{"blog_url":"https://uraway.hatenablog.com/","author_name":"uraway","blog_title":"\u6587\u7cfb\u30d7\u30ed\u30b0\u30e9\u30de\u30fc","author_url":"https://blog.hatena.ne.jp/uraway/","height":"190","type":"rich","provider_name":"Hatena Blog","url":"https://uraway.hatenablog.com/entry/2018/01/12/000957","published":"2018-01-12 00:09:57","image_url":null,"categories":["javascript"],"width":"100%","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Furaway.hatenablog.com%2Fentry%2F2018%2F01%2F12%2F000957\" title=\"\u50d5\u3089\u306f JavaScript \u3092\u77e5\u3089\u306a\u3044 - \u30b7\u30f3\u30dc\u30eb Symbol - \u6587\u7cfb\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u50d5\u3089\u306f JavaScript \u3092\u77e5\u3089\u306a\u3044 - \u30b7\u30f3\u30dc\u30eb Symbol","version":"1.0","description":"\u521d\u3081\u3066\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u89e6\u3063\u3066\u3001\u305d\u308c\u304b\u3089\u305a\u3063\u30682\u5e74\u304f\u3089\u3044 JavaScript \u4f7f\u3063\u3066\u307e\u3059\u304c\u3001\u306a\u304b\u306a\u304b\u521d\u5fc3\u8005\u304b\u3089\u629c\u3051\u51fa\u305b\u306a\u3044\u306a\u3042\u3068\u3044\u3046\u601d\u3044\u304c\u3042\u308a\u3001\u6065\u3092\u5fcd\u3093\u3067 JavaScript \u306e\u52c9\u5f37\u8a18\u4e8b\u3092\u66f8\u304f\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002\u305f\u3076\u3093\u4f55\u56de\u304b\u7d9a\u304d\u307e\u3059\u3002 \u53c2\u8003: You Don't Know JS \u6539\u8a02\u65b0\u7248JavaScript\u672c\u683c\u5165\u9580 \uff5e\u30e2\u30c0\u30f3\u30b9\u30bf\u30a4\u30eb\u306b\u3088\u308b\u57fa\u790e\u304b\u3089\u73fe\u5834\u3067\u306e\u5fdc\u7528\u307e\u3067 \u30b7\u30f3\u30dc\u30eb Symbol ES6 (\u5b9f\u88c5\u306f\u3082\u30463\u5e74\u4ee5\u4e0a\u524d\uff1f) \u3067\u306f \"Symbol\" \u3068\u547c\u3070\u308c\u308b\u30d7\u30ea\u30df\u30c6\u30a3\u30d6(\u57fa\u672c)\u30c7\u30fc\u30bf\u578b\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u4e0b\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5b9f\u969b\u306b\u30b7\u30f3\u30dc\u30eb\u3092\u751f\u6210\u3057\u3066\u3044\u307e\u3059: var sym = Symbol( \"som\u2026"}