{"id":776,"date":"2010-11-11T23:54:25","date_gmt":"2010-11-11T15:54:25","guid":{"rendered":"http:\/\/leegorous.net\/blog\/?p=776"},"modified":"2012-03-03T19:31:57","modified_gmt":"2012-03-03T11:31:57","slug":"tostring-in-ie","status":"publish","type":"post","link":"http:\/\/leegorous.net\/blog\/2010\/11\/11\/tostring-in-ie\/","title":{"rendered":"IE \u4e2d\u5bf9 toString \u7684\u53cc\u91cd\u6807\u51c6"},"content":{"rendered":"<p>\u4f7f\u7528 for .. in \u904d\u5386\u5bf9\u8c61\uff0c\u4f3c\u4e4e\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\uff0c\u4e0d\u8fc7\u8fd8\u662f\u6709\u4f8b\u5916\u3002\u5728\u5404\u4e2a\u6d4f\u89c8\u5668\u91cc\u9762\u8dd1\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\nvar obj = {\r\n    toString: function() {\r\n        return &quot;custom.toString()&quot;;\r\n    }\r\n}\r\nfor(var i in obj) {\r\n    alert(i);\r\n}\r\n<\/pre>\n<p>\u5b83\u4eec\u90fd\u4f1a alert \u4e00\u4e2a toString\uff0c\u9664\u4e86 IE\u3002\u4e00\u5f00\u59cb\u8fd8\u4ee5\u4e3a\u662f\u52a0\u8f7d\u6162\uff0c\u540e\u6765\u624d\u8ba4\u8bc6\u5230\uff0c\u5176\u5b9e IE \u5e76\u4e0d\u628a\u5b83\u5f53\u6210\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u5bf9\u8c61\u65b9\u6cd5\u3002\u540c\u6837\u7684\u60c5\u51b5\u4e5f\u53d1\u751f\u5728 valueOf() \u65b9\u6cd5\u4e0a\uff0c\u53ef\u4ee5\u731c\u60f3\uff0cIE \u53ef\u80fd\u628a\u5b83\u5f53\u6210\u662f native \u7684\u4e86\u3002<br \/>\n\u5728 <a href=\"http:\/\/webreflection.blogspot.com\/2007\/07\/quick-fix-internet-explorer-and.html\" target=\"_blank\">Quick Fix &#8211; Internet Explorer and toString problems<\/a> \u91cc\u9762\uff0c\u4ecb\u7ecd\u4e86\u4f7f\u7528\u6761\u4ef6\u6ce8\u91ca\uff08conditional comment\uff09\u7684\u65b9\u6cd5\u6765\u89e3\u51b3\u3002<!--more--><\/p>\n<pre name=\"code\" class=\"brush: js\">\r\n\/*@cc_on\r\nif(obj.toString!==Object.prototype.toString){\r\n    \/\/ doStuff\r\n}\r\nif(obj.valueOf!==Object.prototype.valueOf){\r\n    \/\/ doStuff\r\n}\r\n@*\/\r\n<\/pre>\n<p>\u4f46\u662f\uff0cIE \u5c31\u771f\u7684\u628a\u5b83\u5f53\u6210\u4e86 native \u7684\u4e86\u5417\uff1f<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\nobj.hasOwnProperty(&quot;toString&quot;); \/\/ === true\r\n<\/pre>\n<p>\u901a\u8fc7 hasOwnProperty\uff0c\u5b83\u4f3c\u4e4e\u53c8\u662f\u77e5\u9053 toString \u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5c5e\u6027\u3002\u90a3\u4e48\uff0c\u60c5\u51b5\u5c31\u53d8\u5f97\u66f4\u52a0\u602a\u5f02\u4e86\uff0c\u53ea\u80fd\u8bf4 IE \u5728\u4e24\u79cd\u60c5\u51b5\u4e0b\u5904\u7406\u7684\u4f9d\u636e\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u53c8\u6216\u8005\u8bf4\u8fd9\u5c31\u662f\u4e00\u4e2a bug\u3002<br \/>\n\u8981\u5904\u7406\u8fd9\u4e2a\u4f8b\u5916\uff0c\u9664\u4e86\u4f7f\u7528\u6761\u4ef6\u6ce8\u91ca\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u65b9\u5f0f\uff1a<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\nif ($.browser.msie) {\r\n    if (obj.hasOwnProperty(&quot;toString&quot;)) {\r\n        \/\/ do have a toString\r\n    }\r\n    if (obj.hasOwnProperty(&quot;valueOf&quot;)) {\r\n        \/\/ do have a valueOf\r\n    }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528 for .. in \u904d\u5386\u5bf9\u8c61\uff0c\u4f3c\u4e4e\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\uff0c\u4e0d\u8fc7\u8fd8\u662f\u6709\u4f8b\u5916\u3002\u5728\u5404\u4e2a\u6d4f\u89c8\u5668\u91cc\u9762\u8dd1\u4e0b\u9762\u7684\u4ee3\u7801\uff1a var  &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/leegorous.net\/blog\/2010\/11\/11\/tostring-in-ie\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cIE \u4e2d\u5bf9 toString \u7684\u53cc\u91cd\u6807\u51c6\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,17],"tags":[62,9],"_links":{"self":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/776"}],"collection":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/comments?post=776"}],"version-history":[{"count":7,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/776\/revisions"}],"predecessor-version":[{"id":1062,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/776\/revisions\/1062"}],"wp:attachment":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/media?parent=776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/categories?post=776"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/tags?post=776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}