回答編集履歴
2
sample
test
CHANGED
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@@ -13,3 +13,109 @@
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13
13
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- document.getElementsByClassNameでHTMLCollectionで受けた上で、ループ処理で各HTMLElementに対して個別にaddEventListenerする
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- そもそもnameがわかっているのだから最初からnameをつかって処理
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# sample
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１番上の例
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```javascript
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document.addEventListener('click', function(e) {
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26
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27
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var a = 10;
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28
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29
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var b = 4;
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30
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31
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var ans = 0;
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32
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33
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var t=e.target;
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34
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35
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if(t.nodeName=="INPUT" && t.type=="button"){
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36
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switch (t.name) {
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38
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case "addition":
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40
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41
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ans = a + b;
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42
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break;
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45
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case "subtraction":
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46
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ans = a - b;
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48
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49
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break;
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50
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51
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case "multiplication":
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52
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53
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ans = a * b;
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54
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55
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break;
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56
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case "division":
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58
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ans = a / b;
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60
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61
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break;
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case "remainder":
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64
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ans = a % b;
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66
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break;
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default:
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70
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ans = "ERROR";
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break;
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}
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alert("答えは" + ans + "です");
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}
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80
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81
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});
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82
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83
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```
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85
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```HTML
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86
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87
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<form>
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88
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89
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<h1>変換の演算</h1>
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<p>a=10、b=4について、<br>
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変数「a」と「b」の計算結果を表示します。</p>
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<p>
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<input type="button" value="足し算" name="addition" class="buttons">
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<input type="button" value="引き算" name="subtraction" class="buttons">
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<input type="button" value="掛け算" name="multiplication" class="buttons">
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<input type="button" value="割り算" name="division" class="buttons">
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<input type="button" value="余り" name="remainder" class="buttons">
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<input type="button" value="ダミー" name="other" class="buttons">
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109
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</p>
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<br>
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112
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<p><input type="button" value="次へ" name="next" onClick="location.href='http://localhost/question09.html'" style="cursor:pointer;"></p>
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<p><input type="button" value="戻る" name="previous" onClick="location.href='http://localhost/question07.html'" style="cursor:pointer;"></p>
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</form>
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120
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121
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```
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1
追記
test
CHANGED
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@@ -6,8 +6,10 @@
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6
6
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7
7
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8
8
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9
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-
考え方は
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9
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考え方は３つ
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10
10
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11
11
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- document.addEventLitenerでdocumentにつけてその中でタグ名やnameで限定して処理をつける
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12
12
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13
13
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- document.getElementsByClassNameでHTMLCollectionで受けた上で、ループ処理で各HTMLElementに対して個別にaddEventListenerする
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14
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+
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15
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+
- そもそもnameがわかっているのだから最初からnameをつかって処理
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