{"blog_url":"https://numb86-tech.hatenablog.com/","author_name":"numb_86","height":"190","provider_url":"https://hatena.blog","categories":["ES2015(ES6)"],"url":"https://numb86-tech.hatenablog.com/entry/2016/12/19/154609","blog_title":"30\u6b73\u304b\u3089\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","version":"1.0","description":"JavaScript\u306e\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u6587\u5b57\u5217\u3001\u6570\u5024\u3001\u771f\u507d\u5024\u3001undefined\u3001null\u306e5\u3064\u3060\u3063\u305f\u304c\u3001ES2015\u304b\u3089\u30b7\u30f3\u30dc\u30eb\u304c\u52a0\u308f\u3063\u305f\u3002 Symbol()\u3092\u4f7f\u3046\u3053\u3068\u3067\u4f5c\u6210\u3067\u304d\u308b\u3002\u5f15\u6570\u306f\u5fc5\u9808\u3067\u306f\u306a\u3044\u3002 const mySymbol = Symbol(); const mySymbol2 = Symbol('name'); const mySymbol3 = Symbol(1); const mySymbol4 = Symbol(null); const mySymbol5 = Symbol({prop:mySymbol}); console.log(mySymbol); // Symbol(\u2026","width":"100%","published":"2016-12-19 15:46:09","author_url":"https://blog.hatena.ne.jp/numb_86/","image_url":null,"type":"rich","title":"ES2015\u3067\u8ffd\u52a0\u3055\u308c\u305f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3001\u30b7\u30f3\u30dc\u30eb","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnumb86-tech.hatenablog.com%2Fentry%2F2016%2F12%2F19%2F154609\" title=\"ES2015\u3067\u8ffd\u52a0\u3055\u308c\u305f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3001\u30b7\u30f3\u30dc\u30eb - 30\u6b73\u304b\u3089\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}