回答編集履歴
1
ソースコードにコメント追記
answer
CHANGED
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@@ -30,11 +30,13 @@
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typeof forInput[key as keyof typeof forInput] === "string"
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) {
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+
//ここで型ガード関数作成
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const isString = (value: unknown): value is string =>
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typeof value === "string";
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if (isString(objInstance[key as keyof typeof objInstance])) {
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if (isString(forInput[key as keyof typeof forInput])) {
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+
//代入する時も as string にキャストしてから入れる
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(objInstance[key as keyof typeof objInstance] as string) = forInput[
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key as keyof typeof forInput
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] as string;
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@@ -43,7 +45,8 @@
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}
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});
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console.log(objInstance);
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+
期待する結果となった
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46
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-
baseClass { id: 123, name: 'base1', name2: 'input name' }
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+
//baseClass { id: 123, name: 'base1', name2: 'input name' }
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```
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tsc後のjs抜粋
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