質問編集履歴
1
コードの変更
title
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File without changes
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body
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@@ -26,4 +26,49 @@
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26
26
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<form method="post" th:action="@{/cart/delete/}+${cart.id}">
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27
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<input type="submit" value="削除" class="delete" />
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28
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</form>
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29
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+
```
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30
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+
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31
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+
jsファイル
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32
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+
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33
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```ここに言語を入力
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34
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+
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35
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/**
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36
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*
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37
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*/
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38
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function addNum(count) {
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39
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var num = count.innerText;
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40
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var name = count.id;
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41
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var lastNum = name.substr(1);
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42
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var targetId1 = "b" + lastNum;
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43
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var targetId2 = "c" + lastNum;
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44
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var elm1 = document.getElementById(targetId1);
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45
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var elm2 = document.getElementById(targetId2);
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46
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var num2 = Number(elm1.value);
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47
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var num3 = Number(elm2.value);
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48
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num = Number(num);
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49
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if (num3 > num) {
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50
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num++;
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51
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num2++;
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52
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}
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53
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+
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54
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count.innerText = num;
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55
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elm1.value = num2;
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56
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}
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57
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+
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58
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function subtractNum(count) {
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59
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var num = count.innerText;
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60
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var name = count.id;
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61
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var lastNum = name.substr(1);
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62
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var targetId = "b" + lastNum;
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63
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var elm = document.getElementById(targetId);
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64
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var num2 = Number(elm.value);
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65
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num = Number(num);
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66
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if (num > 1) {
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num--;
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num2--;
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}
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70
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+
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count.innerText = num;
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72
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elm.value = num2;
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}
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29
74
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```
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