{"author_name":"plarail_hangout","provider_url":"https://hatena.blog","blog_url":"https://tech.fun-toy-life.com/","blog_title":"Engineering Tech Dojo","categories":["JavaScript"],"type":"rich","provider_name":"Hatena Blog","version":"1.0","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","url":"https://tech.fun-toy-life.com/entry/2026/07/05/155537","published":"2026-07-05 15:55:37","description":"JavaScript\u3067\u65e5\u4ed8\u304c1\u65e5\u305a\u308c\u308b\u539f\u56e0\uff1a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u554f\u984c\u306e\u5bfe\u51e6\u6cd5\u307e\u3068\u3081 JavaScript \u3067\u65e5\u4ed8\u3092\u6271\u3046\u3068\u304d\u300c\u4fdd\u5b58\u3057\u305f\u306f\u305a\u306e\u65e5\u4ed8\u304c1\u65e5\u524d\u306b\u306a\u3063\u3066\u3044\u308b\u300d\u300cAPI \u306b\u9001\u3063\u305f\u3089\u524d\u65e5\u306e\u65e5\u4ed8\u304c\u5c4a\u3044\u305f\u300d\u3068\u3044\u3046\u554f\u984c\u304c\u3088\u304f\u8d77\u304d\u307e\u3059\u3002\u539f\u56e0\u306f\u307b\u307c\u5fc5\u305a UTC \u3068\u30ed\u30fc\u30ab\u30eb\u6642\u523b\u306e\u89e3\u91c8\u306e\u9055\u3044 \u3067\u3059\u3002 \u306a\u305c\u305a\u308c\u308b\u306e\u304b\uff1a2\u7a2e\u985e\u306e\u89e3\u91c8 new Date() \u306b\u6587\u5b57\u5217\u3092\u6e21\u3059\u3068\u304d\u3001\u66f8\u304d\u65b9\u306b\u3088\u3063\u3066 UTC \u304b \u30ed\u30fc\u30ab\u30eb\u6642\u523b \u306e\u3069\u3061\u3089\u3067\u89e3\u91c8\u3055\u308c\u308b\u304b\u304c\u5909\u308f\u308a\u307e\u3059\u3002 \u66f8\u304d\u65b9 \u89e3\u91c8 new Date('2026-07-05') UTC \u3068\u3057\u3066\u89e3\u91c8\uff08ISO 8601 \u4ed5\u69d8\uff09 new Date('2026/07/05') \u30ed\u30fc\u30ab\u30eb\u6642\u523b \u2026","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F07%2F05%2F155537\" title=\"JavaScript\u3067\u65e5\u4ed8\u304c1\u65e5\u305a\u308c\u308b\u539f\u56e0\uff1a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u554f\u984c\u306e\u5bfe\u51e6\u6cd5\u307e\u3068\u3081 - Engineering Tech Dojo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"JavaScript\u3067\u65e5\u4ed8\u304c1\u65e5\u305a\u308c\u308b\u539f\u56e0\uff1a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u554f\u984c\u306e\u5bfe\u51e6\u6cd5\u307e\u3068\u3081","width":"100%","height":"190"}