回答編集履歴
1
質問の変更に合わせて変更
answer
CHANGED
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@@ -1,5 +1,5 @@
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1
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```js
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2
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-
var inputVal = document.getElementById("
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2
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+
var inputVal = document.getElementById("InputId"); //←
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3
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if (inputVal.value == "") { //←
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inputVal.style.backgroundColor = "yellow";
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5
5
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} else {
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