\u7684\u95ee\u9898 (\u8fd9\u5c24\u5176\u8ba9\u4e00\u4e9b\u65b0\u624b\u5934\u75bc) \uff0c\u4ee5\u53ca\u50cfIE6\u8fd9\u6837\u7684\u201d\u6d4f\u89c8\u5668\u201c\u5728\u592a\u591a\u7684\u4f7f\u7528\u4e8b\u4ef6\u76d1\u542c\u65f6\u4f1a\u51fa\u73b0\u5404\u79cd\u7684\u5185\u5b58\u95ee\u9898\uff0c\u4f60\u4e0d\u5f97\u4e0d\u627f\u8ba4\u5c3d\u91cf\u5c11\u4f7f\u7528\u4e8b\u4ef6\u7f16\u7a0b\u662f\u4e2a\u660e\u667a\u7684\u505a\u6cd5\u3002<\/p>\n

\u4e8e\u662f \u4e8b\u4ef6\u59d4\u6258 \u5c31\u51fa\u73b0\u4e86\u3002<\/p>\n

\u5f53\u9875\u9762\u4e0a\u67d0\u4e2a\u5143\u7d20\u4e0a\u7684\u4e8b\u4ef6\u89e6\u53d1\u65f6\uff0c\u800c\u5728 DOM \u7ee7\u627f\u5173\u7cfb\u4e0a\uff0c\u8fd9\u4e2a\u5143\u7d20\u7684\u6240\u6709\u5b50\u5143\u7d20\u4e5f\u80fd\u63a5\u6536\u5230\u8fd9\u4e2a\u4e8b\u4ef6\uff0c\u8fd9\u65f6\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5728\u7236\u5143\u7d20\u4e0a\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u6765\u5904\u7406\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u4e00\u5806\u7684\u5404\u4e2a\u5b50\u5143\u7d20\u4e0a\u7684\u4e8b\u4ef6\u76d1\u542c\u5668\u6765\u5904\u7406\u3002\u7a76\u7adf\u662f\u4ec0\u4e48\u610f\u601d\uff1f\u8fd9\u6837\u8bf4\u5427\uff0c\u9875\u9762\u4e0a\u6709\u5f88\u591a\u8d85\u94fe\u63a5\uff0c\u4f60\u4e0d\u60f3\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e9b\u94fe\u63a5\uff0c\u60f3\u901a\u8fc7\u4e00\u4e2a\u51fd\u6570\u6765\u8c03\u7528\u8fd9\u4e2a\u94fe\u63a5\uff0cHTML\u4ee3\u7801\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n

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1<\/span><<\/span>h2<\/span>><\/span>Great <\/span>Web <\/span>resources<\/span><<\/span>\/<\/span>h2<\/span>><\/span><\/div>\n
2<\/span><<\/span>ul <\/span>id<\/span>=<\/span>“resources”<\/span>><\/span><\/div>\n
3<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/opera.com\/wsc”<\/span>><\/span>Opera <\/span>Web <\/span>Standards <\/span>Curriculum<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
4<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/sitepoint.com”<\/span>><\/span>Sitepoint<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
5<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/alistapart.com”<\/span>><\/span>A<\/span>List <\/span>Apart<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
6<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/yuiblog.com”<\/span>><\/span>YUI <\/span>Blog<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
7<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/blameitonthevoices.com”<\/span>><\/span>Blame <\/span>it <\/span>on <\/span>the <\/span>voices<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
8<\/span><<\/span>li<\/span>><\/span><<\/span>a<\/span>href<\/span>=<\/span>“http:\/\/oddlyspecific.com”<\/span>><\/span>Oddly <\/span>specific<\/span><<\/span>\/<\/span>a<\/span>><\/span><<\/span>\/<\/span>li<\/span>><\/span><\/div>\n
9<\/span><<\/span>\/<\/span>ul<\/span>><\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5e38\u89c1\u7684\u505a\u6cd5\u662f\u901a\u8fc7\u5faa\u73af\u8fd9\u4e9b\u94fe\u63a5\uff0c\u5c06\u6bcf\u4e2a\u94fe\u63a5\u4e0a\u9644\u52a0\u4e00\u4e2a\u4e8b\u4ef6\u5904\u7406\u5668\uff1a<\/p>\n

\n
<\/div>\n
<\/div>\n
\n\n\n\n
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1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n<\/div>\n<\/td>\n
\n
\n
01<\/span>\/\/ \u5178\u578b\u7684\u4e8b\u4ef6\u5904\u7406\u4f8b\u5b50<\/span><\/div>\n
02<\/span>(<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
03<\/span>var<\/span>resources<\/span>=<\/span>document<\/span>.<\/span>getElementById<\/span>(<\/span>‘resources’<\/span>)<\/span>;<\/span><\/div>\n
04<\/span>var<\/span>links<\/span>=<\/span>resources<\/span>.<\/span>getElementsByTagName<\/span>(<\/span>‘a’<\/span>)<\/span>;<\/span><\/div>\n
05<\/span>var<\/span>all<\/span>=<\/span>links<\/span>.<\/span>length<\/span>;<\/span><\/div>\n
06<\/span>for<\/span>(<\/span>var<\/span>i<\/span>=<\/span>0<\/span>;<\/span>i<\/span><<\/span>all<\/span>;<\/span>i<\/span>++<\/span>)<\/span>{<\/span><\/div>\n
07<\/span>\/\/ Attach a listener to each link<\/span><\/div>\n
08<\/span>links<\/span>[<\/span>i<\/span>]<\/span>.<\/span>addEventListener<\/span>(<\/span>‘click’<\/span>,<\/span>handler<\/span>,<\/span>false<\/span>)<\/span>;<\/span><\/div>\n
09<\/span>}<\/span>;<\/span><\/div>\n
10<\/span>function<\/span>handler<\/span>(<\/span>e<\/span>)<\/span>{<\/span><\/div>\n
11<\/span>var<\/span>x<\/span>=<\/span>e<\/span>.<\/span>target<\/span>;<\/span>\/\/ Get the link that was clicked<\/span><\/div>\n
12<\/span>alert<\/span>(<\/span>x<\/span>)<\/span>;<\/span><\/div>\n
13<\/span>e<\/span>.<\/span>preventDefault<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
14<\/span>}<\/span>;<\/span><\/div>\n
15<\/span>}<\/span>)<\/span>(<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6211\u4eec\u7528\u4e00\u4e2a\u4e8b\u4ef6\u5904\u7406\u5668\u4e5f\u80fd\u5b8c\u6210\u8fd9\u9879\u4efb\u52a1\uff1a<\/p>\n

\n
<\/div>\n
<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n<\/div>\n<\/td>\n
\n
\n
01<\/span>(<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
02<\/span>var<\/span>resources<\/span>=<\/span>document<\/span>.<\/span>getElementById<\/span>(<\/span>‘resources’<\/span>)<\/span>;<\/span><\/div>\n
03<\/span>resources<\/span>.<\/span>addEventListener<\/span>(<\/span>‘click’<\/span>,<\/span>handler<\/span>,<\/span>false<\/span>)<\/span>;<\/span><\/div>\n
04<\/span>function<\/span>handler<\/span>(<\/span>e<\/span>)<\/span>{<\/span><\/div>\n
05<\/span>var<\/span>x<\/span>=<\/span>e<\/span>.<\/span>target<\/span>;<\/span>\/\/ get the link tha<\/span><\/div>\n
06<\/span>if<\/span>(<\/span>x<\/span>.<\/span>nodeName<\/span>.<\/span>toLowerCase<\/span>(<\/span>)<\/span>===<\/span>‘a’<\/span>)<\/span>{<\/span><\/div>\n
07<\/span>alert<\/span>(<\/span>‘Event delegation:’<\/span>+<\/span>x<\/span>)<\/span>;<\/span><\/div>\n
08<\/span>e<\/span>.<\/span>preventDefault<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
09<\/span>}<\/span><\/div>\n
10<\/span>}<\/span>;<\/span><\/div>\n
11<\/span>}<\/span>)<\/span>(<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\n

\u56e0\u4e3a\u70b9\u51fb\u4e8b\u4ef6\u5c31\u53d1\u751f\u5728\u8fd9\u4e9b\u9875\u9762\u5143\u7d20\u91cc\uff0c\u4f60\u8981\u505a\u7684\u5c31\u662f\u6bd4\u8f83\u5b83\u4eec\u7684 nodeName\uff0c\u627e\u51fa\u5e94\u8be5\u56de\u5e94\u8fd9\u4e2a\u4e8b\u4ef6\u7684\u90a3\u4e2a\u5143\u7d20\u3002<\/p>\n

\u514d\u8d23\u58f0\u660e\uff1a\u4e0a\u9762\u8bf4\u7684\u8fd9\u4e24\u4e2a\u5173\u4e8e\u4e8b\u4ef6\u7684\u4f8b\u5b50\uff0c\u5728\u6240\u6709\u6d4f\u89c8\u5668\u91cc\u90fd\u80fd\u8fd0\u884c\uff0c\u9664\u4e86IE6\uff0c\u5728IE6\u4e0a\u4f60\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u4e8b\u4ef6\u6a21\u578b\uff0c\u800c\u4e0d\u662f\u7b80\u5355\u7684W3C\u7684\u6807\u51c6\u5b9e\u73b0\u3002\u8fd9\u4e5f\u5c31\u662f\u6211\u4eec\u63a8\u8350\u4f7f\u7528\u4e00\u4e9b\u5de5\u5177\u5305\u7684\u539f\u56e0\u3002<\/p>\n

\u8fd9\u79cd\u65b9\u6cd5\u7684\u597d\u5904\u5e76\u4e0d\u662f\u4ec5\u9650\u4e8e\u628a\u591a\u4e2a\u4e8b\u4ef6\u5904\u7406\u5668\u7f29\u51cf\u4e3a\u4e00\u4e2a\u3002\u4f60\u60f3\u60f3\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f60\u9700\u8981\u52a8\u6001\u7684\u5f80\u8fd9\u4e2a\u94fe\u63a5\u8868\u91cc\u8ffd\u52a0\u66f4\u591a\u7684\u94fe\u63a5\u3002\u4f7f\u7528\u4e8b\u4ef6\u59d4\u6258\u540e\uff0c\u4f60\u5c31\u4e0d\u9700\u8981\u505a\u5176\u5b83\u4fee\u6539\u4e86\uff1b\u5426\u5219\u7684\u8bdd\uff0c\u4f60\u9700\u8981\u91cd\u65b0\u5faa\u73af\u8fd9\u4e2a\u94fe\u63a5\u8868\uff0c\u91cd\u65b0\u7ed9\u6bcf\u4e2a\u94fe\u63a5\u5b89\u88c5\u4e8b\u4ef6\u5904\u7406\u5668\u3002<\/p>\n

\u533f\u540d\u51fd\u6570\u548c\u6a21\u5757\u5316<\/h3>\n

\u5728JavaScript\u91cc\u6700\u4ee4\u4eba\u61ca\u607c\u7684\u4e8b\u60c5\u662f\u53d8\u91cf\u6ca1\u6709\u4f7f\u7528\u8303\u56f4\u3002\u4efb\u4f55\u53d8\u91cf\uff0c\u51fd\u6570\uff0c\u6570\u7ec4\uff0c\u5bf9\u8c61\uff0c\u53ea\u8981\u4e0d\u5728\u51fd\u6570\u5185\u90e8\uff0c\u90fd\u88ab\u8ba4\u4e3a\u662f\u5168\u5c40\u7684\uff0c\u8fd9\u5c31\u662f\u8bf4\uff0c\u8fd9\u4e2a\u9875\u9762\u4e0a\u7684\u5176\u5b83\u811a\u672c\u4e5f\u53ef\u4ee5\u8bbf\u95ee\u5b83\uff0c\u800c\u4e14\u53ef\u4ee5\u8986\u76d6\u91cd\u5199\u5b83\u3002<\/p>\n

\u89e3\u51b3\u529e\u6cd5\u662f\uff0c\u628a\u4f60\u7684\u53d8\u91cf\u653e\u5728\u4e00\u4e2a\u533f\u540d\u51fd\u6570\u5185\u90e8\uff0c\u5b9a\u4e49\u5b8c\u4e4b\u540e\u7acb\u5373\u8c03\u7528\u5b83\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u5199\u6cd5\u5c06\u4f1a\u4ea7\u751f\u4e09\u4e2a\u5168\u5c40\u53d8\u91cf\u548c\u4e24\u4e2a\u5168\u5c40\u51fd\u6570\uff1a<\/p>\n

\n
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<\/div>\n
\n\n\n\n
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1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>name<\/span>=<\/span>‘Chris’<\/span>;<\/span><\/div>\n
2<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>age<\/span>=<\/span>’34’<\/span>;<\/span><\/div>\n
3<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>status<\/span>=<\/span>‘single’<\/span>;<\/span><\/div>\n
4<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>createMember<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
5<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
6<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
7<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>getMemberDetails<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
8<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
9<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5982\u679c\u8fd9\u4e2a\u9875\u9762\u4e0a\u7684\u5176\u5b83\u811a\u672c\u91cc\u4e5f\u5b58\u5728\u4e00\u4e2a\u53eb status \u7684\u53d8\u91cf\uff0c\u9ebb\u70e6\u5c31\u4f1a\u51fa\u73b0\u3002\u5982\u679c\u6211\u4eec\u628a\u5b83\u4eec\u5c01\u88c5\u5728\u4e00\u4e2a myApplication \u91cc\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c31\u8fce\u5203\u800c\u89e3\u4e86\uff1a<\/p>\n

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1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n<\/div>\n<\/td>\n
\n
\n
01<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>myApplication<\/span>=<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
02<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>name<\/span>=<\/span>‘Chris’<\/span>;<\/span><\/div>\n
03<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>age<\/span>=<\/span>’34’<\/span>;<\/span><\/div>\n
04<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>status<\/span>=<\/span>‘single’<\/span>;<\/span><\/div>\n
05<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>createMember<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
06<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
07<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
08<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>getMemberDetails<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
09<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
10<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
11<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>(<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4f46\u662f\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u5728\u51fd\u6570\u5916\u9762\u5c31\u6ca1\u6709\u4ec0\u4e48\u529f\u80fd\u4e86\u3002\u5982\u679c\u8fd9\u662f\u4f60\u9700\u8981\u7684\uff0c\u90a3\u5c31\u53ef\u4ee5\u4e86\u3002\u4f60\u8fd8\u53ef\u4ee5\u7701\u53bb\u51fd\u6570\u7684\u540d\u79f0\uff1a<\/p>\n

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1<\/div>\n
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7<\/div>\n
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9<\/div>\n
10<\/div>\n
11<\/div>\n<\/div>\n<\/td>\n
\n
\n
01<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>(<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
02<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>name<\/span>=<\/span>‘Chris’<\/span>;<\/span><\/div>\n
03<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>age<\/span>=<\/span>’34’<\/span>;<\/span><\/div>\n
04<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>status<\/span>=<\/span>‘single’<\/span>;<\/span><\/div>\n
05<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>createMember<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
06<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
07<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
08<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>getMemberDetails<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
09<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
10<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
11<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>)<\/span>(<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u5982\u679c\u4f60\u60f3\u5728\u51fd\u6570\u5916\u9762\u4e5f\u80fd\u4f7f\u7528\u91cc\u9762\u7684\u4e1c\u897f\uff0c\u90a3\u5c31\u8981\u505a\u4e9b\u4fee\u6539\u3002\u4e3a\u4e86\u80fd\u8bbf\u95ee createMember() \u6216 getMemberDetails(),\u4f60\u9700\u8981\u628a\u5b83\u4eec\u53d8\u6210 myApplication\u7684\u5c5e\u6027\uff0c\u4ece\u800c\u628a\u5b83\u4eec\u66b4\u9732\u4e8e\u5916\u90e8\u7684\u4e16\u754c:<\/p>\n

\n
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\n\n\n\n
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1<\/div>\n
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7<\/div>\n
8<\/div>\n
9<\/div>\n
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11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n<\/div>\n<\/td>\n
\n
\n
01<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>myApplication<\/span>=<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
02<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>name<\/span>=<\/span>‘Chris’<\/span>;<\/span><\/div>\n
03<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>age<\/span>=<\/span>’34’<\/span>;<\/span><\/div>\n
04<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>status<\/span>=<\/span>‘single’<\/span>;<\/span><\/div>\n
05<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span>{<\/span><\/div>\n
06<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0<\/span>createMember<\/span>:<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
07<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
08<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>,<\/span><\/div>\n
09<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>getMemberDetails<\/span>:<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
10<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
11<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
12<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
13<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
14<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>\/\/myApplication.createMember() \u548c<\/span><\/div>\n
15<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>\/\/myApplication.getMemberDetails() \u5c31\u53ef\u4ee5\u4f7f\u7528\u4e86\u3002<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u88ab\u79f0\u4f5c module \u6a21\u5f0f\u6216 singleton\u3002Douglas Crockford \u591a\u6b21\u8c08\u5230\u8fc7\u8fd9\u4e9b\uff0cYahoo User Interface Library YUI \u91cc\u5bf9\u6b64\u6709\u5927\u91cf\u7684\u4f7f\u7528\u3002\u4f46\u8fd9\u6837\u4e00\u6765\u8ba9\u6211\u611f\u5230\u4e0d\u4fbf\u7684\u662f\uff0c\u6211\u9700\u8981\u6539\u53d8\u53e5\u5f0f\u6765\u4f7f\u51fd\u6570\u548c\u53d8\u91cf\u80fd\u88ab\u5916\u754c\u8bbf\u95ee\u3002\u66f4\u751a\u8005\uff0c\u8c03\u7528\u65f6\u6211\u8fd8\u9700\u8981\u52a0\u4e0amyApplication \u8fd9\u4e2a\u524d\u7f00\u3002\u6240\u4ee5\uff0c\u6211\u4e0d\u559c\u6b22\u8fd9\u6837\u505a\uff0c\u6211\u66f4\u613f\u610f\u7b80\u5355\u7684\u628a\u9700\u8981\u80fd\u88ab\u5916\u754c\u8bbf\u95ee\u7684\u5143\u7d20\u7684\u6307\u9488\u5bfc\u51fa\u6765\u3002\u8fd9\u6837\u505a\u540e\uff0c\u53cd\u5012\u7b80\u5316\u4e86\u5916\u754c\u8c03\u7528\u7684\u5199\u6cd5\uff1a<\/p>\n

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1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n
16<\/div>\n<\/div>\n<\/td>\n
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01<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>myApplication<\/span>=<\/span>function<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
02<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>name<\/span>=<\/span>‘Chris’<\/span>;<\/span><\/div>\n
03<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>age<\/span>=<\/span>’34’<\/span>;<\/span><\/div>\n
04<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>var<\/span>status<\/span>=<\/span>‘single’<\/span>;<\/span><\/div>\n
05<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>createMember<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
06<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
07<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
08<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>function<\/span>getMemberDetails<\/span>(<\/span>)<\/span>{<\/span><\/div>\n
09<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ […]<\/span><\/div>\n
10<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
11<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span>{<\/span><\/div>\n
12<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>create<\/span>:<\/span>createMember<\/span>,<\/span><\/div>\n
13<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>get<\/span>:<\/span>getMemberDetails<\/span><\/div>\n
14<\/span> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
15<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
16<\/span> \u00a0\u00a0\u00a0\u00a0<\/span>\/\/\u73b0\u5728\u5199\u6210 myApplication.get()\u548c myApplication.create() \u5c31\u884c\u4e86\u3002<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u6211\u628a\u8fd9\u4e2a\u79f0\u4f5c \u201crevealing module pattern.\u201d<\/p>\n

\u53ef\u914d\u7f6e\u5316<\/h3>\n

\u4e00\u65e6\u6211\u628a\u6240\u5199\u7684JavaScript\u4ee3\u7801\u53d1\u5e03\u5230\u8fd9\u4e2a\u4e16\u754c\u4e0a\uff0c\u5c31\u6709\u4eba\u60f3\u6539\u52a8\u5b83\uff0c\u901a\u5e38\u662f\u4eba\u4eec\u60f3\u8ba9\u5b83\u5b8c\u6210\u4e00\u4e9b\u5b83\u672c\u8eab\u5b8c\u6210\u4e0d\u4e86\u7684\u4efb\u52a1\u2014\u4f46\u901a\u5e38\u4e5f\u662f\u6211\u5199\u7684\u7a0b\u5e8f\u4e0d\u591f\u7075\u6d3b\uff0c\u6ca1\u6709\u63d0\u4f9b\u7528\u6237\u53ef\u81ea\u5b9a\u4e49\u7684\u529f\u80fd\u3002\u89e3\u51b3\u529e\u6cd5\u662f\u7ed9\u4f60\u7684\u811a\u672c\u589e\u52a0\u4e00\u4e2a\u914d\u7f6e\u9879\u5bf9\u8c61\u3002\u6211\u66fe\u7ecf\u5199\u8fc7\u4e00\u7bc7\u6df1\u5165\u4ecb\u7ecdJavaScript\u914d\u7f6e\u9879\u5bf9\u8c61\u7684\u6587\u7ae0\uff0c\u4e0b\u9762\u662f\u5176\u4e2d\u7684\u8981\u70b9\uff1a<\/p>\n