回答編集履歴
2
ちょうせい
test
CHANGED
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@@ -38,6 +38,8 @@
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38
38
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39
39
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if(e.keyCode == 13){
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40
40
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41
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+
e.preventDefault();
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42
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+
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41
43
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t.value=v.substring(0,s)+"\n"+v.substring(s);
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42
44
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43
45
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t.selectionStart=s+1;
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1
追加
test
CHANGED
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@@ -17,3 +17,37 @@
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17
17
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```
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18
18
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19
19
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ただしformにイベントリスナーを直接書くのはおすすめしないのでjsを分離したほうがよいでしょう
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20
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+
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21
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+
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22
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+
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23
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+
# 追加処理
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24
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+
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25
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```javascript
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26
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+
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27
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document.addEventListener('keydown',e=>{
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28
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+
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29
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const selection = getSelection();
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30
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+
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31
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const t=e.target;
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32
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33
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if(t.closest('textarea')){
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34
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+
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35
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const v=t.value;
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36
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+
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37
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const s=t.selectionStart;
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38
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+
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39
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if(e.keyCode == 13){
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40
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+
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41
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t.value=v.substring(0,s)+"\n"+v.substring(s);
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42
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+
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43
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t.selectionStart=s+1;
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44
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45
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t.selectionEnd=s+1;
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46
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+
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47
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}
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48
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+
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49
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}
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50
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+
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51
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});
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52
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+
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53
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```
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