根据选择下拉列表显示或隐藏多个字段-jQuery [英] Displaying or hiding multiple fields based on selection dropdown - jquery

问题描述

我有一个包含下拉菜单的表格.根据下拉菜单中的选择，应显示或隐藏多个字段. 我编写的jquery函数仅适用于一个字段.如果我在下拉菜单中仅选择否"，则其余部分将保持隐藏. 我不太明白为什么. 我可以通过为每个字段id赋予另一个名称(例如showing1，showing2，...)并在函数中引用此id来解决此问题，但这需要重复很多.

I have a form containing a dropdown. Depending on the selection made in the dropdown, multiple fields should appear or hide. The jquery function, I have written, works only for one fields. If I select no in the dropdown only the title what is hidden the rest stays. I don't quite understand why. I could solve this by giving each field id another name (for example showing1, showing2, ...) and refer to this id in the function but that is a lot of repetition.

没有更好的方法吗?

链接到小提琴.

感谢您的输入.

## jQuery

$(document).ready(function(){
    $('#showing').hide();
    $('#condition').change(
        function(){
            if(this.value == "yes"){
                $('#showing').show();
            }
            else {
                $('#showing').hide();
            }
        }
    )
});

### Part of the form
    <div class="col-4"> 
                    <div class="d-flex">                    
                        <div class="flex-fill p-2">
                        <select name="playing" class="form-control" id="condition" required>
                                <option value="yes">Yes</option>
                                <option value="no">No</option>
                            </select>
                        </div>
                    </div> 
                </div>
            </div> 
            <div class="row">
                <div class="col-2">
                    <div class="d-flex">
                        <div class="p-1">
                            <label class="p-2" for="what" id="showing" >What</label>
                        </div> 
                    </div>
                </div> 
                <div class="col-4"> 
                    <div class="d-flex">                       
                        <div class="flex-fill p-2">
                            <input  id="showing"
                                    type="text" 
                                    class="form-control input-text" 
                                    name="wat" 
                            >
                        </div>
                    </div> 
                </div>
                <div class="col-2">
                    <div class="d-flex">
                        <div class="p-1">
                        <label class="p-2" for="type" id="showing" >Type</label>
                        </div>
                    </div>
                </div>
                <div class="col-4"> 
                    <div class="d-flex">   

推荐答案

首先，您应该从元素中删除ID正在显示"，并添加一个类名正在显示"，或者可以将此类添加到所有这些元素的父元素中.其次，您应该将ID更改为jquery中的class.而且我认为您没有添加加载jquery的脚本.

first, you should remove id "showing" from elements and add a class name "showing" or you can add this class to the parent element of all these elements. second, you should change your id to class in jquery. and I think you didn't add the script that loads jquery.

修改后的代码:

 $(document).ready(function(){
        $('.showing').hide();
        $('#condition').change(
            function(){
                if(this.value == "yes"){
                    $('.showing').show();
                }
                else {
                    $('.showing').hide();
                }
            }
        )
    });

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-4"> 
                        <div class="d-flex">                    
                            <div class="flex-fill p-2">
                            <select name="playing" class="form-control" id="condition" required>
                                    <option value="no">No</option>
                                    <option value="yes">Yes</option>
                                </select>
                            </div>
                        </div> 
                    </div>
                
 <div class="row">
                    <div class="col-2">
                        <div class="d-flex">
                            <div class="p-1">
                                <label class="p-2 showing" for="what">What</label>
                            </div> 
                        </div>
                    </div> 
                    <div class="col-4"> 
                        <div class="d-flex">                       
                            <div class="flex-fill p-2">
                                <input
                                        type="text" 
                                        class="form-control input-text showing" 
                                        name="wat" 
                                >
                            </div>
                        </div> 
                    </div>
                    <div class="col-2">
                        <div class="d-flex">
                            <div class="p-1">
                            <label class="p-2 showing" for="type">Type</label>
                            </div>
                        </div>
                    </div>
                    <div class="col-4"> 
                        <div class="d-flex">   
                            <div class="flex-fill p-2">
                                <input
                                        type="text" 
                                        class="form-control input-text showing" 
                                        name="type" 
                                >
                            </div>
                        </div> 
                    </div>     
                </div>

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