{"blog_title":"\u30a8\u30f3\u30bf\u30fc\u30c6\u30a4\u30e1\u30f3\u30c8\uff01\uff01","published":"2021-06-26 14:26:39","height":"190","author_name":"suzaku0914","blog_url":"https://suzaku-tec.hatenadiary.jp/","image_url":null,"provider_name":"Hatena Blog","type":"rich","width":"100%","description":"\u80cc\u666f Javascript\u3067\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u3044\u308b\u969b\u306b\u3001var a = test ?? \"empty\"\u307f\u305f\u3044\u306a\u30b3\u30fc\u30c9\u306b\u51fa\u4f1a\u3063\u305f\u3002 \u4e09\u9805\u6f14\u7b97\u5b50\u3067\u3082\u306a\u3044\u3057\u3001\u4e00\u4f53\u4f55\u306a\u3093\u3060\uff1f\u3063\u3066\u306e\u304c\u7591\u554f\u306b\u306a\u3063\u305f\u306e\u3067\u8abf\u3079\u305f\u3002 \u8abf\u67fb\u7d50\u679c Null\u5408\u4f53\u6f14\u7b97\u5b50 \u3068\u3044\u3046\u3082\u306e\u3089\u3057\u3044\u3002 \u5de6\u8fba\u304c null \u307e\u305f\u306f undefined \u306e\u5834\u5408\u3001\u53f3\u8fba\u304c\u5909\u3048\u308b\u3068\u306e\u3053\u3068\u3002 \u5b9f\u9a13 null\u306e\u5834\u5408 const foo = null ?? 'default string'; console.log(foo); // expected output: \"default string\" \u554f\u984c\u306a\u3057 undefined\u306e\u5834\u5408 const foo = unde\u2026","title":"Javascript\u306e\u69cb\u6587\u306b\u51fa\u3066\u304f\u308b\u300c??\u300d\u3063\u3066\u4f55\uff1f","version":"1.0","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsuzaku-tec.hatenadiary.jp%2Fentry%2F2021%2F06%2F26%2F142639\" title=\"Javascript\u306e\u69cb\u6587\u306b\u51fa\u3066\u304f\u308b\u300c??\u300d\u3063\u3066\u4f55\uff1f - \u30a8\u30f3\u30bf\u30fc\u30c6\u30a4\u30e1\u30f3\u30c8\uff01\uff01\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://suzaku-tec.hatenadiary.jp/entry/2021/06/26/142639","author_url":"https://blog.hatena.ne.jp/suzaku0914/","categories":["JavaScript","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","\u6065\u6652\u3057","\u5b66\u7fd2"]}