{"id":1516,"date":"2016-04-20T17:27:14","date_gmt":"2016-04-20T09:27:14","guid":{"rendered":"http:\/\/www.daliane.com\/?p=1516"},"modified":"2016-04-20T17:27:14","modified_gmt":"2016-04-20T09:27:14","slug":"js_liang_ge_xiao_kuo_hao_de_yong_fa","status":"publish","type":"post","link":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/js_liang_ge_xiao_kuo_hao_de_yong_fa\/","title":{"rendered":"js \u4e24\u4e2a\u5c0f\u62ec\u53f7 ()() \u7684\u7528\u6cd5"},"content":{"rendered":"
    \n
  1. (function()<\/li>\n
  2. \u00a0{<\/li>\n
  3. \u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”);<\/li>\n
  4. \u00a0})();<\/li>\n<\/ol>\n

    \u5176\u5b9e\u8fd9\u6bb5\u4ee3\u7801\u7684\u610f\u601d\u5c31\u662f\u6267\u884c\u8fd9\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u5f39\u51fa\u63d0\u793a\u6846\uff0c\u5185\u5bb9\u4e3a\u201ccftea\u201d\u3002<\/p>\n

    \u53ef\u4ee5\u628a\u4e0a\u8ff0\u4ee3\u7801\u7406\u89e3\u4e3a\uff1a<\/p>\n

      \n
    1. function\u00a0foo()<\/li>\n
    2. \u00a0\u00a0\u00a0{<\/li>\n
    3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(1);<\/li>\n
    4. \u00a0\u00a0\u00a0}<\/li>\n
    5. \u00a0\u00a0\u00a0foo();<\/li>\n<\/ol>\n

      \u5176\u5b9e\u76f8\u540c\u7684\u529f\u80fd\u8fd8\u6709\u53e6\u5916\u4e24\u79cd\u5199\u6cd5\uff0c\u6211\u4eec\u4e00\u5e76\u5217\u51fa\u6765\u5982\u4e0b\uff1a<\/p>\n

       <\/p>\n

        \n
      1. function\u00a0foo()<\/li>\n
      2. \u00a0\u00a0\u00a0\u00a0{<\/li>\n
      3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”);<\/li>\n
      4. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
      5. \u00a0\u00a0\u00a0\u00a0foo();<\/li>\n
      6. <\/li>\n
      7. \u00a0\u00a0\u00a0\u00a0(function()<\/li>\n
      8. \u00a0\u00a0\u00a0\u00a0{<\/li>\n
      9. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”);<\/li>\n
      10. \u00a0\u00a0\u00a0\u00a0})();<\/li>\n
      11. <\/li>\n
      12. \u00a0\u00a0\u00a0\u00a0(function()<\/li>\n
      13. \u00a0\u00a0\u00a0\u00a0{<\/li>\n
      14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”);<\/li>\n
      15. \u00a0\u00a0\u00a0\u00a0}());<\/li>\n
      16. <\/li>\n
      17. \u00a0\u00a0\u00a0\u00a0void\u00a0function()<\/li>\n
      18. \u00a0\u00a0\u00a0\u00a0{<\/li>\n
      19. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”);<\/li>\n
      20. \u00a0\u00a0\u00a0\u00a0}()<\/li>\n<\/ol>\n

         <\/p>\n

        \u7528\u9014<\/p>\n

        \u8bf4\u4e86\u8fd9\u4e48\u591a\uff0c\u8fd9\u4e1c\u897f\u5230\u5e95\u6709\u4ec0\u4e48\u7528\u5462\uff1f\u5b83\u53ef\u4ee5\u7acb\u5373\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\uff0c\u5e76\u628a\u7ed3\u679c\u8d4b\u7ed9\u53d8\u91cf\uff1b\u6253\u7834\u6211\u4eec\u5e38\u89c4\u7684\u5148\u5199\u51fd\u6570\uff0c\u518d\u8c03\u7528\u7684\u6d41\u7a0b\uff0c\u7b80\u5316\u4e66\u5199\u3002<\/p>\n

         <\/p>\n

          \n
        1. ajax.xmlhttp\u00a0=\u00a0(…)();<\/li>\n<\/ol>\n
          \n
            \n
          1. function\u00a0Foo()\u00a0{<\/li>\n
          2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0a\u00a0=\u00a0123;<\/li>\n
          3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.a\u00a0=\u00a0456;<\/li>\n
          4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
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          6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.a);\u00a0\/\/\u00a0undefined<\/li>\n
          7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
          8. \u00a0\u00a0\u00a0}<\/li>\n
          9. \u00a0\u00a0\u00a0var\u00a0f\u00a0=\u00a0new\u00a0Foo();<\/li>\n<\/ol>\n<\/div>\n

            \u4ee5\u4e0a\u4ee3\u7801\uff0c\u5148\u663e\u793a 123\uff0c\u518d\u663e\u793a undefined\uff0c\u8bf4\u660e alert(this.a); \u8fd9\u53e5\u4e2d this \u662f\u6307\u672c function \u7684\uff0c\u800c\u4e0d\u662f\u5176\u5916\u90e8 function \u7684\u3002\u5982\u679c\u8981\u4f7f\u7528\u5916\u90e8\u7684\u6210\u5458\uff0c\u53ef\u4f7f\u7528\u53c2\u6570\u7684\u5f62\u5f0f\u4f20\u5165\uff1a<\/p>\n

             <\/p>\n

            \n
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            2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0a\u00a0=\u00a0123;<\/li>\n
            3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.a\u00a0=\u00a0456;<\/li>\n
            4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function(a)\u00a0{<\/li>\n
            5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(a);\u00a0\/\/\u00a0456<\/li>\n
            6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})(this.a);<\/li>\n
            7. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
            8. \u00a0\u00a0\u00a0\u00a0var\u00a0f\u00a0=\u00a0new\u00a0Foo();<\/li>\n<\/ol>\n<\/div>\n

               <\/p>\n

              \u5f88\u597d\u7406\u89e3\uff0c\u518d\u770b\u770b\u4e0b\u9762\u7684\uff1a<\/p>\n

              \n
                \n
              1. function\u00a0Foo()\u00a0{<\/li>\n
              2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0a\u00a0=\u00a0123;<\/li>\n
              3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.a\u00a0=\u00a0456;<\/li>\n
              4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
              5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(a);\u00a0\/\/\u00a0123<\/li>\n
              6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.a);\u00a0\/\/\u00a0undefined<\/li>\n
              7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.b\u00a0=\u00a0789;<\/li>\n
              8. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
              9. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
              10. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.b);\u00a0\/\/\u00a0789<\/li>\n
              11. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
              12. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
              13. \u00a0\u00a0\u00a0\u00a0var\u00a0f\u00a0=\u00a0new\u00a0Foo();<\/li>\n
              14. \u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
              15. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.b);\u00a0\/\/\u00a0789<\/li>\n
              16. \u00a0\u00a0\u00a0\u00a0})();<\/li>\n<\/ol>\n<\/div>\n

                \u540c\u6837\u662f\u5148\u663e\u793a 123\uff0c\u7136\u540e\u663e\u793a undefined\uff0c\u7136\u540e\u663e\u793a 789\uff0c\u6700\u540e\u53c8\u662f\u4e00\u4e2a 789\u3002\u8fd9\u8bf4\u660e\u7528\u4e24\u4e2a\u5c0f\u62ec\u53f7\u62ec\u8d77\u6765\u7684\u90fd\u662f\u4f4d\u4e8e\u4e00\u4e2a\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u7684\uff0c\u4e0d\u8bba\u8fd9\u4e9b\u4ee3\u7801\u653e\u5728\u54ea\u91cc\u3002<\/p>\n

                 <\/p>\n

                \n
                  \n
                1. function\u00a0Foo()\u00a0{<\/li>\n
                2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
                3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.b\u00a0=\u00a0789;<\/li>\n
                4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
                5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
                6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.b);\u00a0\/\/\u00a0789<\/li>\n
                7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0b\u00a0=\u00a00;<\/li>\n
                8. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(b);\u00a0\/\/\u00a00<\/li>\n
                9. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
                10. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
                11. \u00a0\u00a0\u00a0\u00a0var\u00a0f\u00a0=\u00a0new\u00a0Foo();<\/li>\n
                12. \u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
                13. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.b);\u00a0\/\/\u00a0789<\/li>\n
                14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(b);\u00a0\/\/\u00a0789<\/li>\n
                15. \u00a0\u00a0\u00a0\u00a0})();<\/li>\n<\/ol>\n<\/div>\n

                  \u4ee4\u4eba\u610f\u5916\u7684\u662f\uff0c\u6700\u540e\u4e00\u4e2a alert(b)\uff0c\u7ed3\u679c\u4ecd\u7136\u662f 789\u3002<\/p>\n

                   <\/p>\n

                   <\/p>\n

                  \n
                    \n
                  1. function\u00a0Foo()\u00a0{<\/li>\n
                  2. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
                  3. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.b\u00a0=\u00a0789;<\/li>\n
                  4. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
                  5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(function()\u00a0{<\/li>\n
                  6. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(this.b);\u00a0\/\/\u00a0789<\/li>\n
                  7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(b);\u00a0\/\/\u00a0undefined<\/li>\n
                  8. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var\u00a0b\u00a0=\u00a00;<\/li>\n
                  9. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0alert(b);\u00a0\/\/\u00a00<\/li>\n
                  10. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0})();<\/li>\n
                  11. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
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                  16. \u00a0\u00a0\u00a0\u00a0})();<\/li>\n<\/ol>\n<\/div>\n

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                    (function() \u00a0{ \u00a0\u00a0\u00a0\u00a0\u00a0alert(“cftea”); \u00a0})(); …<\/p>\n","protected":false},"author":2,"featured_media":228,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[38],"tags":[120],"_links":{"self":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/1516"}],"collection":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/comments?post=1516"}],"version-history":[{"count":1,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/1516\/revisions"}],"predecessor-version":[{"id":1517,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/1516\/revisions\/1517"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/media\/228"}],"wp:attachment":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/media?parent=1516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/categories?post=1516"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/tags?post=1516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}