回答編集履歴
1
コードブロックの言語の変更(html→javascript)
test
CHANGED
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@@ -1,435 +1,435 @@
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```javascript
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for (var i = 0; i < $(".buy_itemu_menu").length; i++) {
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var item_price = $(".buy_itemu_menu").eq(i).data(
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"price");
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var item_select = $(".buy_itemu_menu").eq(i).next(
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"select").find("option:selected").data("num");
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hairetu.push(item_price *item_select);
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var a = $(".buy_itemu_menu");
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console.log(a);
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var b = a.eq(i);
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console.log(b);
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var c = b.next("select");
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console.log(c);
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var d = c.find("option:selected");
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console.log(d);
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var e = d.data("num")； console.log(e);
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}
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```
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for文の中に記載して実行してみました。
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chromeのデベロッパーツールでconsole.logで中身を確認してみました。
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中身を確認してみて
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$(".buy_itemu_menu") クラスの. eq(i) 何番目の .next("select")
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select要素の .find("option:selected") 選択されたoptionの .data("num"); データ属性の要素 だと理解しました。
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>jquery</title>
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<link rel="stylesheet" href="style1.css">
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</head>
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<body>
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<div id="wrapper">
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<h1 id="h1">フォーム自動計算</h1>
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<form class="form-horizon" method="post" action="">
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<p>ご希望の項目の数を選択してください</p>
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<div class="form-box">
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<p class="buy_itemu_menu" data-price="2500">
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人力飛行機 <span class="kakaku">(定価 2,500円 / 会員価格 2,300円 )</span>
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</p>
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<select name="人力飛行機数量" style="width: 150px;">
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<option data-num="0" value="0個" selected>0個</option>
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<option data-num="1" value="1個">1個</option>
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<option data-num="2" value="2個">2個</option>
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<option data-num="3" value="3個">3個</option>
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</select>
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</div>
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<div class="form-box">
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<p class="buy_itemu_menu" data-price="1000">
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ラーメン <span class="kakaku">(定価 1,000円 / 会員価格 8,00円 )</span>
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</p>
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<select name="人力飛行機数量" style="width: 150px;">
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<option data-num="0" value="0個" selected>0個</option>
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<option data-num="1" value="1個">1個</option>
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<option data-num="2" value="2個">2個</option>
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<option data-num="3" value="3個">3個</option>
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</select>
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</div>
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<div class="form-box">
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<p class="buy_itemu_menu" data-price="10000">
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時計 <span class="kakaku">(定価 10,000円 / 会員価格 9,500円 )</span>
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</p>
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<select name="人力飛行機数量" style="width: 150px;">
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<option data-num="0" value="0個" selected>0個</option>
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<option data-num="1" value="1個">1個</option>
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<option data-num="2" value="2個">2個</option>
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<option data-num="3" value="3個">3個</option>
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</select>
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</div>
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<hr>
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<div class="form-box">
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<label for="item_price_total">小計:</label> <input
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id="item_price_total" name="小計" value="0円" readonly>
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</div>
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<div class="form-box">
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<label for="postage_price">送料：</label> <input id="postage_price"
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class="" name="送料" value="300円" readonly> <span>※1発送につき300円（3,000円以上のご購入で送料無料）</span>
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</div>
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<div class="form-box">
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<label for="total_price">合計金額：</label> <input id="total_price"
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class="" name="合計金額" value="300円"
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style="font-size: 150%; font-weight: bold; display: inline-block;"
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readonly>
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<div>
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<label for="kaiinnkakaku">
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<input id="kaiinnkakaku" type="checkbox" name="会員価格" value="チェック有">
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会員の方はチェックしてください。会員価格に変更されます。
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</label>
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</div>
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</div>
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<div class="submit-form">
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<button id="form-check" type="submit" class="btn">送信(されません)</button>
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</div>
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</form>
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</div>
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<footer id = "footer">
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<small class="copyright">footer</small>
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</footer>
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<script src="//code.jquery.com/jquery-3.4.1.min.js"></script>
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<script>
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$(function() {
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$("select,#kaiinnkakaku").change(function(){
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var hairetu = [];
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for (var i = 0; i < $(".buy_itemu_menu").length; i++) {
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var item_price = $(".buy_itemu_menu").eq(i).data(
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"price");
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var item_select = $(".buy_itemu_menu").eq(i).next(
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"select").find("option:selected").data("num");
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if(document.getElementById("kaiinnkakaku").checked == true){
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if(item_price == 10000){
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var item_price = 9500
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}else if(item_price == 2500){
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var item_price = 2300
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}else if (item_price == 1000)
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var item_price = 800
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}
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if(item_select > 0){
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hairetu.push(item_price * item_select);
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}else{
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0;
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}
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/* var a = $(".buy_itemu_menu");
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console.log(a);
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var b = a.eq(i);
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console.log(b);
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var c = b.next("select");
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console.log(c);
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var d = c.find("option:selected");
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console.log(d);
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var e = d.data("num");
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+
|
|
375
|
+
console.log(e);
|
|
376
|
+
|
|
377
|
+
*/
|
|
378
|
+
|
|
379
|
+
}
|
|
380
|
+
|
|
381
|
+
|
|
382
|
+
|
|
383
|
+
var total = 0;
|
|
384
|
+
|
|
385
|
+
for (var j = 0; j < hairetu.length; j++) {
|
|
386
|
+
|
|
387
|
+
total += hairetu[j];
|
|
388
|
+
|
|
389
|
+
|
|
390
|
+
|
|
391
|
+
}
|
|
392
|
+
|
|
393
|
+
|
|
394
|
+
|
|
395
|
+
if(total >= 3000){
|
|
396
|
+
|
|
397
|
+
var postage = 0;
|
|
398
|
+
|
|
399
|
+
|
|
400
|
+
|
|
401
|
+
}else{
|
|
402
|
+
|
|
403
|
+
var postage = 300;
|
|
404
|
+
|
|
405
|
+
|
|
406
|
+
|
|
407
|
+
}
|
|
408
|
+
|
|
409
|
+
|
|
410
|
+
|
|
411
|
+
$("#item_price_total").val(total + "円");
|
|
412
|
+
|
|
413
|
+
$("#postage_price").val(postage + "円");
|
|
414
|
+
|
|
415
|
+
$("#total_price").val((total + postage) + "円");
|
|
416
|
+
|
|
417
|
+
});
|
|
418
|
+
|
|
419
|
+
|
|
420
|
+
|
|
421
|
+
});
|
|
422
|
+
|
|
423
|
+
</script>
|
|
424
|
+
|
|
425
|
+
</body>
|
|
426
|
+
|
|
427
|
+
</html>
|
|
428
|
+
|
|
429
|
+
|
|
430
|
+
|
|
53
431
|
```
|
|
54
432
|
|
|
55
|
-
|
|
56
|
-
|
|
57
|
-
for文の中に記載して実行してみました。
|
|
58
|
-
|
|
59
|
-
chromeのデベロッパーツールでconsole.logで中身を確認してみました。
|
|
60
|
-
|
|
61
|
-
|
|
62
|
-
|
|
63
|
-
中身を確認してみて
|
|
64
|
-
|
|
65
|
-
$(".buy_itemu_menu") クラスの. eq(i) 何番目の .next("select")
|
|
66
|
-
|
|
67
|
-
select要素の .find("option:selected") 選択されたoptionの .data("num"); データ属性の要素 だと理解しました。
|
|
68
|
-
|
|
69
|
-
|
|
70
|
-
|
|
71
|
-
|
|
72
|
-
|
|
73
|
-
|
|
74
|
-
|
|
75
|
-
```html
|
|
76
|
-
|
|
77
|
-
<!DOCTYPE html>
|
|
78
|
-
|
|
79
|
-
<html>
|
|
80
|
-
|
|
81
|
-
<head>
|
|
82
|
-
|
|
83
|
-
<meta charset="utf-8">
|
|
84
|
-
|
|
85
|
-
<title>jquery</title>
|
|
86
|
-
|
|
87
|
-
<link rel="stylesheet" href="style1.css">
|
|
88
|
-
|
|
89
|
-
</head>
|
|
90
|
-
|
|
91
|
-
<body>
|
|
92
|
-
|
|
93
|
-
|
|
94
|
-
|
|
95
|
-
<div id="wrapper">
|
|
96
|
-
|
|
97
|
-
|
|
98
|
-
|
|
99
|
-
<h1 id="h1">フォーム自動計算</h1>
|
|
100
|
-
|
|
101
|
-
|
|
102
|
-
|
|
103
|
-
|
|
104
|
-
|
|
105
|
-
<form class="form-horizon" method="post" action="">
|
|
106
|
-
|
|
107
|
-
<p>ご希望の項目の数を選択してください</p>
|
|
108
|
-
|
|
109
|
-
|
|
110
|
-
|
|
111
|
-
<div class="form-box">
|
|
112
|
-
|
|
113
|
-
|
|
114
|
-
|
|
115
|
-
<p class="buy_itemu_menu" data-price="2500">
|
|
116
|
-
|
|
117
|
-
人力飛行機 <span class="kakaku">(定価 2,500円 / 会員価格 2,300円 )</span>
|
|
118
|
-
|
|
119
|
-
</p>
|
|
120
|
-
|
|
121
|
-
|
|
122
|
-
|
|
123
|
-
<select name="人力飛行機数量" style="width: 150px;">
|
|
124
|
-
|
|
125
|
-
|
|
126
|
-
|
|
127
|
-
<option data-num="0" value="0個" selected>0個</option>
|
|
128
|
-
|
|
129
|
-
<option data-num="1" value="1個">1個</option>
|
|
130
|
-
|
|
131
|
-
<option data-num="2" value="2個">2個</option>
|
|
132
|
-
|
|
133
|
-
<option data-num="3" value="3個">3個</option>
|
|
134
|
-
|
|
135
|
-
</select>
|
|
136
|
-
|
|
137
|
-
</div>
|
|
138
|
-
|
|
139
|
-
|
|
140
|
-
|
|
141
|
-
<div class="form-box">
|
|
142
|
-
|
|
143
|
-
|
|
144
|
-
|
|
145
|
-
<p class="buy_itemu_menu" data-price="1000">
|
|
146
|
-
|
|
147
|
-
ラーメン <span class="kakaku">(定価 1,000円 / 会員価格 8,00円 )</span>
|
|
148
|
-
|
|
149
|
-
</p>
|
|
150
|
-
|
|
151
|
-
|
|
152
|
-
|
|
153
|
-
<select name="人力飛行機数量" style="width: 150px;">
|
|
154
|
-
|
|
155
|
-
|
|
156
|
-
|
|
157
|
-
<option data-num="0" value="0個" selected>0個</option>
|
|
158
|
-
|
|
159
|
-
<option data-num="1" value="1個">1個</option>
|
|
160
|
-
|
|
161
|
-
<option data-num="2" value="2個">2個</option>
|
|
162
|
-
|
|
163
|
-
<option data-num="3" value="3個">3個</option>
|
|
164
|
-
|
|
165
|
-
</select>
|
|
166
|
-
|
|
167
|
-
</div>
|
|
168
|
-
|
|
169
|
-
|
|
170
|
-
|
|
171
|
-
|
|
172
|
-
|
|
173
|
-
<div class="form-box">
|
|
174
|
-
|
|
175
|
-
|
|
176
|
-
|
|
177
|
-
<p class="buy_itemu_menu" data-price="10000">
|
|
178
|
-
|
|
179
|
-
時計 <span class="kakaku">(定価 10,000円 / 会員価格 9,500円 )</span>
|
|
180
|
-
|
|
181
|
-
</p>
|
|
182
|
-
|
|
183
|
-
|
|
184
|
-
|
|
185
|
-
<select name="人力飛行機数量" style="width: 150px;">
|
|
186
|
-
|
|
187
|
-
|
|
188
|
-
|
|
189
|
-
<option data-num="0" value="0個" selected>0個</option>
|
|
190
|
-
|
|
191
|
-
<option data-num="1" value="1個">1個</option>
|
|
192
|
-
|
|
193
|
-
<option data-num="2" value="2個">2個</option>
|
|
194
|
-
|
|
195
|
-
<option data-num="3" value="3個">3個</option>
|
|
196
|
-
|
|
197
|
-
</select>
|
|
198
|
-
|
|
199
|
-
</div>
|
|
200
|
-
|
|
201
|
-
|
|
202
|
-
|
|
203
|
-
|
|
204
|
-
|
|
205
|
-
<hr>
|
|
206
|
-
|
|
207
|
-
<div class="form-box">
|
|
208
|
-
|
|
209
|
-
<label for="item_price_total">小計:</label> <input
|
|
210
|
-
|
|
211
|
-
id="item_price_total" name="小計" value="0円" readonly>
|
|
212
|
-
|
|
213
|
-
</div>
|
|
214
|
-
|
|
215
|
-
|
|
216
|
-
|
|
217
|
-
<div class="form-box">
|
|
218
|
-
|
|
219
|
-
<label for="postage_price">送料：</label> <input id="postage_price"
|
|
220
|
-
|
|
221
|
-
class="" name="送料" value="300円" readonly> <span>※1発送につき300円（3,000円以上のご購入で送料無料）</span>
|
|
222
|
-
|
|
223
|
-
</div>
|
|
224
|
-
|
|
225
|
-
|
|
226
|
-
|
|
227
|
-
|
|
228
|
-
|
|
229
|
-
<div class="form-box">
|
|
230
|
-
|
|
231
|
-
<label for="total_price">合計金額：</label> <input id="total_price"
|
|
232
|
-
|
|
233
|
-
class="" name="合計金額" value="300円"
|
|
234
|
-
|
|
235
|
-
style="font-size: 150%; font-weight: bold; display: inline-block;"
|
|
236
|
-
|
|
237
|
-
readonly>
|
|
238
|
-
|
|
239
|
-
<div>
|
|
240
|
-
|
|
241
|
-
<label for="kaiinnkakaku">
|
|
242
|
-
|
|
243
|
-
<input id="kaiinnkakaku" type="checkbox" name="会員価格" value="チェック有">
|
|
244
|
-
|
|
245
|
-
会員の方はチェックしてください。会員価格に変更されます。
|
|
246
|
-
|
|
247
|
-
</label>
|
|
248
|
-
|
|
249
|
-
|
|
250
|
-
|
|
251
|
-
</div>
|
|
252
|
-
|
|
253
|
-
|
|
254
|
-
|
|
255
|
-
</div>
|
|
256
|
-
|
|
257
|
-
|
|
258
|
-
|
|
259
|
-
<div class="submit-form">
|
|
260
|
-
|
|
261
|
-
<button id="form-check" type="submit" class="btn">送信(されません)</button>
|
|
262
|
-
|
|
263
|
-
</div>
|
|
264
|
-
|
|
265
|
-
</form>
|
|
266
|
-
|
|
267
|
-
|
|
268
|
-
|
|
269
|
-
|
|
270
|
-
|
|
271
|
-
</div>
|
|
272
|
-
|
|
273
|
-
<footer id = "footer">
|
|
274
|
-
|
|
275
|
-
<small class="copyright">footer</small>
|
|
276
|
-
|
|
277
|
-
</footer>
|
|
278
|
-
|
|
279
|
-
|
|
280
|
-
|
|
281
|
-
|
|
282
|
-
|
|
283
|
-
|
|
284
|
-
|
|
285
|
-
<script src="//code.jquery.com/jquery-3.4.1.min.js"></script>
|
|
286
|
-
|
|
287
|
-
<script>
|
|
288
|
-
|
|
289
|
-
|
|
290
|
-
|
|
291
|
-
$(function() {
|
|
292
|
-
|
|
293
|
-
$("select,#kaiinnkakaku").change(function(){
|
|
294
|
-
|
|
295
|
-
var hairetu = [];
|
|
296
|
-
|
|
297
|
-
for (var i = 0; i < $(".buy_itemu_menu").length; i++) {
|
|
298
|
-
|
|
299
|
-
|
|
300
|
-
|
|
301
|
-
var item_price = $(".buy_itemu_menu").eq(i).data(
|
|
302
|
-
|
|
303
|
-
"price");
|
|
304
|
-
|
|
305
|
-
var item_select = $(".buy_itemu_menu").eq(i).next(
|
|
306
|
-
|
|
307
|
-
"select").find("option:selected").data("num");
|
|
308
|
-
|
|
309
|
-
|
|
310
|
-
|
|
311
|
-
if(document.getElementById("kaiinnkakaku").checked == true){
|
|
312
|
-
|
|
313
|
-
if(item_price == 10000){
|
|
314
|
-
|
|
315
|
-
|
|
316
|
-
|
|
317
|
-
var item_price = 9500
|
|
318
|
-
|
|
319
|
-
}else if(item_price == 2500){
|
|
320
|
-
|
|
321
|
-
var item_price = 2300
|
|
322
|
-
|
|
323
|
-
}else if (item_price == 1000)
|
|
324
|
-
|
|
325
|
-
var item_price = 800
|
|
326
|
-
|
|
327
|
-
}
|
|
328
|
-
|
|
329
|
-
|
|
330
|
-
|
|
331
|
-
if(item_select > 0){
|
|
332
|
-
|
|
333
|
-
|
|
334
|
-
|
|
335
|
-
hairetu.push(item_price * item_select);
|
|
336
|
-
|
|
337
|
-
|
|
338
|
-
|
|
339
|
-
}else{
|
|
340
|
-
|
|
341
|
-
0;
|
|
342
|
-
|
|
343
|
-
}
|
|
344
|
-
|
|
345
|
-
|
|
346
|
-
|
|
347
|
-
|
|
348
|
-
|
|
349
|
-
/* var a = $(".buy_itemu_menu");
|
|
350
|
-
|
|
351
|
-
console.log(a);
|
|
352
|
-
|
|
353
|
-
|
|
354
|
-
|
|
355
|
-
var b = a.eq(i);
|
|
356
|
-
|
|
357
|
-
console.log(b);
|
|
358
|
-
|
|
359
|
-
|
|
360
|
-
|
|
361
|
-
var c = b.next("select");
|
|
362
|
-
|
|
363
|
-
console.log(c);
|
|
364
|
-
|
|
365
|
-
|
|
366
|
-
|
|
367
|
-
var d = c.find("option:selected");
|
|
368
|
-
|
|
369
|
-
console.log(d);
|
|
370
|
-
|
|
371
|
-
|
|
372
|
-
|
|
373
|
-
var e = d.data("num");
|
|
374
|
-
|
|
375
|
-
console.log(e);
|
|
376
|
-
|
|
377
|
-
*/
|
|
378
|
-
|
|
379
|
-
}
|
|
380
|
-
|
|
381
|
-
|
|
382
|
-
|
|
383
|
-
var total = 0;
|
|
384
|
-
|
|
385
|
-
for (var j = 0; j < hairetu.length; j++) {
|
|
386
|
-
|
|
387
|
-
total += hairetu[j];
|
|
388
|
-
|
|
389
|
-
|
|
390
|
-
|
|
391
|
-
}
|
|
392
|
-
|
|
393
|
-
|
|
394
|
-
|
|
395
|
-
if(total >= 3000){
|
|
396
|
-
|
|
397
|
-
var postage = 0;
|
|
398
|
-
|
|
399
|
-
|
|
400
|
-
|
|
401
|
-
}else{
|
|
402
|
-
|
|
403
|
-
var postage = 300;
|
|
404
|
-
|
|
405
|
-
|
|
406
|
-
|
|
407
|
-
}
|
|
408
|
-
|
|
409
|
-
|
|
410
|
-
|
|
411
|
-
$("#item_price_total").val(total + "円");
|
|
412
|
-
|
|
413
|
-
$("#postage_price").val(postage + "円");
|
|
414
|
-
|
|
415
|
-
$("#total_price").val((total + postage) + "円");
|
|
416
|
-
|
|
417
|
-
});
|
|
418
|
-
|
|
419
|
-
|
|
420
|
-
|
|
421
|
-
});
|
|
422
|
-
|
|
423
|
-
</script>
|
|
424
|
-
|
|
425
|
-
</body>
|
|
426
|
-
|
|
427
|
-
</html>
|
|
428
|
-
|
|
429
|
-
|
|
430
|
-
|
|
431
|
-
```
|
|
432
|
-
|
|
433
433
|
上記のコードでなんとか
|
|
434
434
|
|
|
435
435
|
jQueryの 選択された商品の合計を表示 することができました。
|