{"provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","blog_title":"Engineering Tech Dojo","title":"React\u306euseReducer\u5165\u9580\uff1auseState\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051","author_name":"plarail_hangout","width":"100%","published":"2026-06-06 10:51:45","categories":["React","TypeScript"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F06%2F06%2F105145\" title=\"React\u306euseReducer\u5165\u9580\uff1auseState\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051 - Engineering Tech Dojo\" 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","type":"rich","blog_url":"https://tech.fun-toy-life.com/","url":"https://tech.fun-toy-life.com/entry/2026/06/06/105145","version":"1.0","image_url":null,"description":"React\u306euseReducer\u5165\u9580\uff1auseState\u3068\u306e\u9055\u3044\u3068\u4f7f\u3044\u5206\u3051 useReducer\u3068\u306f useReducer \u306f useState \u306e\u4ee3\u66ff\u3068\u306a\u308b\u30d5\u30c3\u30af\u3067\u3001\u8907\u6570\u306e\u72b6\u614b\u3084\u8907\u96d1\u306a\u72b6\u614b\u9077\u79fb\u3092\u7ba1\u7406\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002Redux\u3068\u540c\u3058\u300caction \u2192 reducer \u2192 \u65b0\u3057\u3044\u72b6\u614b\u300d\u3068\u3044\u3046\u30d1\u30bf\u30fc\u30f3\u3067\u72b6\u614b\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002 \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9 import { useReducer } from 'react' type State = { count: number } type Action = { type: 'increment' } | { type: 'decrement' } | { \u2026","provider_name":"Hatena Blog"}