{"blog_url":"https://unageanu.hatenablog.com/","blog_title":"\u3046\u306a\u306e\u65e5\u8a18","author_name":"unageanu","provider_name":"Hatena Blog","height":"190","published":"2009-08-05 12:09:41","version":"1.0","image_url":null,"author_url":"https://blog.hatena.ne.jp/unageanu/","provider_url":"https://hatena.blog","url":"https://unageanu.hatenablog.com/entry/20090805/1249441781","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Funageanu.hatenablog.com%2Fentry%2F20090805%2F1249441781\" title=\" JavaScript\u3067\u306f\u300c||=\u300d\u306f\u4f7f\u3048\u306a\u3044\u306e\u304b\u30fb\u30fb\u30fb\u3002 - \u3046\u306a\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u3044\u307e\u3055\u3089\u3060\u3051\u3069\u3001JavaScript\u3067\u306f\u300c||=\u300d\u306f\u4f7f\u3048\u306a\u3044\u306e\u304b\u30fb\u30fb\u30fb\u3002\u300c+=\u300d\u306f\u4f7f\u3048\u308b\u306e\u306b\u30fb\u30fb\u30fb\u3002 // foo\u304cnull\u3068\u304bundefined\u306a\u3089\"foo\"\u3092\u4ee3\u5165 foo ||= \"foo\"; // \u30a8\u30e9\u30fc! \u2191\u306f\u3053\u3046\u66f8\u304f\u3057\u304b\u306a\u3044\u304b\u3002\u306c\u30fc\u3002 foo = foo || \"foo\";","type":"rich","width":"100%","title":" JavaScript\u3067\u306f\u300c||=\u300d\u306f\u4f7f\u3048\u306a\u3044\u306e\u304b\u30fb\u30fb\u30fb\u3002","categories":["JavaScript"]}