如何为select中的选项创建？

How can I create if for option in select? The code works, it is necessary to code only worked for option = 5

如何选择select中的选项?代码有效,代码只能用于option = 5

<select id="select<?php echo $product['id_product'];?>" name="status_id" class="form-control" onchange="changeFunction(<?php echo $product['id_product'];?>)">
    <?php foreach ($statuses as $status) { ?>
        <option id="option<?php echo $product['id_product'];?>" value="<?php echo $status['id_product_status'];?>"
            <?php if ($status['id_product_status'] == $product['id_product_status']) { ?> selected="selected"<?php } ?>>
            <?php echo $status['name_product_status']; ?>
            </option>
        <?php } ?>
        <textarea id="onchange<?php echo $product['id_product'];?>" style="visibility: hidden" "></textarea>
</select>

function changeFunction(item) {  
    if ($("#option" + item).val == 5) {
        var selectOption = document.querySelector("#onchange" + item);
        selectOption.setAttribute('style', 'visibility: visible');
    }
}

2 个解决方案

#1

Do like this, though you don't need to pass "item" as parameter to achieve this. When you select an option, a change event is triggered on select. So you can bind a change event for this particular requirement. Upto you.

这样做,虽然你不需要传递“item”作为参数来实现这一点。选择选项时,会在选择时触发更改事件。因此,您可以为此特定要求绑定更改事件。由你决定。

function changeFunction(item){

     if($("#select"+item).val() == 5) {

         var selectOption = $("select option:selected");
         selectOption.setAttribute('style', 'visibility: visible');
      }
  }

2 个解决方案

#1

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