{"id":6913,"date":"2022-12-01T11:30:54","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.wangonc.com\/?p=6913"},"modified":"2023-02-01T20:11:48","modified_gmt":"2023-02-01T12:11:48","slug":"closures-in-javascript","status":"publish","type":"post","link":"https:\/\/www.wangonc.com\/index.php\/2022\/12\/01\/closures-in-javascript\/","title":{"rendered":"Javascript\u4e2d\u7684\u95ed\u5305"},"content":{"rendered":"<p>\u95ed\u5305\u672c\u8d28\u4e0a\u662f\u51fd\u6570\u8bbf\u95ee\u4e86\u6b64\u51fd\u6570\u7684\u7236\u7ea7\u53ca\u7236\u7ea7\u4ee5\u4e0a\u7684\u4f5c\u7528\u57df\u53d8\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f\u4e00\u4e2a\u95ed\u5305\u3002<\/p>\n<p>\u6240\u4ee5\u6700\u7b80\u5355\u7684\uff0c\u4e0b\u9762\u7684\u4ee3\u7801\u5c31\u662f\u4e00\u4e2a\u95ed\u5305<\/p>\n<pre><code class=\"language-js\">var a = 1;\n(function test (){\n    alert(a);\n})()<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u5229\u7528\u533f\u540d\u51fd\u6570\u4f7f\u5f97\u51fd\u6570\u7acb\u5373\u6267\u884c\uff0c\u51fd\u6570\u4e2d\u8c03\u7528\u4e86\u51fd\u6570\u5916\u7684\u5168\u5c40\u53d8\u91cfa\uff0c\u6240\u4ee5\u662f\u4e00\u4e2a\u95ed\u5305\u3002<\/p>\n<p>\u5229\u7528js\u5783\u573e\u56de\u6536\u7684\u7279\u70b9\uff0c\u4f7f\u5f97\u95ed\u5305\u53ef\u4ee5\u5728\u51fd\u6570\u5916\u90e8\u8bbf\u95ee\u51fd\u6570\u5185\u90e8\u7684\u53d8\u91cf\u3002<\/p>\n<p>\u4e0b\u9762\u4e00\u6bb5\u4ee3\u7801\u6765\u81eafacebook\u7684marketplace\u521b\u5efa\u5546\u54c1\u65f6\u4e0a\u4f20\u56fe\u7247\u751f\u6210uoload_id\u7684\u903b\u8f91<\/p>\n<pre><code class=\"language-js\">__d(PhotosUploadID, [], (function(a, b, c, d, e, f) {\n    var g = 1024;\n    function a() {\n        return (g++).toString()\n    }\n    f.getNewID = a\n}\n), 66);\n\n\/\/ some code\n\/\/ ...\n\na.uploadID = d(PhotosUp1oadID).getNewID()<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u5c31\u662f\u4e00\u6bb5\u5e38\u89c1\u7684\u5178\u578b\u7684\u95ed\u5305\u3002\u4f7f\u7528requirejs\u5b9a\u4e49\u6a21\u5757\uff0c\u521d\u59cb\u5316\u53d8\u91cfg\uff0c\u4ece1024\u5f00\u59cb\u53d6\u503c\uff0c\u800c\u540e\u6bcf\u6b21\u8c03\u7528getNewID\u90fd\u4f1a\u5728g\u5f53\u524d\u503c\u7684\u57fa\u7840\u4e0a+1\u3002\u5229\u7528\u4e86js\u95ed\u5305\u4e2d\u7684\u53d8\u91cf\u548c\u53c2\u6570\u4e0d\u4f1a\u88ab\u5783\u573e\u56de\u6536\u7684\u673a\u5236\uff0c\u5b9e\u73b0\u4e86\u4e00\u4e2a\u51fd\u6570\u8ba1\u6570\u5668\u3002\u5728\u5f53\u524d\u9875\u9762\u6bcf\u4e0a\u4f20\u4e00\u5f20\u56fe\u7247\uff0cupload\u90fd\u4f1a+1\uff0c\u800c\u5237\u65b0\u9875\u9762\u540e\u5219\u4f1a\u91cd\u7f6e\u4e3a1024.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u95ed\u5305\u672c\u8d28\u4e0a\u662f\u51fd\u6570\u8bbf\u95ee\u4e86\u6b64\u51fd\u6570\u7684\u7236\u7ea7\u53ca\u7236\u7ea7\u4ee5\u4e0a\u7684\u4f5c\u7528\u57df\u53d8\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f\u4e00\u4e2a\u95ed\u5305\u3002 \u6240\u4ee5\u6700\u7b80\u5355\u7684\uff0c\u4e0b\u9762\u7684\u4ee3\u7801 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69],"tags":[64,62],"series":[],"class_list":["post-6913","post","type-post","status-publish","format-standard","hentry","category-spider","tag-facebook","tag-62"],"_links":{"self":[{"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/posts\/6913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/comments?post=6913"}],"version-history":[{"count":9,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/posts\/6913\/revisions"}],"predecessor-version":[{"id":7194,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/posts\/6913\/revisions\/7194"}],"wp:attachment":[{"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/media?parent=6913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/categories?post=6913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/tags?post=6913"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/www.wangonc.com\/index.php\/wp-json\/wp\/v2\/series?post=6913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}