{"id":4935,"date":"2016-03-30T11:46:32","date_gmt":"2016-03-30T03:46:32","guid":{"rendered":"https:\/\/sdeno.com\/?p=4935"},"modified":"2016-03-30T11:49:15","modified_gmt":"2016-03-30T03:49:15","slug":"2extend%e6%8f%92%e4%bb%b6%e6%89%a9%e5%b1%95","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=4935","title":{"rendered":"2,extend()\u63d2\u4ef6\u6269\u5c55"},"content":{"rendered":"<pre>\/*extend()\u63d2\u4ef6\u6269\u5c55*\/\r\n jQuery.extend = jQuery.fn.extend = function() {\r\n    var src, copyIsArray, copy, name, options, clone,\r\n        target = arguments[0] || {}, \/\/\u83b7\u53d6\u7b2c\u4e00\u4e2a\u53c2\u6570\u8d4b\u503c\u7ed9target\r\n        i = 1,\r\n        length = arguments.length,\r\n        deep = false;\r\n\r\n        \/\/\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u5e03\u5c14\u503c\u65f6\u540c\u65f6\u4e5f\u662f\u4e3atrue\u65f6\uff1a \u6267\u884c\u8fd9\u6b65\u65f6 i=2\r\n        if (typeof target === \"boolean\") {\r\n            deep = target; \/\/\u5c06\u5e03\u5c14\u503c\u7684\u7ed3\u679c \u8d4b\u503c\u7ed9 deep\u53d8\u91cf\r\n            target = arguments[1] || {}; \/\/\u5728\u5c06\u7b2c\u4e8c\u4e2a\u53c2\u6570\u91cd\u65b0\u8d4b\u503c\u7ed9target\u53d8\u91cf\r\n            i = 2;\r\n        }\r\n\r\n        \/\/\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e0d\u662f\u5e03\u5c14\u503c\uff0c\u7ee7\u7eed\u5f80\u4e0b\u770b\r\n\r\n\r\n\r\n        \/\/\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e0d\u662fobject\u7c7b\u578b\u5e76\u4e14\u4e5f\u4e0d\u662ffunction\u7c7b\u578b\u65f6\uff1a \u6267\u884c\u8fd9\u6b65\u65f6 i=1\r\n         if (typeof target !== \"object\" &amp;&amp; !jQuery.isFunction(target)) { \/\/\u6267\u884c\u4ee5\u4e0b\u4ee3\u7801\r\n           target = {}; \/\/\u90a3\u4e48\u5c31\u5c06\u70b9\u4e00\u4e2a\u53c2\u6570\u8bbe\u7f6e\u4e3a\u7a7a\u5bf9\u8c61\r\n         }\r\n\r\n\r\n\r\n        \/\/\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u5e76\u4e14\u662f\u5bf9\u8c61\u6216\u8005\u51fd\u6570\u7c7b\u578b\uff1a \u6267\u884c\u8fd9\u6b65\u65f6 i=0\r\n         if (length === i) { \/\/\u5224\u65ad\u63a5\u53d7\u53c2\u6570\u7684\u6570\u91cf\r\n          target = this; \/\/\u628ajQuery\u5bf9\u8c61\u8d4b\u503c\u7ed9target\r\n          --i;\r\n         }\r\n\r\n        \/\/ \u53ef\u4ee5\u4f20\u5165\u591a\u4e2a\u590d\u5236\u6e90\r\n        \/\/ i \u662f\u4ece 1\u62162\r\n        \/\/ \u4f20\u5165\u5e03\u5c14\u503c\u65f6(\u4e00\u822c\u4e3atrue\uff0c\u4e0d\u4f20\u65f6\u9ed8\u8ba4\u5df2\u7ecf\u662ffalse\u4e86) \u8fd8\u5b9a\u4e49\u4e86\u76ee\u6807\u5bf9\u8c61 i=2\r\n        for (; i &lt; length; i++) {\r\n          \/\/ Only deal with non-null\/undefined values\r\n          \/\/ \u5c06\u6bcf\u4e2a\u6e90\u7684\u5c5e\u6027\u5168\u90e8\u590d\u5236\u5230 target \u4e0a\r\n\r\n           if ((options = arguments[i]) != null) {\r\n              \/\/ Extend the base object\r\n              for (name in options) {\r\n              \/\/ src \u662f\u6e90\uff08\u5373\u672c\u8eab\uff09\u7684\u503c\r\n              \/\/ copy \u662f\u5373\u5c06\u8981\u590d\u5236\u8fc7\u53bb\u7684\u503c\r\n                src = target[name];\r\n                copy = options[name];\r\n\r\n              \/\/ Prevent never-ending loop\r\n               \/\/ \u9632\u6b62\u6709\u73af\uff0c\u4f8b\u5982 extend(true, target, {'target':target});\r\n             if (target === copy) {\r\n                continue;\r\n             }\r\n\r\n           \/\/ Recurse if we're merging plain objects or arrays\r\n            \/\/ \u8fd9\u91cc\u662f\u9012\u5f52\u8c03\u7528\uff0c\u6700\u7ec8\u90fd\u4f1a\u5230\u4e0b\u9762\u7684 else if \u5206\u652f\r\n            \/\/ jQuery.isPlainObject \u7528\u4e8e\u6d4b\u8bd5\u662f\u5426\u4e3a\u7eaf\u7cb9\u7684\u5bf9\u8c61\r\n            \/\/ \u7eaf\u7cb9\u7684\u5bf9\u8c61\u6307\u7684\u662f \u901a\u8fc7 \"{}\" \u6216\u8005 \"new Object\" \u521b\u5efa\u7684\r\n            \/\/ \u5982\u679c\u662f\u6df1\u590d\u5236\r\n           if (deep &amp;&amp; copy &amp;&amp; (jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)))) {\r\n             \/\/ \u6570\u7ec4\r\n             if (copyIsArray) {\r\n                copyIsArray = false;\r\n                clone = src &amp;&amp; jQuery.isArray(src) ? src : [];\r\n\r\n                \/\/ \u5bf9\u8c61\r\n              } else {\r\n                clone = src &amp;&amp; jQuery.isPlainObject(src) ? src : {};\r\n              }\r\n\r\n                  \/\/ Never move original objects, clone them\r\n                 \/\/ \u9012\u5f52\r\n                target[name] = jQuery.extend(deep, clone, copy);\r\n\r\n              \/\/ Don't bring in undefined values\r\n              \/\/ \u6700\u7ec8\u90fd\u4f1a\u5230\u8fd9\u6761\u5206\u652f\r\n             \/\/ \u7b80\u5355\u7684\u503c\u8986\u76d6\r\n             } else if (copy !== undefined) {\r\n               target[name] = copy;\r\n             }\r\n           }\r\n       }\r\n   }\r\n\r\n \/\/ Return the modified object\r\n \/\/ \u8fd4\u56de\u65b0\u7684 target\r\n \/\/ \u5982\u679c i &lt; length \uff0c\u662f\u76f4\u63a5\u8fd4\u56de\u6ca1\u7ecf\u8fc7\u5904\u7406\u7684 target\uff0c\u4e5f\u5c31\u662f arguments[0]\r\n \/\/ \u4e5f\u5c31\u662f\u5982\u679c\u4e0d\u4f20\u9700\u8981\u8986\u76d6\u7684\u6e90\uff0c\u8c03\u7528 $.extend \u5176\u5b9e\u662f\u589e\u52a0 jQuery \u7684\u9759\u6001\u65b9\u6cd5\r\n   return target;\r\n }; \/\/13<\/pre>\n<p><a href=\"https:\/\/sdeno.com\/wp-content\/uploads\/2016\/03\/extend.txt\">extend<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\/*extend()\u63d2\u4ef6\u6269\u5c55*\/ jQuery.extend = jQuery.fn.extend = fun [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-4935","post","type-post","status-publish","format-standard","hentry","category-jquery"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/4935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4935"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/4935\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}