回答編集履歴
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テキスト追加
test
CHANGED
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@@ -41,3 +41,201 @@
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```
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に、一行でも書けるよってに。
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### 補足
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以下は本題とは無関係なお節介なので、時間あるときにでも読んでみてや。
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ここんとこ
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```jsx
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<form>
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<label>
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<input type="radio" value="all" onChange={(e) => setRadio(e.target.value)} checked={radio === "all"} />
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全て
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</label>
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<label>
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<input
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type="radio"
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value="incomplete"
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onChange={(e) => setRadio(e.target.value)}
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checked={radio === "incomplete"}
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/>
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作業中
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</label>
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<label>
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<input
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type="radio"
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value="completed"
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onChange={(e) => setRadio(e.target.value)}
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checked={radio === "completed"}
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/>
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完了
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</label>
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</form>
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```
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<form>の中に、ラジオボタン３つ並べてるんやけど、似たようなコードのかたまりが3回連続するやん。そやから <label>から </label> までんとこ、別のコンポーネントに切り出すとええで。やり方の一例としては、こんなん
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```diff
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import React, { useState } from "react";
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+const FILTER_VALUES = [
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+ { value: "all", text: "全て" },
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+ { value: "incomplete", text: "作業中" },
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+ { value: "completed", text: "完了" }
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+];
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+const FilterButton = ({ value, text, checked, onChange }) => (
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+ <label>
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+ <input
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+ type="radio"
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+ value={value}
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+ onChange={(e) => onChange(e.target.value)}
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+ checked={checked}
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+ />
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+ {text}
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+ </label>
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+);
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//入力用 todos
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//未完了のTodo用 comment
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function App() {
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const [todos, setTodos] = useState([]);
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```
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を追加しといて、こうや。
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```diff
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<form>
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- <label>
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- <input type="radio" value="all" onChange={(e) => setRadio(e.target.value)} checked={radio === "all"} />
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- 全て
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- </label>
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- <label>
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- <input
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- type="radio"
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- value="incomplete"
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- onChange={(e) => setRadio(e.target.value)}
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- checked={radio === "incomplete"}
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- />
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- 作業中
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- </label>
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- <label>
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- <input
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- type="radio"
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- value="completed"
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- onChange={(e) => setRadio(e.target.value)}
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- checked={radio === "completed"}
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+ {FILTER_VALUES.map(({ value, text }) => (
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+ <FilterButton
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+ key={value}
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+ value={value}
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+ text={text}
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+ checked={radio === value}
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+ onChange={setRadio}
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/>
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- 完了
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- </label>
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+ ))}
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</form>
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```
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