回答編集履歴
1
tuiki
test
CHANGED
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@@ -13,3 +13,18 @@
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13
13
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</script>
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<p>私は "太郎" です</p>
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15
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```
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16
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+
# 念の為
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17
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```javascript
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18
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window.addEventListener('DOMContentLoaded', ()=>{
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19
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const p=document.querySelector('p');
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20
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const ta=document.createElement('textarea');
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21
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ta.setAttribute('placeholder',p.textContent);
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22
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ta.value=p.textContent;
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p.parentNode.insertBefore(ta,p);
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p.remove();
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25
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document.querySelector('textarea').addEventListener('input',e=>{
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26
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const t=e.target;
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27
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console.log(t.getAttribute('placeholder')===t.value);
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28
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});
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});
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30
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```
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