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How to prefill fields using jquery

Hi I'm trying to figure out how to fill all fields using ajax call, it successfully doing by selecting category, it loads all related sub_categories.
But sub_sub_category fields are empty. Only when I choose sub_category option it will load all sub_sub_categories, but I want all prefilled once category has been changed. I don't mind to leave like this, but problem is if I have only single sub_category I can not select any sub_sub_category even if they have any I tried to convert to function and call them but no success.
Code below:
<script>
$(document).ready(function() {
get_sub_sub_category();
$('select[name="category_id"]').on('change', function() {
var category_id = $(this).val();
if(category_id) {
$.ajax({
url: "{{ url('/category/sub-category/') }}/"+category_id,
type: "GET",
dataType: "json",
success: function(data) {
$('select[name="sub_sub_category_id"]').html('');
var d = $('select[name="sub_category_id"]').empty();
$.each(data, function(key, value) {
$('select[name="sub_category_id"]').append('<option value="'+ value.id +'">' + value.sub_category_name + '</option>');
});
get_sub_sub_category();
},
})
} else {
alert('danger');
}
});
function get_sub_sub_category() {
$('select[name="sub_category_id"]').on('load change', function () {
var sub_category_id = $(this).val();
if (sub_category_id) {
$.ajax({
url: "{{ url('/category/sub-sub-category/') }}/"+sub_category_id,
type: "GET",
dataType: "json",
success: function (data) {
var d = $('select[name="sub_sub_category_id"]').empty();
$.each(data, function (key, value) {
$('select[name="sub_sub_category_id"]').append('<option value="' + value.id + '">' + value.sub_sub_category_name + '</option>');
});
},
})
} else {
alert('danger');
}
});
}
});
</script>

You might want to consider the following.
$(function() {
$('select[name="category_id"]').on('change', function() {
var category_id = $(this).val();
if (category_id) {
$.ajax({
url: "{{ url('/category/sub-category/') }}/" + category_id,
type: "GET",
dataType: "json",
success: function(data) {
$('select[name="sub_sub_category_id"]').html('');
var d = $('select[name="sub_category_id"]').empty();
$.each(data, function(key, value) {
$('select[name="sub_category_id"]').append('<option value="' + value.id + '">' + value.sub_category_name + '</option>');
});
$('select[name="sub_category_id"]').trigger("change");
},
})
} else {
alert('danger');
}
});
$('select[name="sub_category_id"]').on('change', function() {
var sub_category_id = $(this).val();
if (sub_category_id) {
$.ajax({
url: "{{ url('/category/sub-sub-category/') }}/" + sub_category_id,
type: "GET",
dataType: "json",
success: function(data) {
var d = $('select[name="sub_sub_category_id"]').empty();
$.each(data, function(key, value) {
$('select[name="sub_sub_category_id"]').append('<option value="' + value.id + '">' + value.sub_sub_category_name + '</option>');
});
},
})
} else {
alert('danger');
}
});
});
This defined the callbacks for both. For category, when it is changed, it triggers change event on sub-category. This in turn will cascade the loading of the next Select.

Display data received from drop box value

I would like once the user selects a different item in the drop box list which was taken from a mysql database, that specific data to that field be displayed.
Currently, I am able to get the value of the item in the drop down box but I am unable to use it.
<h3>Drop down Menu</h3>
<select id="dmenu">
<option selected="selected" id="opt">Choose your station</option>
</select>
<div id="optionT"></div>
$(document).ready(() => {
window.onload = ajaxCallback;
function ajaxCallback(data) {
var data;
var myOptions;
var output;
$.ajax({
url: 'http://localhost:5000/alldata',
type: 'GET',
datatype: 'json',
success: (data) => {
//$.each(data, function (index, value) {
var output = [];
$.each(data, function(key, value) {
output.push('<option value="' + key + '">' + value.Station +
'</option>');
});
$('#dmenu').html(output.join(''));
}
})
}
});
$('#dmenu').on('change', function() {
//alert( this.value );
//alert($(this).find(":selected").value());
function stationData(data) {
var stationName = $(this);
alert(stationName.val());
//var stationName = $(this).value();
//var stationName = $(this).find(":selected").value()
$.ajax({
url: 'http://localhost:5000/alldata',
method: 'POST',
data: {
station: stationName
},
success: (data) => {
$.each(data, function(i) {
data[i]
//console.log(i);
var station_loopOp = '';
//console.log(JSON.stringify(data[i].Station));
station_loopOp += '<li>ID: ' + JSON.stringify(data[i].ID) +
'</li>' +
'<li>Station: ' + JSON.stringify(data[i].Station) +
'</li>' + '<li>Address:
'+JSON.stringify(data[i].Address) +
'</li>' + '<li>' +
Sales: JSON.stringify(data[i].Monthly_CStore_Sales) +
'</li>' + '<li>Operator: ' +
JSON.stringify(data[i].Operator) + '</li>' +
'<li>Top SKU: ' + JSON.stringify(data[i].Top_SKU) +
'</li>' +
'</<li>' + '<br/>');
$('#optionT').html(station_loopOp);
}
});
}
});

You are just defining the function stationData(data){....} inside the callback function but not calling it anywhere inside of it .
Add this line into your function : stationData(<your-data>);

Functions are not working in Ajax after a while

I have input which on change should send it is value to ajax and get response back. Ajax is working correct and enters to success,but does not working click function inside it if i do not do changes or click. If i click immediately after response it works, but if i do not do changes in 4-5 seconds it something like close the session. How can i avoid this timing?
here is my example of ajax
$('#unvan_search').on('keyup change', function() {
var unvan = $(this).val();
$.ajax({
type: "POST",
url: url,
data: {
'tpIdRegion': region_type_id_j + '_' + region_id_j,
'road': unvan,
'guid': my_key
},
beforeSend: function() {
console.log('before send');
},
success: function(e) {
console.log('suceess');
var output = [];
for (var i = 0; i < e.names.length; i++) {
output.push('<li class="get_street es-visible" idx="' + e.names[i].X + '" idy="' + e.names[i].Y + '" id="' + e.names[i].ID + '" value="' + e.names[i].ID + '" style="display: block;">' + e.names[i].Name + '</li>');
console.log('filled');
};
$('#unvan_select_div ul').html(output.join(''));
$("#unvan_select_div ul").on("click", '.get_street', function() {
//MY CODE HERE WHICH I CAN NOT USE AFTER 4-5 SECONDS
});
},
error: function(x, t, m) {
alert("error");
}
});
});

This binding here:
$("#unvan_select_div ul").on("click", '.get_street', function() { ... }
There’s no need to declare it in the success callback. This kind of delegate bindings is there for that purpose: being able to handle events on elements created at a later stage

It may work if you structure it like this.
var ret = false;
$.ajax({
type: "POST",
url: url,
data: {
'tpIdRegion': region_type_id_j + '_' + region_id_j,
'road': unvan,
'guid': my_key
},
beforeSend: function() {
console.log('before send');
},
success: function(e) {
ret = true;
console.log('suceess');
var output = [];
for (var i = 0; i < e.names.length; i++) {
output.push('<li class="get_street es-visible" idx="' + e.names[i].X + '" idy="' + e.names[i].Y + '" id="' + e.names[i].ID + '" value="' + e.names[i].ID + '" style="display: block;">' + e.names[i].Name + '</li>');
console.log('filled');
};
return;
},
error: function(x, t, m) {
alert("error");
}
});
});
if(ret) {
$('#unvan_select_div ul').html(output.join(''));
$("#unvan_select_div ul").on("click", '.get_street', function() {
//MY CODE HERE WHICH I CAN NOT USE AFTER 4-5 SECONDS
});
}

JQUERY fails to set parameter when currentRow.next().next() is not available

I have a jquery save function like this -
$(".SaveBtn").click(function () {
if ($("#Form1").valid()) {
var rowData = $("#TestTable").getRowData($(this).data("rowid"));
var currentRow = $(this).closest("tr");
var postData = {
testID: rowData.testID,
testNotes: currentRow.next().find(".NotesEntry").val(),
isActive: currentRow.next().next().find(".CheckEntry") == null ? "false" : currentRow.next().next().find(".CheckEntry").prop("checked"),
};
$.ajax({
type: "POST",
url: "../Services/test.asmx/UpdateTestRowData",
data: JSON.stringify(postData),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
if (data.d != null) {
$("#TestTable").setGridParam({ postData: { myID: $('#hfmyID').val() }, datatype: 'json' }).trigger("reloadGrid");
}
},
error: function (jqXHR, textStatus, errorThrown) {
}
});
}
});
The problem is with this line -
isActive: currentRow.next().next() == null ? "false" : currentRow.next().next().find(".CheckEntry").prop("checked"),
};
When currentRow.next().next() is not available, the isActive is not set as "false" and is even not in the request body to web service.
Currently the request body is {"testID":"e9c966ace446-4f73-9ba0-26e686b2a308","testNotes":"TEST"}
I expect it to be -
{"testID":"e9c966ace446-4f73-9ba0-26e686b2a308","testNotes":"TEST", "isActive":"false"}
Why the "isActive" parameter is missed and how to make it available when currentRow.next().next() is not available?
Thanks

I fixed the problem by adding the else part in the following statement -
if (data.d.IsActived) {
output += "<td colspan='6' align=\"left\"><input type='checkbox' id='cbActive" + rowId + " checked" + " name='cbManualDeactive" + rowId + "' class='CheckEntry CheckEntry' data-registrationid='" + data.d.ID + "' data-rowid='" + rowId + "'/></td>";
}
else {
output += "<td style=\"display:none;\"><input type='checkbox' id='cbActive" + rowId + " name='cbActive" + rowId + "' class='CheckEntry CheckEntry' data-registrationid='" + data.d.ID + "' data-rowid='" + rowId + "'/></td>";
}
Thanks

jQuery Select2 - Select ajax-submitted value

I have a form that submits a new entry via ajax and returns the entry data. I'm trying to get the returned data to be automatically selected in the Select2 field. I can get the id entered as the input value, but I'm not sure how to get the text to be displayed in the span.
Here's the JS I have so far:
function clientFormatResult(client){
var markup = client.first_name + ' ' + client.last_name + ' (' + client.username + ')';
return markup;
}
function clientFormatSelection(client) {
$('#client-input').empty();
$('#client-input').append('<input type="hidden" name="client" value="' + client.id + '" />');
return client.first_name + ' ' + client.last_name + ' (' + client.username + ')';
}
$('#client-selection').select2({
placeholder: 'Select a client',
allowClear: true,
minimumInputLength: 1,
ajax: {
type: 'POST',
url: 'clients/get_client_list',
dataType: 'json',
data: function (term) {
return {filter: term};
},
results: function (data) {
return {results: data};
}
},
formatResult: clientFormatResult,
formatSelection: clientFormatSelection,
dropdownCssClass: 'bigdrop',
initSelection: function (element, callback) {
var id = element.val();
if(id != '') {
$.ajax('clients/get_client_list/'+id).done(function(data) {
data = $.parseJSON(data);
callback(data);
});
}
}
});
$('#add-client-form').submit(function(e) {
e.preventDefault();
var form = $(this),
url = form.attr('action'),
data = form.serialize();
$.post(url, data, function(data, status, xhr) {
$('.form-response').fadeOut(400);
if(status == 'success') {
$('#add-client-modal').modal('hide');
data = $.parseJSON(data);
$('#client-selection').select2('val', data.client_id);
} else {
$('#add-client-failure').fadeIn(400);
}
});
});
As you can see, the text displayed is meant to be like "John Smith (smithj)".

I sorted it out, it was an issue with the data I was returning. Select2 was expecting an id variable, but I was returning it as client_id.