无法选择下拉列表值，选择每个下拉列表后如何显示动态字段？

Question

我有一个名为添加合作伙伴的按钮。 当您单击此按钮时，它将显示类似这样的动态行。

显示行之后，我首先单击选择Dropbox，然后选择Bank two 。

现在注意这里，如果我单击添加银行，那么“第一选择”下拉列表将自动填充第一行选择的值。 我的意思是我选择了第二Bank two然后将选择Bank two Bank two 。

如果我从第一行将其从Bank two更改为Bank three ，则它还将在第一个选择下拉列表的第二行中将更改。 例如

上述情况对我来说是完美的。 没有问题。

现在让我们谈谈这个问题。 如果再次单击Add partner按钮，它将显示ID号为3的新行。

现在，在ID 3上，我无法从下拉菜单中更改Bank three 。 我必须在每个ID上执行上述方案。 这是我的第一个问题。

我的第二个问题是关于状态下拉列表的。 每个选项都有一个不同的字段。 我的意思是，如果我选择Status one那么将显示一个输入字段。 这样的事情。

现在，如果用户选择状态，则每次必须显示该字段。 例如。 我单击添加银行并选择状态，但它删除了第一句话。

我的预期输出是

让我知道是否需要更多解释。 您能帮我解决这个问题吗？

 $(document).on('change', '.fileStatus', function() { var fileStatus = $('.fileStatus option:selected').val(); $('.fileStatus').val(fileStatus); }) $(document).ready(function() { // $('.fileStatus').on('change', '.fileStatus', function(){ var max_fields = 20; //maximum input boxes allowed var wrapper = $(".dynamicform"); //Fields wrapper var add_button = $(".click_partner"); //Add button ID var x = 1; //initlal text box count a = 1; $(add_button).click(function(e) { //on add input button click e.preventDefault(); if (x < max_fields) { //max input box allowed x++; //text box increment a++; //$("input[id^=medication_name]").focus(); $(wrapper).append('<div class="clearfix"></div><div class=" custom_fields medication_info" data-id="' + inner(a, 2) + '"><div class=" row"><div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 "><div class="label" id="unique">ID ' + x + ':</div></div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><input type="text" name="order[]" value="user-10-' + inner(a, 2) + '" class="form-control"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control fileStatus"><option disabled="" selected>Choose</option> <option value="1">Bank one</option><option value="2">Bank two</option><option value="3">Bank three</option></select></div> </div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><a href="#" class="new_add_bank bankLink" id="' + x + '">Add Bank</a> <div class="form-group"><select name="parner[]" class="form-control"><option disabled="" selected>Choose</option> <option value="">Bank one</option><option value="">Bank two</option><option value="">Bank Three</option></select></div> </div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control pp_fileStatus"><option disabled="" selected>Status</option> <option value="1">Status one</option><option value="2">Status two</option><option value="3">Status Three</option></select></div></div> <div class="i-imgset remove_field"><img src="http://www.clker.com/cliparts/I/R/h/v/h/g/remove-icon-md.png" alt="remove"> </div></div></div>'); } }); $(wrapper).on("click", ".remove_field", function(e) { //user click on remove text e.preventDefault(); $(this).find('.click_partner').closest('.custom_fields').remove(); x++; }); $(wrapper).on('click', '.new_add_bank', function() { var innercoutner = $(this).closest('.medication_info').find('.medication_info').children('.row').length + 1; var c = $(this).closest('.medication_info').attr('data-id'); var fileStatus = $('.fileStatus:last option:selected').val(); // alert(fileStatus); $(this).closest('.row').append('<div class="clearfix"></div><div class=" medication_info"><div class=" row"><div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 "></div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><input type="text" name="order[]" value="user-10-' + c + '-' + inner(innercoutner, 2) + '" class="form-control"></div></div><div class="col-xl-3 col-lg-3 col-md-3 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control fileStatus"><option disabled="" selected>Choose</option> <option value="1">Bank one</option><option value="2">Bnak two</option><option value="3">Bank three</option></select></div> </div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control"><option disabled="" selected>Choose</option> <option value="">Bank one</option><option value="">Bank two</option><option value="">Bank three</option></select></div> </div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control pp_fileStatus"><option disabled="" selected>Status</option> <option value="1">Status one</option><option value="2">Status two</option><option value="3">Status Three</option></select></div></div><div class="i-imgset remove_field"> <img src="http://www.clker.com/cliparts/I/R/h/v/h/g/remove-icon-md.png" alt="remove"> </div></div></div>'); $('.fileStatus:last').val(fileStatus); }); $(wrapper).on("click", ".remove_field", function(e) { //user click on remove text e.preventDefault(); $(this).closest('.medication_info').remove(); x--; }); // increment============================================== function inner(k, width, t) { t = t || '0'; k = k + ''; /* return n.length >= ? n : new Array(w widthidth - n.length + 1).join(z) + n; */ return k.length >= width ? k : new Array(width - k.length + 1).join(t) + k; } }); $(document).on('change', '.pp_fileStatus', function(event) { //alert($(this).val()); $(".input-wrapper").remove(); if (($('.pp_fileStatus').val() == '1')) { $(event.target).closest('.row').append('<div class="col-xl-3 col-lg-3 col-md-3 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Remark</label><input type="text" name="remark[]" class="form-control"></div></div>'); } else if (($('.pp_fileStatus').val() == '2')) { $(event.target).closest('.row').append('<div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Date</label><input type="text" name="reasonDate[]" class="form-control datetimepicker"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Remark</label><input type="text" name="remark[]" class="form-control"></div></div>'); } else { $(event.target).closest('.row').append('<div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Time</label><input type="text" name="time[]" class="form-control"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Reason</label><input type="text" name="reason[]" class="form-control"></div></div>'); } }); 

 .i-imgset { width: 30px; } .i-imgset img { width: 100%; } .bankLink { position: absolute; top: -24px; font-size: 14px; } 

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <div class="container"> <div class="click_partner"> <input type="button" name="parner" value="Add Partner"></div> <div class="dynamicform"> </div> </div> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script> 

Answer 1

您有两个主要问题。

第一个： .pp_fileStatus上的委托事件是错误的，因为您使用全局选择器而不是本地选择器。 例如：

$('.pp_fileStatus').val()

代替：

$(this).val()

除了.fileStatus上的委托事件外，第二个问题也遇到同样的问题。 新的是：

$(document).on('change', '.fileStatus', function() {
    var fileStatus = $(this).find('option:selected').val();
    $(this).closest('.row').find('.medication_info .fileStatus').val(fileStatus);
})

 var max_fields = 20; //maximum input boxes allowed var wrapper = $(".dynamicform"); //Fields wrapper var add_button = $(".click_partner"); //Add button ID var x = 1; //initlal text box count a = 1; $(add_button).click(function(e) { //on add input button click e.preventDefault(); if (x < max_fields) { //max input box allowed x++; //text box increment a++; //$("input[id^=medication_name]").focus(); $(wrapper).append('<div class="clearfix"></div><div class=" custom_fields medication_info" data-id="' + inner(a, 2) + '"><div class=" row"><div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 "><div class="label" id="unique">ID ' + x + ':</div></div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><input type="text" name="order[]" value="user-10-' + inner(a, 2) + '" class="form-control"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control fileStatus"><option disabled="" selected>Choose</option> <option value="1">Bank one</option><option value="2">Bank two</option><option value="3">Bank three</option></select></div> </div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><a href="#" class="new_add_bank bankLink" id="' + x + '">Add Bank</a> <div class="form-group"><select name="parner[]" class="form-control"><option disabled="" selected>Choose</option> <option value="">Bank one</option><option value="">Bank two</option><option value="">Bank Three</option></select></div> </div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control pp_fileStatus"><option disabled="" selected>Status</option> <option value="1">Status one</option><option value="2">Status two</option><option value="3">Status Three</option></select></div></div> <div class="i-imgset remove_field"><img src="http://www.clker.com/cliparts/I/R/h/v/h/g/remove-icon-md.png" alt="remove"> </div></div></div>'); } }); $(wrapper).on("click", ".remove_field", function(e) { //user click on remove text e.preventDefault(); $(this).find('.click_partner').closest('.custom_fields').remove(); x++; }); $(wrapper).on('click', '.new_add_bank', function() { var innercoutner = $(this).closest('.medication_info').find('.medication_info').children('.row').length + 1; var c = $(this).closest('.medication_info').attr('data-id'); var fileStatus = $('.fileStatus:last option:selected').val(); // alert(fileStatus); $(this).closest('.row').append('<div class="clearfix"></div><div class=" medication_info"><div class=" row"><div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 "></div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><input type="text" name="order[]" value="user-10-' + c + '-' + inner(innercoutner, 2) + '" class="form-control"></div></div><div class="col-xl-3 col-lg-3 col-md-3 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control fileStatus"><option disabled="" selected>Choose</option> <option value="1">Bank one</option><option value="2">Bnak two</option><option value="3">Bank three</option></select></div> </div> <div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control"><option disabled="" selected>Choose</option> <option value="">Bank one</option><option value="">Bank two</option><option value="">Bank three</option></select></div> </div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 "><div class="form-group"><select name="parner[]" class="form-control pp_fileStatus"><option disabled="" selected>Status</option> <option value="1">Status one</option><option value="2">Status two</option><option value="3">Status Three</option></select></div></div><div class="i-imgset remove_field"> <img src="http://www.clker.com/cliparts/I/R/h/v/h/g/remove-icon-md.png" alt="remove"> </div></div></div>'); $('.fileStatus:last').val(fileStatus); }); $(wrapper).on("click", ".remove_field", function(e) { //user click on remove text e.preventDefault(); $(this).closest('.medication_info').remove(); x--; }); // increment============================================== function inner(k, width, t) { t = t || '0'; k = k + ''; /* return n.length >= ? n : new Array(w widthidth - n.length + 1).join(z) + n; */ return k.length >= width ? k : new Array(width - k.length + 1).join(t) + k; } $(document).on('change', '.fileStatus', function() { var fileStatus = $(this).find('option:selected').val(); $(this).closest('.row').find('.medication_info .fileStatus').val(fileStatus); }) $(document).on('change', '.pp_fileStatus', function(event) { //alert($(this).val()); var operation = 'append'; var ele = $(this).closest('.row'); if ($(this).closest('.row').find('.medication_info').length != 0) { operation = 'after'; ele = ele.find('.i-imgset:first'); ele.siblings(".input-wrapper").remove(); } else { ele.find(".input-wrapper").remove(); } if ($(this).val() == '1') { ele[operation]('<div class="col-xl-3 col-lg-3 col-md-3 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Remark</label><input type="text" name="remark[]" class="form-control"></div></div>'); } else if ($(this).val() == '2') { ele[operation]('<div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Date</label><input type="text" name="reasonDate[]" class="form-control datetimepicker"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Remark</label><input type="text" name="remark[]" class="form-control"></div></div>'); } else { ele[operation]('<div class="col-xl-1 col-lg-1 col-md-1 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Time</label><input type="text" name="time[]" class="form-control"></div></div><div class="col-xl-2 col-lg-2 col-md-2 col-sm-12 col-xs-12 input-wrapper"><div class="form-group"> <label>Reason</label><input type="text" name="reason[]" class="form-control"></div></div>'); } }); 

 .i-imgset { width: 30px; } .i-imgset img { width: 100%; } .bankLink { position: absolute; top: -24px; font-size: 14px; } 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script> <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css"> <div class="container"> <div class="click_partner"> <input type="button" name="parner" value="Add Partner"></div> <div class="dynamicform"> </div> </div>