{"author_name":"potisan","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpotisan-programming-memo.hatenablog.jp%2Fentry%2F2022%2F06%2F05%2F174732\" title=\"JavaScript \u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3059\u308b - potisan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","provider_name":"Hatena Blog","blog_title":"potisan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30e1\u30e2","url":"https://potisan-programming-memo.hatenablog.jp/entry/2022/06/05/174732","blog_url":"https://potisan-programming-memo.hatenablog.jp/","categories":["JavaScript","\u307e\u3068\u3081\u672a\u767b\u9332\uff08\u7ba1\u7406\u7528\uff09"],"published":"2022-06-05 17:47:32","provider_url":"https://hatena.blog","image_url":null,"title":"JavaScript \u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3059\u308b","version":"1.0","author_url":"https://blog.hatena.ne.jp/potisan/","description":"\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306econstructor\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u64cd\u4f5c\u3059\u308c\u3070\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3067\u304d\u307e\u3059\u3002 class Class1 { static X = 123; } const a = new Class1(); console.log(a.constructor.X) //-> 123 a.constructor.X = 456; console.log(a.constructor.X) //-> 456 \u86c7\u8db3 \u73fe\u5728\u306eECMAScript\u306b\u306f\u30af\u30e9\u30b9\u304b\u5426\u304b\u3092\u5224\u5225\u3059\u308b\u7c21\u5358\u306a\u65b9\u6cd5\u306f\u306a\u3044\u3088\u3046\u3067\u3059\u3002 static {...}\u306e\u4e2d\u3067\u306fthis\u3067\u2026","type":"rich","width":"100%"}