{"provider_name":"Hatena Blog","url":"https://www.ikkitang1211.site/entry/defer-null-undefined","image_url":null,"published":"2021-03-30 10:18:22","author_url":"https://blog.hatena.ne.jp/ikkitang1211/","title":"JavaScript\u306eundefined \u3068 null\u306e\u9055\u3044\u3092\u8abf\u3079\u305f","type":"rich","description":"\u305d\u3082\u305d\u3082\u306e\u524d\u63d0\u3068\u3057\u3066\u66f8\u3044\u3066\u308b\u81ea\u5206\u306fJS\u3092\u4e01\u5ea6\u5165\u9580\u4e2d\u3067 \u66f8\u7c4d\u3068\u304b\u898b\u306a\u304c\u3089\u52c9\u5f37\u3057\u3066\u3044\u308b\u6240\u3067\u3059\u3002 \u3068\u3044\u3046\u4e8b\u3067\u3001TypeScript\u306e\u7ae0\u3067 3\u30da\u30fc\u30b8\u76ee\u3050\u3089\u3044\u3067 \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3068\u3057\u3066 null \u3068 undefined \u304c\u660e\u78ba\u306b\u533a\u5225\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002 PHP\u3068\u304b\u3084\u3063\u3066\u308b\u3068 null \u3068\u304b\u306f\u99b4\u67d3\u307f\u3042\u308b\u3093\u3060\u3051\u3069 undefined \u3068\u304b\u304c\u51fa\u3066\u304d\u3066\u3088\u304f\u308f\u304b\u3089\u3093\uff01 \u3063\u3066\u306a\u3063\u305f\u306e\u3067\u8abf\u3079\u3066\u307f\u3066\u307f\u307e\u3059\u3002\uff08 undefined \u306a\u3089\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3057 \uff09 \u3069\u3046\u3044\u3046\u610f\u5473\u304c\u3042\u3063\u3066\u3001\u3069\u3046\u3084\u3063\u3066\u4f7f\u3044\u5206\u3051\u308b\u304b\u307f\u305f\u3044\u306a\u306e\u3092\u30ad\u30e3\u30c3\u30c1\u30a2\u30c3\u30d7\u3067\u304d\u308c\u3070\u3044\u3044\u306a\u3002\u3002\u3063\u3066\u611f\u3058\u3067\u3059\u304b\u306d\u3002 \u516c\u5f0f\u898b\u89e3 typescript-jp.gitbook.io T\u2026","blog_title":"\u304a\uff1f\u610f\u5916\u3068\u3044\u3051\u308b\u3084\u3093\uff01","width":"100%","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.ikkitang1211.site%2Fentry%2Fdefer-null-undefined\" title=\"JavaScript\u306eundefined \u3068 null\u306e\u9055\u3044\u3092\u8abf\u3079\u305f - \u304a\uff1f\u610f\u5916\u3068\u3044\u3051\u308b\u3084\u3093\uff01\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","categories":["JavaScript","TypeScript"],"author_name":"ikkitang1211","blog_url":"https://www.ikkitang1211.site/","height":"190"}