回答編集履歴
1
chousei
test
CHANGED
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@@ -1,6 +1,16 @@
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1
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```javascript
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2
2
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3
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+
<button class="A B C">btn</button>
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4
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5
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<script>
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6
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7
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document.querySelector('.A').addEventListener('click',e=>{
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8
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3
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-
['B','C','X','Y'].forEach(x=>
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9
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['B','C','X','Y'].forEach(x=>e.target.classList.toggle(x));
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10
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11
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});
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12
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+
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13
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</script>
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4
14
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5
15
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6
16
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