{"description":"\u30b3\u30e9\u30e0:Object.prototype\u3092\u7d99\u627f\u3057\u306a\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 Object\u306f\u3059\u3079\u3066\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u89aa\u306b\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\u3068\u3044\u3046\u8a71\u3067\u3057\u305f\u304c\u3001\u4f8b\u5916\u3082\u3042\u308b\u305d\u3046\u3067\u3059\u3002 \u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u306fObject.prototype\u3092\u5f15\u6570\u306b\u6301\u305f\u305a\u306bnull\u3092\u6e21\u3059\u3068\u3001prototype\u306f\u7d99\u627f\u3057\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002 // \u89aa\u304cnull\u3001\u3064\u307e\u308a\u89aa\u304c\u3044\u306a\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308a\u307e\u3059\u3002 const obj = Object.create(null); // Object.prototype\u3092\u7d99\u627f\u3057\u306a\u3044\u305f\u3081\u3001hasOwnProperty\u304c\u5b58\u5728\u3057\u3066\u3044\u307e\u305b\u3093\u3002 console.log(obj.hasOwnProperty); \u2026","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmorning-6.hatenablog.com%2Fentry%2F2021%2F11%2F15%2F092329\" title=\"2021\u5e7411\u670815\u65e5 JavaScript (JS Primer) \u914d\u5217 - \uff16\u6642\u3060\u30e7!!\u5168\u54e1\u96c6\u5408!!\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2021-11-15 09:23:29","url":"https://morning-6.hatenablog.com/entry/2021/11/15/092329","author_name":"morning_6","type":"rich","provider_name":"Hatena Blog","version":"1.0","blog_title":"\uff16\u6642\u3060\u30e7!!\u5168\u54e1\u96c6\u5408!!","categories":["JavaScript"],"author_url":"https://blog.hatena.ne.jp/morning_6/","height":"190","title":"2021\u5e7411\u670815\u65e5 JavaScript (JS Primer) \u914d\u5217","image_url":"https://i.gyazo.com/50728286f04cf531177ccde2a330642b.png","width":"100%","blog_url":"https://morning-6.hatenablog.com/"}