{"title":"TypeScript\u306e\u578b\u3092\u5fa9\u7fd2\u3059\u308b\u3000\u305d\u306e4","provider_name":"Hatena Blog","width":"100%","blog_url":"https://shironeko.hateblo.jp/","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshironeko.hateblo.jp%2Fentry%2F2025%2F12%2F05%2F231032\" title=\"TypeScript\u306e\u578b\u3092\u5fa9\u7fd2\u3059\u308b\u3000\u305d\u306e4 - \u767d\u732b\u306e\u30e1\u30e2\u5e33\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","categories":["TypeScript"],"published":"2025-12-05 23:10:32","description":"\u3053\u3093\u3070\u3093\u306f\u3002 \u96d1\u591a\u306b\u672c\u3092\u8cb7\u3044\u3059\u304e\u3066\u7a4d\u307f\u672c\u304c\u5897\u3048\u3066\u304d\u307e\u3057\u305f\u3002 \u4eca\u56de\u306fConditional Types\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002\u540d\u524d\u306e\u901a\u308a\u6761\u4ef6\u5206\u5c90\u304c\u3067\u304d\u308b\u578b\u3067\u3059\u3002 \u306a\u3093\u3067\u305d\u3093\u306a\u3053\u3068\u304c\u3057\u305f\u3044\u306e\u304b\u3068\u304b\u3001\u3069\u3046\u3044\u3046\u3068\u304d\u306b\u5f79\u306b\u7acb\u3064\u306e\u304b\u3068\u3044\u3046\u8a71\u3092\u5148\u306b\u3057\u305f\u3044\u306e\u3067\u3059\u304c\u3001\u305d\u3082\u305d\u3082\u6587\u6cd5\u3092\u77e5\u3089\u306a\u3044\u3068\u8a71\u304c\u9032\u307e\u306a\u3044\u306e\u3067\u3001\u5148\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002 \u6761\u4ef6\u578b\uff08Conditional Types\uff09 \u578b\u3092\u8981\u6c42\u3059\u308b\u5834\u9762\u3067extends\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u3088\u3046\u306b\u6761\u4ef6\u5206\u5c90\u3092\u884c\u3044\u307e\u3059\u3002 \u3061\u306a\u307f\u306b\u3053\u306eextends\u306f\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u578b\u306e\u5236\u7d04\u3067\u4f7f\u3046extends\u3068\u306f\u5225\u7269\u3067\u3059\u3002 test('\u57fa\u672c\u5f62', () => { type IsString<T>\u2026","blog_title":"\u767d\u732b\u306e\u30e1\u30e2\u5e33","version":"1.0","url":"https://shironeko.hateblo.jp/entry/2025/12/05/231032","type":"rich","author_name":"Shiro-Neko","author_url":"https://blog.hatena.ne.jp/Shiro-Neko/","provider_url":"https://hatena.blog"}