回答編集履歴
1
追記
test
CHANGED
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@@ -79,3 +79,155 @@
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79
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</html>
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```
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追記
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89
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```html
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<html>
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<form id="form" action="https://~~~~" class="form-inline" method="post">
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<input type="hidden" name="is_multiple_item" id="is_multiple_item" value="true" />
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<input type="hidden" name="items[0]id" id="id" value="60" />
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<input type="hidden" name="items[0]cart_item_type" value="single_product" />
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<div class="form-group">
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<select name="items[0]option_values[0][id]" id="option_values_0_id">
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<option value="415">テスト1</option>
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<option value="416">テスト2</option>
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<option value="417">テスト3</option>
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</select>
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</div>
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<div>個数
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<select name="items[0]quantity" id="quantity1" class="form-control custom_quantity">
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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</select>
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</div>
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<input type="hidden" name="items[1]cart_item_type" value="regular_course" />
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<input type="hidden" name="items[1]id" id="id1" value="16" />
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<input type="hidden" name="items[1]products[][variant_id]" value="" />
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<div class="form-group">
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<select name="items[1]option_values[1][id]" id="test">
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<option value="679">A</option>
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<option value="481">B</option>
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<option value="44">C</option>
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<option value="43">D</option>
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<option value="42">E</option>
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</select>
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</div>
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<div>個数
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<select name="items[1]quantity" id="quantity" class="form-control">
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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</select>
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</div>
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<button name="button" type="submit" class="btn btn-primary">購入する</button>
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<script>
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const input = document.getElementsByTagName("input")[5];
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const select = document.getElementById("test");
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input.value = select.value;
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console.log(input.value);
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select.addEventListener("change", () => {
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input.value = select.value;
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console.log(input.value);
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});
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</script>
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</form>
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</html>
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```
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