Develop Reference

Disabling couple input area if dropdown equal to 1

I am stuck up with this on my php page. I can't disable 3 input area after selected dropdown
I Just want to disable irrelevant input areas if type of slider selected like 1 otherwise do nothing
HTML Code which will use for condition:
<div class="form-group">
<label for="slider_type">Slider Type</label>
<select name="slider_type" class="form-select" id="slider_type" required>
<option value="" disabled selected>Please Select</option>
<option value="1">Image</option>
<option value="2">Video</option>
</select>
</div>
HTML Code Which i want to disable if slider_type equal to 1
<label for="slider_title">Slider Title</label>
<input type="text" name="slider_title" id="slider_title" class="form-control round" placeholder="Slider Title" onchange="DisableSliderInputArea()" required>
</div>
</div>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_description">Slider Body</label>
<input type="text" name="slider_description" id="slider_description" class="form-control round" placeholder="Slider Body" required>
</div>
</div>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_button_link">Slider Button Link</label>
<input type="text" name="slider_button_link" id="slider_button_link" class="form-control round" placeholder="Slider Button Link" required>
</div>
</div>
I tried this JavaScript code lines for 1 input area but it's not worked
<script type="text/javascript">
function DisableSliderInputArea(){
if(document.getElementById("slider_type").value=="1"){
document.getElementById("slider_title").disabled = true;
} else {
document.getElementById("slider_title").disabled = false;
}
}
</script>
What's really wrong?

You almost have done all the job, one thing that was missing is the actual call of the function DisableSliderInputArea once your select box has changed its' value. You needed to add an event listener, so once user changes the selected option, your function will get triggered, and the textarea will be disabled or enabled.
Feel free to run the snippet below, and see how it works. I added comments on the lines you need to add in JS section.
function DisableSliderInputArea() {
if (document.getElementById("slider_type").value == "1") {
document.getElementById("slider_title").disabled = true;
} else {
document.getElementById("slider_title").disabled = false;
}
}
// Get the select out of the DOM and store in a local variable
const dropdown = document.getElementById("slider_type");
// Attach an event listener, so once the select changes
// its' value, this function will be called
dropdown.addEventListener("change", DisableSliderInputArea);
<div class="form-group">
<label for="slider_type">Slider Type</label>
<select name="slider_type" class="form-select" id="slider_type" required>
<option value="" disabled selected>Please Select</option>
<option value="1">Image</option>
<option value="2">Video</option>
</select>
</div>
<label for="slider_title">Slider Title</label>
<input type="text" name="slider_title" id="slider_title" class="form-control round" placeholder="Slider Title" onchange="DisableSliderInputArea()" required>
</div>
</div>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_description">Slider Body</label>
<input type="text" name="slider_description" id="slider_description" class="form-control round" placeholder="Slider Body" required>
</div>
</div>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_button_link">Slider Button Link</label>
<input type="text" name="slider_button_link" id="slider_button_link" class="form-control round" placeholder="Slider Button Link" required>
</div>
</div>

you're almost done, just incorrectly putting onchange="DisableSliderInputArea()"
function DisableSliderInputArea(){
if(document.getElementById("slider_type").value=="1"){
document.getElementById("slider_title").disabled = true;
} else {
document.getElementById("slider_title").disabled = false;
}
}
<div class="form-group">
<label for="slider_type">Slider Type</label>
<select name="slider_type" class="form-select" id="slider_type" onchange="DisableSliderInputArea()" required>
<option value="" disabled selected>Please Select</option>
<option value="1">Image</option>
<option value="2">Video</option>
</select>
</div>
<label for="slider_title">Slider Title</label>
<input type="text" name="slider_title" id="slider_title" class="form-control round" placeholder="Slider Title" required>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_description">Slider Body</label>
<input type="text" name="slider_description" id="slider_description" class="form-control round" placeholder="Slider Body" required>
</div>
</div>
<div class="col-md-6 mb-4">
<div class="form-group">
<label for="slider_button_link">Slider Button Link</label>
<input type="text" name="slider_button_link" id="slider_button_link" class="form-control round" placeholder="Slider Button Link" required>
</div>
</div>

How to set empty or null value doesn't worked in Jquery change

I want the value in the input text to be null after the hide process
This is my view :
<div class="form-group row">
<label for="status" class="col-sm-4 col-form-label col-form-label-sm">Status Karyawan</label>
<div class="col-sm-8">
<select id="status" name="status" class="form-control form-control-sm" required>
<option value="" selected>Pilih Status Karyawan</option>
<option value="Kontrak">Kontrak</option>
<option value="Tetap">Tetap</option>
</select>
</div>
</div>
<div class="form-group row" id="tgl_pengangkatan" style="display:none">
<label for="tgl_pengangkatan" class="col-sm-4 col-form-label col-form-label-sm">Tgl. Pengangkatan</label>
<div class="col-sm-8 input-group">
<input name="tgl_pengangkatan" type="text" class="form-control datepicker form-control-sm" id="tgl_pengangkatan" placeholder="yyyy-mm-dd" value="">
</div>
</div>
<div class="form-group row" id="tgl_berakhir_kontrak" style="display:none">
<label for="tgl_berakhir_kontrak" class="col-sm-4 col-form-label col-form-label-sm">Tgl. Akhir Kontrak</label>
<div class="col-sm-8 input-group">
<input name="tgl_berakhir_kontrak" type="text" class="form-control datepicker form-control-sm" id="tgl_berakhir_kontrak" placeholder="yyyy-mm-dd" value="">
</div>
</div>
And than, this is my script:
<script>
$(function () {
$("#status").change(function() {
var val = $(this).val();
if(val === "Kontrak") {
$("#tgl_berakhir_kontrak").show();
$("#tgl_pengangkatan").hide();
$("#tgl_pengangkatan").val('');
}
else if (val === "Tetap") {
$("#tgl_pengangkatan").show();
$("#tgl_berakhir_kontrak").hide();
$("#tgl_berakhir_kontrak").val('');
}
});
});
I want to make it like that to minimize errors in the input process, thanks.

The element you are trying to change should be called with its name, not the id. Try changing it as:
$('[name="tgl_berakhir_kontrak"]').val('');
By the way, it's not a good practice to give identical name and id to separate elements on the same page.

How to apply validation if input fields are empty?

I am applying validations to all the input where values are left blank. Whenever any input is blank and user will click on save button them we add class has-error and display message in small tag.
I have written following html.
<div class="form-group">
<label class="col-sm-3 control-label">Academic Year *</label>
<div class="col-sm-7"><input type="text" id="academicyearname" maxlength="4" class="form-control only-numbers">
<small id="year_nameHelp" class="text-danger hide">
Academic Year is Required
</small>
</div>
</div>
<div class="form-group" id="dateStartsOn">
<label class="col-sm-3 control-label">Starts On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon">
<i class="fa fa-calendar"></i>
</span>
<input aria-required="true" id="startson" class="form-control block-keypress" type="text"
onclick="css()">
<small id="start_dateHelp" class="text-danger hide">
Start Date is Required
</small>
</div>
</div>
</div>
<div class="form-group" id="dateEndsOn">
<label class="col-sm-3 control-label">Ends On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon">
<i class="fa fa-calendar"></i>
</span>
<input aria-required="true" id="endson" class="form-control block-keypress" type="text" onclick="css()">
<small id="end_dateHelp" class="text-danger hide">
End Date is Required
</small>
</div>
</div>
</div>
...
....
In jquery I am doing following validation on save button click
if((":input").val().trim() =="")
{
$(this).closest(".form-group").addClass( "has-error");
$("small").removeClass('hide');
return;
}
if(academicyearname == "")
{
$("#academicyearname").closest(".form-group").addClass( "has-error");
$("#year_nameHelp").removeClass('hide');
$("#academicyearname").focus();
}
else if(startson == "")
{
$("#startson").closest(".form-group").addClass( "has-error");
$("#start_dateHelp").removeClass('hide');
}
else if(endson == "")
{
$("#endson").closest(".form-group").addClass( "has-error");
$("#end_dateHelp").removeClass('hide');
}
....
The part
if((":input").val().trim() =="")
{
$(this).closest(".form-group").addClass( "has-error");
$("small").removeClass('hide');
return;
}
is not working accordingly. I mean it should be able to dynamically detect which inputs are empty and then add error class to the corresponding input where value is "".

You can use jquery validator js's blank element plugin and you can use it as follows:
$( "input:blank" ).css( "background-color", "#bbbbff" );
Have a look at below:
https://jqueryvalidation.org/blank-selector/
It also can be applied at id and class level.

Try using
var result = $("input:text").val().trim();
if(result == ""){
//do something
}

var vendorError = false;
$(".vendorForm input").each(function () {
if ($(this).val() == '') {
jAlert('Required', 'empty');
vendorError = true;
var div = document.getElementById($(this).attr('id'));
// show meg logic
if (div.style.display !== "block") {
div.style.display = "block";
}
return false;
}
})
if (vendorError) {
return false;
}
HTML file
<div id="vendorForm" class="form-group">
<label class="col-sm-3 control-label">Academic Year *</label>
<div class="col-sm-7"><input type="text" id="academicyearname" maxlength="4" class="form-control only-numbers">
<small id="year_nameHelp" class="text-danger hide">
Academic Year is Required
</small>
</div>
</div>
<div class="form-group" id="dateStartsOn">
<label class="col-sm-3 control-label">Starts On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon">
<i class="fa fa-calendar"></i>
</span>
<input id="startson" value="" class="form-control block-keypress" type="text"
onclick="css()">
<small id="start_dateHelp" class="text-danger hide">
Start Date is Required
</small>
</div>
</div>
</div>
<div class="form-group" id="dateEndsOn">
<label class="col-sm-3 control-label">Ends On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon">
<i class="fa fa-calendar"></i>
</span>
<input id="endson" value="" class="form-control block-keypress" type="text" onclick="css()">
<small id="end_dateHelp" class="text-danger hide">
End Date is Required
</small>
</div>
</div>
</div>
...
....

I understood and somewhat same module i also designed. You can make the use of modal and give that id to in the js and on click button you can run the function in your js file. See my html page:
<div class="modal-body">
<div class="form-group">
<form id = "updateForm" onsubmit="return false" enctype="multipart/form-data">
<div class="left">
<div class="well img_height">
<img id="blah" src="admin_resources/images/user-icon.png"/>
</div>
<div>
<input type="file" name="myfile" onchange="readURL(this);" id="myfile"/>
</div>
</div>
<label for="emp_id">Employee Id:</label>
<input type="text" class="form-control" id="emp_id" name="employeeId" >
<p id="valid_msg_employee_id" class="error_message"></p>
<label for="fname">First Name:</label>
<input type="text" class="form-control" id="firstName" name="firstName" >
<p id="valid_msg_fname" class="error_message"></p>
<label for="lname">Last Name:</label>
<input type="text"class="form-control" id="lastName" name="lastName">
<p id="valid_msg_lname" class="error_message"></p>
<label for="designation">Designation:</label> <br/>
<select name="designation" id="dropdown" class="form-control">
<option value="Select">Select Designation</option>
<option value="manager">Manager</option>
<option value="HR">HR</option>
<option value="Tech Lead">Tech Lead</option>
<option value="QA Lead">QA Lead</option>
<option value="Developer">Developer</option>
<option value="QA-Automation">QA-Automation</option>
<option value="QA-Manual">QA-Manual</option>
<option value="Software Trainee">Software Trainee</option>
<option value="Sr. Software Quality Engineer">Sr. Software Quality Engineer</option>
<option value="SQE">SQE</option>
<option value="Software Quality Engineer">Software Quality Engineer</option>
<option value="Associate Software Engineer">Associate Software Engineer</option>
<option value="QA Manager">QA Manager</option>
</select>
<p id="valid_msg_designation" class="error_message"></p>
<label for="Doj">Joining Date:</label>
<input type="text" class="form-control" id="doj" name="yearOfJoining" >
<p id="valid_msg_year" class="error_message"></p>
<label for="status">Status:</label> <br/>
<select name="status" id="status" class="form-control">
<option value="active">Active</option>
<option value="inactive">inactive</option>
</select>
<p id="valid_msg_designation" class="error_message"></p>
<p id="valid_msg_year" class="error_message"></p>
<label for="email_id">Email-id:</label>
<input type="email" class="form-control" id="email" name="email">
<p id="valid_msg_email" class="error_message"></p>
<label for="quali">Contact:</label>
<input type="text" class="form-control" id="contact" name="mobileNo">
<p id="valid_msg_contact" class="error_message"></p>
<button type="submit" class="btn btn-default" onclick="updateEmployeeDetail();" data-dismiss="modal">Update</button>
<button type="button" class="btn btn-default" onclick = "deleteEmployee();" data-dismiss="modal">Delete</button>
</form>
</div>
</div>
and you can now add a class "erro_message which will be called on the modal:
the js file is this:
function employeeDetail() {
$("#submit_emp").click(function(event) {
var formValid = employeeDetail.formValidation();
if (formValid) {
var formvalue = new FormData($('#addForm')[0]);
$.ajax({
url: "intranet/addEmployee",
type: "POST",
data: formvalue,
contentType: false,
processData: false,
success: function(response) {
$('#your-modal').modal('toggle');
$("#header_success").empty();
$("#header_success").append("Response");
$("#message_success").empty();
$("#message_success").append(response.message);
$('#addForm').trigger("reset");
},
error: function(e) {
$('#your-modal').modal('toggle');
$("#message_success").empty();
$("#message_success").append(e.message);
}
});
} else {
return false;
}
});
You can add many validations on this input type and can append the messge ypuwant on that particular fied:
Hope this might help you.

This is super simplistic and does NOT do the "validation" by checking for example numeric values, etc. but you wanted/asked for the selector for empty text inputs so this gives that.
// put on some event, used change here:
$('input[type=text]').on('change', function() {
// just clear all
$(".form-group").removeClass("has-error");
$("small").addClass('hide');
// filter those empty ones
$('input[type=text]').filter(function() {
return $(this).val().trim() == "";
}).each(function() {
$(this).closest(".form-group").addClass("has-error");
$(this).parent().find("small").removeClass('hide');
});
});
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<div class="form-group">
<label class="col-sm-3 control-label">Academic Year *</label>
<div class="col-sm-7"><input type="text" id="academicyearname" maxlength="4" class="form-control only-numbers">
<small id="year_nameHelp" class="text-danger hide">Academic Year is Required</small>
</div>
</div>
<div class="form-group" id="dateStartsOn">
<label class="col-sm-3 control-label">Starts On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon"><i class="fa fa-calendar"></i> </span>
<input aria-required="true" id="startson" class="form-control block-keypress" type="text" >
<small id="start_dateHelp" class="text-danger hide">Start Date is Required</small>
</div>
</div>
</div>
<div class="form-group" id="dateEndsOn">
<label class="col-sm-3 control-label">Ends On *</label>
<div class="col-sm-7">
<div class="input-group date">
<span class="input-group-addon"> <i class="fa fa-calendar"></i> </span>
<input aria-required="true" id="endson" class="form-control block-keypress" type="text" >
<small id="end_dateHelp" class="text-danger hide">End Date is Required</small>
</div>
</div>
</div>

How to dynamically create text boxes on selection of a dropdown

I am new to web development and I am developing a form in HTML using Bootstrap.So I have a div like below:
<div class="form-group">
<label class="col-md-4 control-label" >Users</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-tasks"></i></span>
<select name="state" class="form-control selectpicker" >
<option value=" " >Please select the number of users</option>
<option>1</option>
<option>2</option>
<option >3</option>
</select>
</div>
</div>
</div>
So depending on the selection of number I want to dynamically create the text box like below div.
<div class="form-group">
<label class="col-md-4 control-label">Username</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input name="phone" placeholder="Username" class="form-control" type="text">
</div>
</div>
</div>
For example if he selects 1 then one text box should appear if selects 2 then 2 should appear.Any help is appreciated.

Try this
$('.selectpicker[name=state]').change(function() {
var i = 0;
//$('.input-group').children('input').remove() *for reset the inbox on change*
while (i < parseInt($(this).val())) {
$('.input-group').append('<input name="phone" placeholder="Username" class="form-control" type="text">')
i++;
}
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="form-group">
<label class="col-md-4 control-label">Users</label>
<div class="col-md-4 inputGroupContainer">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-tasks"></i></span>
<select name="state" class="form-control selectpicker">
<option value=" " >Please select the number of users</option>
<option>1</option>
<option>2</option>
<option >3</option>
</select>
</div>
</div>
</div>

Why does the change event never fire on a select box?

I've 3 list box like this one with a different id and name:
<div class="col-md-4 column">
<div class="form-group">
<input type="hidden" name="identityCardList[0].identityCardId">
<label for="identityCardType1" class="col-sm-3 control-label">Type</label>
<div class="col-sm-9">
<select id="identityCardType1" name="identityCardList[0].identityCardType" class="form-control">
</select>
</div>
</div>
<div class="form-group">
<label for="idCardValue1" class="col-sm-3 control-label">Valeur</label>
<div class="col-sm-9">
<input type="text" class="form-control" id="idCardValue1" name="identityCardList[0].value" placeholder="Entrer la valeur">
</div>
</div>
<div class="form-group">
<label for="expirationDateCard1" class="col-sm-3 control-label">Expiration</label>
<div class="col-sm-9">
<div class="input-group date" id="expirationDateCardPicker1">
<input type="text" id="expirationDateCard1" name="identityCardList[0].expiration" class="form-control"><span class="input-group-addon"><i class="glyphicon glyphicon-th"></i></span>
</div>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-3 col-sm-9">
<div class="checkbox">
<label><input type="checkbox" name="identityCardList[0].lodgerOwn" value="">Garde sur eux</label>
</div>
</div>
</div>
</div>
<div class="col-md-4 column">
...
</div>
<div class="col-md-4 column">
...
</div>
In the list box, I've this kind of value:
<select id="identityCardType1" name="identityCardList[0].identityCardType" class="form-control">
<option value=""></option>
<option value="1" data-card-expiration="false">Certificat de naissance</option>
<option value="2" data-card-expiration="false">N.A.S</option>
<option value="3" data-card-expiration="true">N.A.M</option>
</select>
When I select a value in the list box, I'd like to read the data-card-expiration value and disable expiration input text if needed.
This is my generic attempt:
$("select[id^='identityCardType']").on('change', 'select', function (e){
debugger;
if($(e.target).data("data-card-expiration")){
//disabled the nearest component expirationDateCard after this select
}
});
Why does the change event never occur?

You don't need to pass the selector 'select' to .on() just remove it. the selector filters the descendant of element.
$("select[id^='identityCardType']").on('change', function (e){ //Removed 'select'
});

Try this easy code
$("select#identityCardType1").on('change', function (e){
if($(this).data("cardexpiration")){
//disabled the nearest component expirationDateCard after this select
}
});