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Hide closest row anchor tag jquery

I have multiple div with class rows and in each row there is a dropdown on change of dropdown i want to hide the anchor tag with class "add_marks" which is inside the same row.
I'm using the following code to hide it:
jQuery(document).on('change', '.subject', function(e) {
var nearest_row = $(this).closest('div.row');
var elem = $(nearest_row).closest(".add_marks");
elem.hide();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<div class="row clearfix attr_fields">
<div class="col-sm-3">
<div class="form-group">
<h2 class="card-inside-title">Class</h2>
<div class="form-line focused">
<input type="text" name="name" class="form-control" required="">
</div>
</div>
</div>
<div class="col-sm-3">
<div class="form-group">
<h2 class="card-inside-title">Subject</h2>
<select name="subject_name" class="form-control subject" required="" aria-invalid="false">
<option value="">Select</option>
<option value="1">Maths</option>
<option value="2">Science</option>
</select>
</div>
</div>
</div>
<div class="col-sm-1">
<div class="form-group">
<div class="col-xs-1 col-sm-7 col-md-1"><i class="material-icons">add</i>Add Marks</div>
</div>
</div>

You have to get the next div and find the a link, then hide it.
var nearest_row = $(this).closest('div.row');
gets you the div.row.clearfix.attr_fields but the link is present in the next div, so doing next gets you the next div element, then you find the 'a' element.
You can also do next('div') instead of getting the next element to find the next div.
jQuery(document).on('change', '.subject', function(e) {
var nearest_row = $(this).closest('div.row').next().find('.add_marks').hide();
//console.log(nearest_row);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<div class="row clearfix attr_fields">
<div class="col-sm-3">
<div class="form-group">
<h2 class="card-inside-title">Class</h2>
<div class="form-line focused">
<input type="text" name="name" class="form-control" required="">
</div>
</div>
</div>
<div class="col-sm-3">
<div class="form-group">
<h2 class="card-inside-title">Subject</h2>
<select name="subject_name" class="form-control subject" required="" aria-invalid="false">
<option value="">Select</option>
<option value="1">Maths</option>
<option value="2">Science</option>
</select>
</div>
</div>
</div>
<div class="col-sm-1">
<div class="form-group">
<div class="col-xs-1 col-sm-7 col-md-1"><i class="material-icons">add</i>Add Marks</div>
</div>
</div>

Here is Working code example run it with js (shortcut: ctrl + enter)
...want to hide the anchor tag with class "add_marks" which is inside the same row.
So I have moved that button inside row.
Using .col* as direct child of .row is proper way of using bootstrap grid.
Used the following jQuery considering your requirement.
jQuery(document).on('change', '.subject', function (e) {
$(this)
.parents('.row')
.find('.add_marks')
.hide();
});

How to add dynamic data attribute value to a button and a div generated by repeater.js

I am using repeater.js to repeat a div with some input fields and button, but the problem is that i want to give each and every div a unique id so that i can extract data from all the fields of that particular div input elements.
this is the HTML Code:
<div class="form-group mt-repeater">
<a href="javascript:;" data-repeater-create class="btn btn-circle purple mt-repeater-add">
<i class="fa fa-edit"></i> Repeat Field
</a>
<div data-repeater-list="group-b">
<div data-repeater-item class="mt-repeater-item">
<div class="mt-repeater-cell">
<div class="row">
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" id="dosage_form" class="form-control typeahead-findings circle-input" placeholder="Dosage Form">
<label for="dosage_form">e.g. Tablet / Syrup / Capsule etc.</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" id="brand_name" class="form-control typeahead-findings circle-input" placeholder="Brand / Generic Name">
<label for="brand_name">e.g. Dytor</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<input class="form-control circle-input" id="contents" type="text" placeholder="Contents" />
<span class="help-block"> e.g Paracetamol </span>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" id="dose" class="form-control typeahead-findings circle-input" placeholder="Dose">
<label for="dose">e.g. 20 mg / 20 ml</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<input class="form-control circle-input" id="dose_regimen" type="text" placeholder="Dose Regimen" />
<span class="help-block"> e.g 1-1-1-1 </span>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" id="therapy_duration" class="form-control typeahead-findings circle-input" placeholder="Therapy Duration">
<label for="therapy_duration">e.g. 1 Day / 1 Month etc.</label>
</div>
</div>
</div>
<div class="col-md-1 col-sm-6 col-xs-6">
<i class="fa fa-plus"></i>
</div>
<div class="col-md-1 col-sm-6 col-xs-6">
<i class="fa fa-minus"></i>
</div>
</div>
</div>
</div>
every time i click on the add repater button this div gets replicated but what i also want is that the new div generated should have a unique div id also the curresponding elemnts inside it should have a class or id starting with that id so that data extraction can be easy for that particular div
I was using this Jquery code:
$(".addData").on('click' ,function()
{
alert("hi");
});
This is the repeater i am using: https://pastebin.com/n7g7tdTH
but this code only runs for the very first div on the later generated dynamic divs it doesn't run. I also tried editing the repeater.js but no success because its all dynamic and i am not able to understand where i should edit that code to add a dynamic data-counter value for the div and the corresponding elements.
Can anyone help with this logic?

Another option, to retrieve field values would be to rename all input field id with name (example below) and use repeater.js repeaterVal() to get all the field values .
$(".mt-repeater").repeater();
$("#getVal").click(function () {
$('.mt-repeater').repeaterVal()["group-b"].map(function(fields){
//fields contain the collection of input fields per row
console.log(fields["dosage_form"]);
console.log(fields["brand_name"]);
//....
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.repeater/1.2.1/jquery.repeater.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
<div class="form-group mt-repeater">
<a href="javascript:;" data-repeater-create class="btn btn-circle purple mt-repeater-add">
<i class="fa fa-edit"></i> Repeat Field
</a>
<div data-repeater-list="group-b">
<div data-repeater-item class="mt-repeater-item">
<div class="mt-repeater-cell">
<div class="row">
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" name="dosage_form" class="form-control typeahead-findings circle-input" placeholder="Dosage Form">
<label for="dosage_form">e.g. Tablet / Syrup / Capsule etc.</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" name="brand_name" class="form-control typeahead-findings circle-input" placeholder="Brand / Generic Name">
<label for="brand_name">e.g. Dytor</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<input class="form-control circle-input" nam="contents" type="text" placeholder="Contents" />
<span class="help-block"> e.g Paracetamol </span>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" name="dose" class="form-control typeahead-findings circle-input" placeholder="Dose">
<label for="dose">e.g. 20 mg / 20 ml</label>
</div>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<input class="form-control circle-input" name="dose_regimen" type="text" placeholder="Dose Regimen" />
<span class="help-block"> e.g 1-1-1-1 </span>
</div>
</div>
<div class="col-md-2">
<div class="form-group">
<div class="input-group">
<input type="text" name="therapy_duration" class="form-control typeahead-findings circle-input" placeholder="Therapy Duration">
<label for="therapy_duration">e.g. 1 Day / 1 Month etc.</label>
</div>
</div>
</div>
<div class="col-md-1 col-sm-6 col-xs-6">
<i class="fa fa-plus"></i>
</div>
<div class="col-md-1 col-sm-6 col-xs-6">
<i class="fa fa-minus"></i>
</div>
</div>
</div>
</div>
<button id="getVal">Get Value</button>

For the first problem..
but this code only runs for the very first div on the later generated
dynamic divs it doesn't run
You can convert your jquery events into delegated events.. These allow you to catch events on DOM elements based on a selector, so when newer DOM elements are added these are caught too.
So -> $(".addData").on('click' ,function()
As a delegated event becomes -> $(document.body).on("click",".addData" ,function()
The second problem.
but how to get the values from the input field that are present near that button
This can be achieved by traversing up the DOM tree to a parent that surrounds the elements you want,. eg. .row or maybe mt-repeater-cell, as long as it's a DOM element that contains the elements you want to find. Here you can use jquery's closest selector, that will traverse up the tree until it finds the element your after.
So -> $(this).closest('.row').find('#dose_regimen').val()
The above will traverse up the DOM tree until it finds a .row class, we then find element with id dose_regimen etc,.. #dose_regimen and then finally get it's value with .val()

Appending row in container

I am writing a code which dynamically creates rows.
The problem is when I click on button it adds row after the already present row. but Now div with id dynamic contains two rows and so if I click now button it will add two rows. If I use ('#dynamic').html() then it grabs columns but if it is done so it violates the indentation because it will not add the div with class row.
Please any body can tell me the solution to problem?
$(function() {
$("#button1").click(function() {
$("#main-row").after($('#dynamic').html());
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<section id="above">
<div class="container">
<div class="row">
<div class="col-sm-1">No.</div>
<div class="col-sm-2">Name of Item</div>
<div class="col-sm-3">Quanity</div>
<div class="col-sm-3">Price</div>
<div class="col-sm-1"><span class="btn"></span></div>
</div>
</div>
<div class="container" id="dynamic">
<div class="row padding-3 " id="main-row">
<div class="col-sm-1 ">1</div>
<div class="col-sm-2 ">
<select class="container-fluid">
<option value="1">Computer</option>
<option value="2">Mobile</option>
<option value="3">LCD</option>
<option value="4">Keyboard</option>
<option value="5">Mouse</option>
</select>
</div>
<div class="col-sm-3 "><input class="container-fluid" type="number" name="name" value="" /></div>
<div class="col-sm-3 "><input type="text" name="text" value="" /></div>
<div class="col-sm-1 ">-</div>
</div>
</div>
<button class="btn btn-primary" id="button1">Add Row</button>
</section>

Try:
$(function() {
$("#button1").click(function() {
$('#dynamic').append($("#main-row").clone().removeAttr('id'));
});
});

jQuery Select Checkbox - Select All

I have the following Checklist and Tasks Structure
Now i want if any one checks a Task i want to make sure the the Checklist also gets checked.
When someone unchecks the checklist all the tasks should get unchecked.
<!-- Checklist -->
<div class="checklist">
<div class="media">
<div class="pull-left checklist-checkbox">
<input class="checklist-input" name="checklist" type="checkbox" value="">
</div>
<div class="media-body task-list">
<h4 class="media-heading">This is a CheckList</h4>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body">Search for entertainers that perform the types of shows that are suitable for your function.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Book your venue.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Search for a caterer that is suitable for your function. <span class="label label-default">Lalu - June 23rd, 2014</span></div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Hold a training session for all attending staff and brief them on all activities and expectations for the day of the event.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Appoint an adequate number of staff as greeters to welcome guests and orient them with the event activities and venue.</div>
</div>
<div class="add-task">Add Task</div>
<div class="form-add-task">
<form action="addtask.php" method="post">
<input type="text" class="form-control task-input">
<input class="btn btn-sm btn-default" name="submit-task" type="submit" value="Add Task">
</form>
</div>
</div>
</div>
</div>
<div class="checklist">
<div class="media">
<div class="pull-left checklist-checkbox">
<input class="checklist-input" name="checklist" type="checkbox" value="">
</div>
<div class="media-body task-list">
<h4 class="media-heading">This is a CheckList</h4>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body">Search for entertainers that perform the types of shows that are suitable for your function.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Book your venue.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Search for a caterer that is suitable for your function. <span class="label label-default">Lalu - June 23rd, 2014</span></div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Hold a training session for all attending staff and brief them on all activities and expectations for the day of the event.</div>
</div>
<div class="media tasks">
<div class="pull-left task-checkbox">
<input class="task-input" name="task" type="checkbox" value="">
</div>
<div class="media-body"> Appoint an adequate number of staff as greeters to welcome guests and orient them with the event activities and venue.</div>
</div>
<div class="add-task">Add Task</div>
<div class="form-add-task">
<form action="addtask.php" method="post">
<input type="text" class="form-control task-input">
<input class="btn btn-sm btn-default" name="submit-task" type="submit" value="Add Task">
</form>
</div>
</div>
</div>
</div>
<!-- / Checklist -->
jQuery Code:
$('input.checklist-input').on('change',function(){
$(this).parent().siblings('.task-list').find('input.task-input').prop('checked',$(this).prop('checked'));
})

Similar to Caio Vianna, just a different if, and targeting the proper list. Also added the unchecking of checklist if there's no longer any checked tasks. I'm sure you can optimize the selectors though, anyways should be helpful
$('input.task-input').on('change', function () {
if ($(this).prop('checked') === true) {
$(this).closest('div.tasks').parent().prev().find('input.checklist-input').prop('checked', true);
} else {
var checked = $(this).closest('div.task-list').find('input.task-input:checked').length;
if (checked === 0) {
$(this).closest('div.tasks').parent().prev().find('input.checklist-input').prop('checked', false);
}
}
})

I believe you are lacking the function that does the following logic:
Listen to the change event on .task-input
Determine if the length of checked items of grouped .task-input elements exceeds 0
If it exceeds zero, check the group's own .checklist-input
If not, uncheck the group's own .checklist-input
And here is the missing function:
$('input.task-input').on('change', function() {
var tasks = $(this).closest('.task-list').find('input.task-input:checked').length;
$(this).closest('.checklist').find('input.checklist-input').prop('checked',tasks);
});
Proof-of-concept fiddle: http://jsfiddle.net/teddyrised/1cy47tga/1/

Your code will check everything (or not) as the master checklist is toggled (alas, when you check it, it will check everything inside, and vice versa).
You want to test that first so ...
$('input.checklist-input').on('change',function(){
if (!$(this).prop('checked'))
$(this).parent().siblings('.task-list').find('input.task-input').prop('checked',false);
})
That will only UNCHECK, since it only runs if you unchecked the master checklist.
As for the rest
$(input.task-input').on('change',function() {
if ($(this).prop('checked'))
$('input.checklist-input').prop('checked',true);
})
Will check the master checklist only if you checked a sibling
Note: my jquery selector skills are rusty, so I might made some mistake there, but I guess the logic of the thing isclear =p

You should take control in two steps:
For the main level checklist button:
$('body').on('change', '.checklist-input', function () {
var checked = $(this).prop('checked');
$(this).closest('.checklist').find('.task-input:checkbox').prop('checked', checked);
});
For the second level checkboxes:
$('body').on('change', '.task-input:checkbox', function () {
var checkedArray = [];
var $checkboxes = $(this).closest('.checklist').find('.task-input:checkbox');
$checkboxes.each(function () {
var checked = $(this).prop('checked');
if (checked) {
checkedArray.push(checked);
}
});
var totalChecked = false;
if (checkedArray.length == $checkboxes.length) {
totalChecked = true;
}
$(this).closest('.checklist').find('.checklist-input').prop('checked', totalChecked);
});
JSFiddle Demo.

Add/Remove button not working on duplicated form fields - jquery

I have used the code from the following answer: jquery clone form fields and increment id to created a clone-able area of my form and all is working well except for the "Add another" and "Remove row" button.
Only the original clone-able areas Add / Remove buttons work so the next cloned area's add / remove buttons don't do anything meaning you have use the first row's which is confusing.
I really can't see what is going on. Any help would be greatly appreciated!
The HTML:
<div id="previous-jobs">
<div class="panel-group" id="accordion">
<div id="clonedInput1" class="clonedInput panel panel-default">
<div class="panel-heading clearfix">
<h4 class="panel-title pull-left">
<a class="heading-reference accordion-toggle" data-toggle="collapse" data-parent="#accordion" href="#collapse1">
Entry #1
</a>
</h4>
<div id="action-buttons" class="pull-right">
<button type="button" class="btn btn-success clone">Add another</button>
<button type="button" class="btn btn-danger remove">Delete Row</button>
</div>
</div>
<div id="collapse1" class="input-panel panel-collapse collapse">
<div class="panel-body">
<div class="row">
<div class="form-group col-sm-6">
<label class="p-date-from-title input-title" for="p-date-from">Date From</label>
<input type="text" class="ci-df form-control" id="p-date-from1" name="p-date-from" value="[[+!fi.p-date-from]]" placeholder="Date from">
</div>
<div class="form-group col-sm-6">
<label class="p-date-to-title input-title" for="p-date-to">Date To</label>
<input type="text" class="ci-dt form-control" id="p-date-to1" name="p-date-to" value="[[+!fi.p-date-to]]" placeholder="Date to">
</div>
</div>
<div class="form-group">
<label class="p-employer-title input-title" for="p-employer">Employer</label>
<input type="text" class="ci-em form-control" id="p-employer1" name="p-employer" value="[[+!fi.p-employer]]" placeholder="Employer">
</div>
<div class="form-group">
<label class="p-position-title input-title" for="p-position">Position</label>
<input type="text" class="ci-po form-control" id="p-position1" name="p-position" value="[[+!fi.p-position]]" placeholder="Position">
</div>
<div class="form-group">
<label class="p-salary-title input-title" for="p-salary">Salary</label>
<input type="text" class="ci-sa form-control" id="p-salary1" name="p-salary" value="[[+!fi.p-salary]]" placeholder="Salary">
</div>
<div class="form-group">
<label class="p-full-part-time-title input-title" for="p-full-part-time">Full/Part Time</label>
<select class="ci-fpt form-control" id="p-full-part-time1" name="p-full-part-time" value="[[+!fi.p-full-part-time]]">
<option value="Full Time">Full Time</option>
<option value="Part Time">Part Time</option>
</select>
</div>
<div class="form-group">
<label class="p-leaving-reason-title input-title" for="p-leaving-reason">Reason for Leaving</label>
<input type="text" class="ci-rfl form-control" id="p-leaving-reason1" name="p-leaving-reason" value="[[+!fi.p-leaving-reason]]" placeholder="Reason for leaving">
</div>
</div>
</div>
</div>
</div>
The jQuery:
var regex = /^(.*)(\d)+$/i;
var cloneIndex = $(".clonedInput").length;
$("button.clone").click(function(){
cloneIndex++;
$(this).parents(".clonedInput").clone()
.appendTo("#accordion")
.attr("id", "clonedInput" + cloneIndex)
.find("*").each(function() {
var id = this.id || "";
var match = id.match(regex) || [];
if (match.length == 3) {
this.id = match[1] + (cloneIndex);
this.name = match[1] + (cloneIndex);
}
$(this).find('.heading-reference').attr("href", "#collapse" + cloneIndex).html('Entry #' + cloneIndex);
});
});
$("button.remove").click(function(){
$(this).parents(".clonedInput").remove();
});

For dynamically added elements, use .on() jQuery documentation .on() (For jQuery 1.7 and above)
In the example you posted, they used .live() which is for jQuery 1.7 and below.
Add this outside of any $(document).ready() function:
$(document).on('click', 'button.clone', function(){
...
});
By doing this, the event handler gets added to the document so any time an event bubbles up to it that originated from a button.clone element, it will trigger that function. So when buttons get added after the page is loaded, they will still trigger the click event, even when they weren't available when the page initially loaded.
If you just use $('button.clone').click(...) only the buttons that are on the page when it is first loaded will trigger the click event.