回答編集履歴
1
sample
test
CHANGED
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@@ -3,3 +3,57 @@
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3
3
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年と月がきまれば
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4
4
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5
5
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new Date("2020-06-02")のような渡し方をすればその月のデータになるでしょう
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6
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+
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7
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+
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8
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9
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```javascript
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10
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+
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11
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<script>
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12
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13
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window.addEventListener('DOMContentLoaded', ()=>{
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14
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15
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const y=document.querySelector('#id_year');
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16
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17
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const m=document.querySelector('#id_month');
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18
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19
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const v=document.querySelector('#view');
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20
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21
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document.querySelector('#chk').addEventListener('click',()=>{
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22
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23
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v.textContent=new Date(`${y.value}-${m.value}-01`);
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24
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25
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});
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26
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27
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});
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28
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29
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</script>
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30
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31
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<select class="cl_year" id="id_year">
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32
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33
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<option value="2021">2021</option>
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34
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35
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<option value="2020">2020</option>
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36
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37
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<option value="2019">2019</option>
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38
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39
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</select>
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40
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41
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年
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42
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43
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<select class="cl_month" id="id_month">
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44
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45
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<option value="01">1</option>
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46
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47
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<option value="02">2</option>
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48
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49
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<option value="03">3</option>
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50
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51
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</select>
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52
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53
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月
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54
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55
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<input type="button" value="check" id="chk">
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56
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57
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<div id="view"></div>
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58
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59
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```
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