{"id":2261,"date":"2018-08-14T15:11:00","date_gmt":"2018-08-14T07:11:00","guid":{"rendered":"http:\/\/www.imzouyang.com\/blog\/?p=2261"},"modified":"2020-10-28T22:46:47","modified_gmt":"2020-10-28T14:46:47","slug":"js%e8%b6%a3%e7%8e%a9%ef%bc%9ajs%e5%8d%95%e4%be%8b","status":"publish","type":"post","link":"http:\/\/www.imzouyang.com\/blog\/archives\/2261.html","title":{"rendered":"js\u8da3\u73a9\uff1ajs\u5355\u4f8b"},"content":{"rendered":"\n

\u4e00\u3001<\/p>\n\n\n\n

1\u3001\u8ba9\u5168\u5c40\u90fd\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5c31\u662f\u5355\u4f8b\u4e86\u3002\u3002
\u90a3\u4e48 \u8981\u5b9e\u73b0\u5355\u4f8b\uff0c\u80af\u5b9a\u662f\u9700\u8981\u5224\u65ad\u7684\uff0c\u6bcf\u6b21\u5b9e\u4f8b\u5316\u65f6\uff0c\u5c31\u9700\u8981\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u5b9e\u4f8b\u5316\u8fc7\u4e86\uff0c\u5982\u679c true\uff0c\u90a3\u4e48\u5c31\u8fd4\u56de\u4e4b\u524d\u5b9e\u4f8b\u5316\u8fc7\u7684\uff0c\u5c31\u662f\u5355\u4f8b\u4e86\u3002<\/p>\n\n\n\n

2\u3001\u5982\u4f55\u5224\u65ad\u5462\uff0c\u90a3\u6211\u4eec\u5728\u5b9e\u4f8b\u5316\u7684\u65f6\u5019\u80af\u5b9a\u5f97\u6709\u4e00\u4e2a \u5185\u90e8\u7684\u53d8\u91cf \u4f9b\u6211\u4eec\u5224\u65ad\uff0c\u8fd9\u4e2a\u53d8\u91cf\u5b58\u50a8\u7740\u5b9e\u4f8b\u5316\u8fc7\u7684\u7c7b\u3002\u5982\u679c\u8fd9\u4e2a\u53d8\u91cf\u4e3aundefined\uff0c\u5219\u8d70\u5b9e\u4f8b\u5316\u7684\u64cd\u4f5c\uff0c\u5e76\u5c06\u5b9e\u4f8b\u5316\u540e\u7684\u5bf9\u8c61\u8d4b\u503c\u7ed9\u8fd9\u4e2a\u5185\u90e8\u53d8\u91cf\u3002<\/p>\n\n\n\n

function singleObj( fn ){\n    var _ret;\n    return function(){\n        return _ret || ( _ret = fn.apply( this, arguments) );\n    }\n}\n\n\nvar singleBox = singleObj(function(){\n    return {\n        boxName:\"xx\"\n    }\n});\n\nvar singleBox1 = singleBox();\nvar singleBox2 = singleBox();\n\nconsole.log( singleBox1 );\nconsole.log( singleBox2 );\nconsole.log( singleBox1 === singleBox2 ); \/\/true<\/code><\/pre>\n\n\n\n
\u4e8c\u3001\u5f53\u7136\uff0cjs \u5185\u672c\u6765\u5c31\u5177\u5907\u4e00\u79cd\u5f88\u65b9\u4fbf\u7684\u5355\u4f8b\u6a21\u5f0f\uff1a<\/p>\n\n\n\n
\u7528\u5168\u5c40\u53d8\u91cf\u6765\u5b9e\u73b0\uff1a<\/strong>var a = {}; <\/p>\n\n\n\n
\u5f53\u7528\u8fd9\u79cd\u65b9\u5f0f\u521b\u5efa\u5bf9\u8c61 a \u65f6\uff0c\u5bf9\u8c61 a \u786e\u5b9e\u662f\u72ec\u4e00\u65e0\u4e8c\u7684\u3002\u5982\u679c a \u53d8\u91cf\u88ab\u58f0\u660e\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e0b\uff0c\u5219\u6211\u4eec\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u7684\u4efb\u4f55\u4f4d\u7f6e\u4f7f\u7528\u8fd9\u4e2a\u53d8\u91cf\uff0c\u5168\u5c40\u53d8\u91cf\u63d0\u4f9b\u7ed9\u5168\u5c40\u8bbf\u95ee\u662f\u7406\u6240\u5f53\u7136\u7684\u3002\u8fd9\u6837\u5c31\u6ee1\u8db3\u4e86\u5355\u4f8b\u6a21\u5f0f\u7684\u6761\u4ef6\u3002

\u4e3a\u4e86\u907f\u514d\u5168\u5c40\u53d8\u91cf\u9020\u6210\u7684\u6c61\u67d3\uff0c\u53ef\u4ee5\u914d\u5408\u4f7f\u7528 \u547d\u540d\u7a7a\u95f4\u3001\u95ed\u5305\u5c01\u88c5\u79c1\u6709\u53d8\u91cf \u8fd92\u79cd\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
1\uff09\u547d\u540d\u7a7a\u95f4<\/p>\n\n\n\n
var namespace_a = {\n    name:function() {\n      \/\/\u2026\u2026\n    },\n    age:function() {\n      \/\/\u2026\u2026\n    }\n}<\/code><\/pre>\n\n\n\n
name\u3001age \u90fd\u5b9a\u4e49\u4e3a namespace_a \u7684\u5c5e\u6027\uff0c\u51cf\u5c11\u53d8\u91cf\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002<\/p>\n\n\n\n
2\uff09\u95ed\u5305\u5c01\u88c5\u79c1\u6709\u53d8\u91cf\uff1a<\/p>\n\n\n\n
\/\/\u8fd9\u79cd\u65b9\u6cd5\u628a\u4e00\u4e9b\u53d8\u91cf\u5c01\u88c5\u5728\u95ed\u5305\u7684\u5185\u90e8\uff0c\u53ea\u66b4\u9732\u4e00\u4e9b\u63a5\u53e3\u8ddf\u5916\u754c\u901a\u4fe1\uff1a\nvar user = (function(){ \n     var _name = 'Lee'; \n     return { \n         getName: function(){ \n            return _name; \n         } \n     } \n })(); <\/code><\/pre>\n\n\n\n
\u6211\u4eec\u7528\u4e0b\u5212\u7ebf\u6765\u7ea6\u5b9a\u79c1\u6709\u53d8\u91cf__name \u548c__age\uff0c\u5b83\u4eec\u88ab\u5c01\u88c5\u5728\u95ed\u5305\u4ea7\u751f\u7684\u4f5c\u7528\u57df\u4e2d\uff0c\u5916\u90e8\u662f\u8bbf\u95ee\u4e0d\u5230\u8fd9\u4e24\u4e2a\u53d8\u91cf\u7684\uff0c\u8fd9\u5c31\u907f\u514d\u4e86\u5bf9\u5168\u5c40\u7684\u547d\u4ee4\u6c61\u67d3\u3002<\/p>\n\n\n\n
\uff08\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001 1\u3001\u8ba9\u5168\u5c40\u90fd\u53ea\u80fd\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5c31\u662f\u5355\u4f8b\u4e86\u3002\u3002\u90a3\u4e48 \u8981\u5b9e\u73b0\u5355\u4f8b\uff0c\u80af\u5b9a\u662f\u9700\u8981\u5224\u65ad\u7684\uff0c\u6bcf\u6b21\u5b9e\u4f8b\u5316\u65f6\uff0c\u5c31\u9700\u8981\u5224\u65ad\u662f … \u7ee7\u7eed\u9605\u8bfb js\u8da3\u73a9\uff1ajs\u5355\u4f8b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"aside","meta":[],"categories":[30],"tags":[],"_links":{"self":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2261"}],"collection":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/comments?post=2261"}],"version-history":[{"count":3,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2261\/revisions"}],"predecessor-version":[{"id":2268,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2261\/revisions\/2268"}],"wp:attachment":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/media?parent=2261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/categories?post=2261"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/tags?post=2261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}