使用Javascript

Question

我正在处理一个应用程序，其中我有一些具有 选择下拉字段。 在卡片上，我编写了JavaScript逻辑，如果用户 在任何卡片上选择了妻子或丈夫作为选项 选择下拉列表，其他任何丈夫或妻子下拉列表字段 应该禁用。

问题是当我从任何卡中选择一个选项时，其他卡都不会禁用。 基本上我想当用户选择妻子或丈夫选项时 在任何卡上，其他卡上的所有其他丈夫或妻子选择都应 立即禁用。

我在控制台中收到此错误：

TypeError：document.querySelectorAll（...）。addEventListener不是函数

标记代码

<!-- Card 1 -->
<form method="POST" action="#" id="phase3">
        <input type="hidden" name="_token" id="token" value="{{ csrf_token() }}">
        <!-- Gender -->
        <div class="row registerRelationph3">
            <label class="fm-input"> Relation :</label>
            <select class="fm-input otherMenu" id="relation1" required>
                <option value="Husband"> Husband </option>
                <option value="Wife"> Wife </option>
                <option value="Son"> Son </option>
                <option value="Daughter"> Daughter </option>
            </select>
        </div>
        <!-- END -->

        <!-- DOb -->
        <div class="row">
        <label class="fm-input" style="font-size: 10px;"> Date Of Birth :</label>
        <input type="text" id="dob" class="fm-inputph3" placeholder="Date of Birth" value="" required>
        </div>
        <!-- END dob -->
            <button class="btn btn-lg" type="submit"> Save Details <i class="fa fa-check-circle" ></i></button>
</form>
<!-- End card 1 -->

<!-- Card 2-->
<form method="POST" action="#" id="phase3">
        <input type="hidden" name="_token" id="token" value="{{ csrf_token() }}">
        <!-- Gender -->
        <div class="row registerRelationph3">
            <label class="fm-input otherMenu"> Relation :</label>
            <select class="fm-input" id="relation1" required>
                <option value="Husband"> Husband </option>
                <option value="Wife"> Wife </option>
                <option value="Son"> Son </option>
                <option value="Daughter"> Daughter </option>
            </select>
        </div>
        <!-- END -->

        <!-- DOb -->
        <div class="row">
            <label class="fm-input" style="font-size: 10px;"> Date Of Birth :</label>
            <input type="text" id="dob" class="fm-inputph3" placeholder="Date of Birth" value="" required>
        </div>
        <!-- END dob -->
            <button class="btn btn-lg" type="submit"> Save Details <i class="fa fa-check-circle" ></i></button>
</form>
<!-- End card 2-->

<!-- Card 3-->
<form method="POST" action="#" id="phase3">
        <input type="hidden" name="_token" id="token" value="{{ csrf_token() }}">
        <!-- Gender -->
        <div class="row registerRelationph3">
            <label class="fm-input"> Relation :</label>
            <select class="fm-input otherMenu" id="relation1" required>
                <option value="Husband"> Husband </option>
                <option value="Wife"> Wife </option>
                <option value="Son"> Son </option>
                <option value="Daughter"> Daughter </option>
            </select>
        </div>
        <!-- END -->

        <!-- DOb -->
        <div class="row">
            <label class="fm-input" style="font-size: 10px;"> Date Of Birth :</label>
            <input type="text" id="dob" class="fm-inputph3" placeholder="Date of Birth" value="" required>
        </div>
        <!-- END dob -->
            <button class="btn btn-lg" type="submit"> Save Details <i class="fa fa-check-circle" ></i></button>
</form>
<!-- End card 3-->

JavaScript代码

document.querySelectorAll('.otherMenu').addEventListener('change', function() {
    var selectedOption = this.value;
    var selectWife = document.querySelectorAll('.otherMenu option[value="Wife"]');
    var selectHusband = document.querySelectorAll('.otherMenu option[value="Husband"]');
        selectWife.forEach(function(option) {
            option.disabled = selectedOption === 'Wife';
        });
        selectHusband.forEach(function(option) {
            option.disabled = selectedOption === 'Husband';
        });
});

Answer 1

我认为您无法在菜单列表中添加事件监听器 必须为每个菜单完成

var menus = document.querySelectorAll('.otherMenu');
for (let menu of menus) {
    menu.addEventListener('change', function () {
        var selectedOption = this.value;
        var selectWife = document.querySelectorAll('.otherMenu option[value="Wife"]');
        var selectHusband = document.querySelectorAll('.otherMenu option[value="Husband"]');
        selectWife.forEach(function (option) {
            option.disabled = selectedOption === 'Wife';
        });
        selectHusband.forEach(function (option) {
            option.disabled = selectedOption === 'Husband';
        });
    });
}