{"id":4318,"date":"2015-06-18T11:32:34","date_gmt":"2015-06-18T02:32:34","guid":{"rendered":"https:\/\/gunmagisgeek.com\/wordpress\/?p=4318"},"modified":"2015-06-18T11:32:34","modified_gmt":"2015-06-18T02:32:34","slug":"post-4318","status":"publish","type":"post","link":"https:\/\/gunmagisgeek.com\/blog\/javascript\/4318","title":{"rendered":"\u975e\u540c\u671f\u51e6\u7406\u6642\u306b\u304a\u3051\u308bconsole.log\u306e\u3061\u3087\u3063\u3068\u3057\u305f\u30c8\u30e9\u30c3\u30d7"},"content":{"rendered":"<p>\u305f\u307e\u306b\u3072\u3063\u304b\u304b\u308b\u3002<\/p>\n<pre class=\"lang:js decode:true \" >var a = {};\r\n\r\nsetTimeout(function(){\r\n\ta.hoge = \"Hello world!\";\r\n},1000);\r\n\r\nconsole.log(\"output a ->\", a); \/\/ output-> { hoge:\"Hello world\" }\r\nconsole.log(\"output a.hoge ->\", a.hoge); \/\/ output-> undefined\t\r\n<\/pre>\n<p>\u4e0a\u8a18\u30b3\u30fc\u30c9\u306f\u3001\u5909\u6570a\u306b\u5bfe\u3057\u3066setTimeout\u30671\u79d2\u5f8c\u306bhoge\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002setTimeout\u306f\u975e\u540c\u671f\u51e6\u7406\u3067\u3042\u308b\u306e\u3067\u3001\u305d\u306e\u4e0b\u306b\u66f8\u304b\u308c\u3066\u3044\u308bconsole.log(a)\u304choge\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u524d\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<br \/>\n\u3057\u305f\u304c\u3063\u3066\u3001console.log\u5b9f\u884c\u6642\u306b\u306fa.hoge\u30d7\u30ed\u30d1\u30c6\u30a3\u306f\u5b58\u5728\u3057\u3066\u3044\u306a\u3044\u306f\u305a\u306a\u306e\u3067\u3059\u304c\u3001JavaScript\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u306f\u3042\u305f\u304b\u3082a.hoge\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u5b58\u5728\u3057\u3066\u3044\u308b\u304b\u306e\u3088\u3046\u306b\u51fa\u529b\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u304b\u3082\u540c\u3058\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3057\u305f\u306f\u305a\u306econsole.log(a.hoge)\u3067\u306f\u300cundefined\u300d\u304c\u51fa\u529b\u3055\u308c\u308b\u3068\u3044\u3046\u77db\u76fe\u3057\u305f\u51fa\u529b\u7d50\u679c\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap1.jpg\" alt=\"console.log trap\" width=\"507\" height=\"137\" class=\"aligncenter size-full wp-image-4323 border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap1.jpg 507w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap1-300x81.jpg 300w\" sizes=\"auto, (max-width: 507px) 100vw, 507px\" \/><\/p>\n<p><strong>\u753b\u9762\u304c\u8868\u793a\u304c\u7d42\u308f\u308a\u975e\u540c\u671f\u51e6\u7406\u3092\u542b\u3080JavaScript\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u305f\u5f8c\u306b\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u8d77\u52d5\u3059\u308b\u3068\u3001\u3053\u306e\u73fe\u8c61\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/strong><br \/>\n\u3061\u306a\u307f\u306b\u3001\u521d\u3081\u304b\u3089JavaScript\u30b3\u30f3\u30bd\u30fc\u30eb\u8d77\u52d5\u3057\u3066\u304a\u3044\u3066\u30ea\u30ed\u30fc\u30c9\u3059\u308b\u3068\u4e0b\u8a18\u306e\u901a\u308a\u7a7a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u6b63\u3057\u304f\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap2.jpg\" alt=\"console.log trap\" width=\"507\" height=\"106\" class=\"aligncenter size-full wp-image-4324  border\" srcset=\"https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap2.jpg 507w, https:\/\/gunmagisgeek.com\/blog\/wp-content\/uploads\/2015\/06\/console.log-trap2-300x63.jpg 300w\" sizes=\"auto, (max-width: 507px) 100vw, 507px\" \/><\/p>\n<p>\u3069\u3046\u3082\u3001<strong>console.log\u5b9f\u884c\u6642\u306b\u30b3\u30f3\u30bd\u30fc\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u3068\u30b3\u30f3\u30bd\u30fc\u30eb\u8d77\u52d5\u6642\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u51fa\u529b\u304c\u884c\u308f\u308c\u308b\u3089\u3057\u3044<\/strong>\u306e\u3067\u3059\u304c\u3001\u30c7\u30d0\u30c3\u30b0\u306e\u969b\u306b\u3053\u306e\u73fe\u8c61\u306b\u5f15\u3063\u304b\u304b\u308b\u3068\u6df7\u4e71\u3059\u308b\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><a href=\"http:\/\/shimz.me\/example\/js\/console.log-trap\/test.html\">\u30c6\u30b9\u30c8\u7528\u30da\u30fc\u30b8<\/a><\/p>\n<p>\u3061\u306a\u307f\u306b\u3001Chrome\u3068Firefox\u3067\u3053\u306e\u73fe\u8c61\u304c\u767a\u751f\u3059\u308b\u306e\u306f\u78ba\u8a8d\u3001IE\u306f\u305d\u3082\u305d\u3082\u30da\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u3066\u304b\u3089\u958b\u767a\u8005\u30c4\u30fc\u30eb\u3092\u8d77\u52d5\u3057\u305f\u5834\u5408\u30b3\u30f3\u30bd\u30fc\u30eb\u3078\u306e\u51fa\u529b\u3092\u884c\u308f\u306a\u3044\u306e\u3067\u767a\u751f\u3057\u306a\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u305f\u307e\u306b\u3072\u3063\u304b\u304b\u308b\u3002 var a = {}; set&hellip;<\/p>\n","protected":false},"author":1,"featured_media":4323,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-4318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","has-post-thumbnail-archive"],"_links":{"self":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts\/4318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/comments?post=4318"}],"version-history":[{"count":0,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/posts\/4318\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/media\/4323"}],"wp:attachment":[{"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/media?parent=4318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/categories?post=4318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gunmagisgeek.com\/blog\/wp-json\/wp\/v2\/tags?post=4318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}