回答編集履歴
1
リファクタリング
answer
CHANGED
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@@ -30,9 +30,9 @@
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30
30
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handleChange = (event) => {
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31
31
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const name = event.target.name;
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32
32
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const rawString = event.target.value;
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33
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-
const number = Number.parseInt(
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33
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+
const number = Number.parseInt(rawString, 10);
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34
34
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35
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-
if (isNaN(number)) {
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35
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+
if (Number.isNaN(number)) {
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36
36
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// NaNの場合はnumberを更新しない
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37
37
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this.setState({
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38
38
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...this.state,
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