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Validate dynamically appended text box fields-jQuery

I have a dynamic input field that gets appended after a plus button.
The corresponding id of these fields are answer0, answer1, answer2 and so on. That means after button click the id will be dynamically appended to the text field.
Now I want to validate these fields. My validation code is as follows
function showValidation(response) {
var respArray = JSON.parse(response.responseText).errors;
for(var i=0;i<=(Object.keys(respArray).length);i++){
var optionss= 'Enter Answers.';
if($("#answer"+i).val()==''){
$('#answer'+i+' + span').html('');
$('#answer'+i).after('<span class="' + errTextboxClass + '" style="color:#e03b3b">' + optionss+ '</span>');
$('#answer'+i).focus();
}
}
}
I am checking till response error length. But before giving values in these fields, validation works properly(fig 1). But if I enter values for first 2 fields as in the image above, the validation message does not shows for the third field (fig 2). Because at this stage the id is answer2 and the loop 'i' value checks 0 first and next checks 1. So inside loop answer0 and answer1 are having values so the validation stops there. I need to get validation for the next fields too. Thanks in advance.
My HTML and corresponding append function
<input class="form-control" name="answer0[]" id="answer0" placeholder="OPTION 1">
<a class="add-option" onclick="AppendOption()"><img src="{{asset('admin/images/icn-add-option.png')}}" alt=""></a>
function AppendOption(){
var k=1;
$('#appendOption').append('<div class="form-group row"><div class="col-md-4"><input class="form-control" name="answer0[]" id="answer'+k+'" placeholder="OPTION" ></div></div>');
k++;
}

In your AppendOption function, you set k=1 This is an invalid option once you reach the third entry (option 2). You should instead detect that, better yet still make it context sensitive when it executes. I did this by adding a answer-item class and detecting how many we have and using that number instead.
I wrapped all this in a <div id="options-container"> so I would have a place to hook the event handler (delegateTarget) https://api.jquery.com/event.delegateTarget/
I would not have used an ID here and instead used classes, but that is not part of the question but more rather the cause of it.
$('.options-container').on('click','.add-option',function(event){
let k= $(event.delegateTarget).find('.answer-item').length;
$(event.delegateTarget).append('<div class="form-group row"><div class="col-md-4"><input class="form-control answer-item" name="answer0[]" id="answer' + k + '" placeholder="OPTION" ></div></div>');
});
function showValidation(response) {
var respArray = JSON.parse(response.responseText).errors;
for (var i = 0; i <= (Object.keys(respArray).length); i++) {
var optionss = 'Enter Answers.';
if ($("#answer" + i).val() == '') {
$('#answer' + i + ' + span').html('');
$('#answer' + i).after('<span class="' + errTextboxClass + '" style="color:#e03b3b">' + optionss + '</span>');
$('#answer' + i).focus();
}
}
}
<div id="options-container">
<input class="form-control answer-item" name="answer0[]" id="answer0" placeholder="OPTION 1">
<a class="add-option"><img src="{{asset('admin/images/icn-add-option.png')}}" alt=""></a>
</div>

If the fields are required you should mark them as required otherwise you validate every field. In your case another way for validating could look like this
function showValidation(response) {
var respArray = JSON.parse(response.responseText).errors;
$('.form-group input.form-control').each(function(){
if ($(this).val() == '') {
$(this).next('span').html('');
$(this).after('<span class="' + errTextboxClass + '" style="color:#e03b3b">' + optionss+ '</span>');
$(this).focus();
}
});
}
Since I don't know how and where the showValidation() is called I can't improve it further.

I tried to display the error messages inside an input array loop and I got the answer.
var result = document.getElementsByTagName("input");
var optionss= 'Enter Answers.';
for (var j = 0; j < result.length; j++) {
if($("#answer"+j).val()==''){
$('#answer'+j+' + span').html('');
$('#answer'+j).after('<span class="' + errTextboxClass + '" style="color:#e03b3b">' + optionss+ '</span>');
$('#answer'+j).focus();
}

How to create a enhanced HTML TransferBox with an attribute

I need to create an enhanced transferbox, using HTML, JavaScript and JQuery.
I have a set of options a user can select from and associate with an attribute. The selection and deselection must be accomplished with two SELECT HTML elements (i.e., a transferbox). For example, these options can be a list of skill names.
When the 'add' button is clicked, the option(s) selected in the first SELECT element, along with an attribute (e.g. number of years from a text box) must be transferred from the source SELECT element to selected/destination SELECT element. The attribute must be displayed along with the item text in this second SELECT element (for example, the item displays the skill and the number of years).
When the 'remove' button is clicked, the selected option(s) in the second SELECT element must be moved back to the first SELECT element (in the original format .. without the attribute).
JSON should be the data format for initial selection setup and saving latest selections.
I want an initial set of selections and attributes to be set via JSON in an a hidden input field. I want the final set of selections to be saved to JSON in the same hidden input field.
Example HTML:
<input type="hidden" id="SelectionsId" value='[{ "id": "2", "attribute":"15"},{ "id": "4", "attribute":"3" }]' />
<!--<input type="hidden" id="SelectionsId" value='[]' />-->
<div>
<select class="MultiSelect" multiple="multiple" id="SelectFromId">
<option value="1">.NET</option>
<option value="2">C#</option>
<option value="3">SQL Server</option>
<option value="4">jQuery</option>
<option value="5">Oracle</option>
<option value="6">WPF</option>
</select>
<div style="float:left; margin-top:3%; padding:8px;">
<div>
<span>Years:</span>
<input id="YearsId" type="number" value="1" style="width:36px;" />
<button title="Add selected" id="includeBtnId">⇾</button>
</div>
<div style="text-align:center;margin-top:16%;">
<button title="Remove selected" id="removeBtnId">⇽</button>
</div>
</div>
<select class="MultiSelect" multiple="multiple" id="SelectToId"></select>
</div>
<div style="clear:both;"></div>
<div style="margin-top:40px;margin-left:200px;">
<button onclick="SaveFinalSelections();">Save</button>
</div>
Example CSS:
<style>
.MultiSelect {
width: 200px;
height: 200px;
float: left;
}
</style>
Visual of requirement:

Here's a solution to the challenge. The variables being setup at the start make this solution easy to configure and maintain.
When the page gets displayed, the SetupInitialSelections method looks at the JSON data in the hidden input field and populates the selected items.
When the 'Save' button clicked, the current selections are converted to JSON and placed back in the hidden input field.
Invisible character \u200C is introduced to delimit the item text and the attribute during display. This comes in to use if the item has to be removed and the original item text has to be determined so it can be placed back in the source SELECT element.
The selectNewItem variable can be set to true if you would like the newly added item to be selected soon after adding it to the SELECT element via the 'add' or 'remove' operations.
This solution supports multiple item selections. So multiple items can be added at once ... and similarly multiple items can be removed at once.
<script src="jquery-1.12.4.js"></script>
<script>
var savedSelectionsId = 'SelectionsId';
var fromElementId = 'SelectFromId';
var toElementId = 'SelectToId';
var includeButtonId = 'includeBtnId';
var removeButtonId = 'removeBtnId';
var extraElementId = 'YearsId';
var extraPrefix = " (";
var extraSuffix = " years)";
var noItemsToIncludeMessage = 'Select item(s) to include.';
var noItemsToRemoveMessage = 'Select item(s) to remove.';
var selectNewItem = false;
var hiddenSeparator = '\u200C'; // invisible seperator character
$(document).ready(function () {
SetupInitialSelections();
//when button clicked, include selected item(s)
$("#" + includeButtonId).click(function (e) {
var selectedOpts = $('#' + fromElementId + ' option:selected');
if (selectedOpts.length == 0) {
alert(noItemsToIncludeMessage);
e.preventDefault();
return;
}
var attribute = $("#" + extraElementId).val();
selectedOpts.each(function () {
var newItem = $('<option>', { value: $(this).val(), text: $(this).text() + hiddenSeparator + extraPrefix + attribute + extraSuffix });
$('#' + toElementId).append(newItem);
if (selectNewItem) {
newItem.prop('selected', true);
}
});
$(selectedOpts).remove();
e.preventDefault();
});
//when button clicked, remove selected item(s)
$("#" + removeButtonId).click(function (e) {
var selectedOpts = $('#' + toElementId + ' option:selected');
if (selectedOpts.length == 0) {
alert(noItemsToRemoveMessage);
e.preventDefault();
return;
}
selectedOpts.each(function () {
var textComponents = $(this).text().split(hiddenSeparator);
var textOnly = textComponents[0];
var newItem = $('<option>', { value: $(this).val(), text: textOnly });
$('#' + fromElementId).append(newItem);
if (selectNewItem) {
newItem.prop('selected', true);
}
});
$(selectedOpts).remove();
e.preventDefault();
});
});
// Setup/load initial selections
function SetupInitialSelections() {
var data = jQuery.parseJSON($("#" + savedSelectionsId).val());
$.each(data, function (id, item) {
var sourceItem = $("#" + fromElementId + " option[value='" + item.id + "']");
var newText = sourceItem.text() + hiddenSeparator + extraPrefix + item.attribute + extraSuffix;
$("#" + toElementId).append($("<option>", { value: sourceItem.val(), text: newText }));
sourceItem.remove();
});
}
// Save final selections
function SaveFinalSelections() {
var selectedItems = $("#" + toElementId + " option");
var values = $.map(selectedItems, function (option) {
var textComponents = option.text.split(hiddenSeparator);
var attribute = textComponents[1].substring(extraPrefix.length);
var attribute = attribute.substring(0, attribute.length - extraSuffix.length);
return '{"id":"' + option.value + '","attribute":"' + attribute + '"}';
});
$("#" + savedSelectionsId).val("[" + values + "]");
}
</script>

passing/displaying values from JavaScript to HTML page

I have the following JS code which use's local storage to display the 'name' and 'age' entered previously:
This HTML code currently displays the date, time, name and age of a person in a table. how can i pass these values to be displayed in a HTML form as labels instead of in that table?
HTML only bringing back the start time, name and age aren't being displayed:
<div id="history_list"></div>
<div id="name"> </div>
<div id="age"></div>
JS:
function loadHistoryList() {
for(var i = numberOfHistory; i >= 1; i--) {
var historyData = new historyElement(db.getItem(i.toString()));
if(historyData === null) {
console.error('error');
continue;
}
$('#history_list').append(historyData.startTime);
$('#name').append(historyData.name);
$('#age').append(historyData.age);
}
}

instead of
var div = '<div id="history_element"><div id="element_title">' + historyData.startDate + ' ' + historyData.startTime + '</div><table>';
var div = '<div id="name"><tr><td>name: </td><td>' + historyData.name+ '</td></tr>';
var div = '<div id="age"><tr><td>age: </td><td>' + historyData.age+ '</td></tr>';
div += '</table></div>';
$('#history_list').append(div);
$('#name').append(div);
$('#age').append(div);
Do this:
$('#history_list').append(historyData.startTime);
$('#name').append(historyData.name);
$('#age').append(historyData.age);
In short: you can (and should in this case) simply add the desired value to the container (the DIV, Form field, or whatnot)
those three lines starting witn var div (...) are overwriting each previous line, but that is a side note.
Overall, you should read up more on JavaScript and/or JQuery.

To populate the form field First you have to add a form element like input field
HTML
<div id="history_list">
</div>
<input type="text" id="name" name="name">
JS
function loadHistoryList() {
for(var i = numberOfHistory; i >= 1; i--) {
var historyData = new historyElement(db.getItem(i.toString()));
if(historyData === null) {
console.error('error');
continue;
}
$('#name').val(historyData.name);
}
}

Jquery, Pass an input value to a cloned input field

I have a form with a few input fields used to create an address book. If the user wants to add another set of names, they can click on add more. If the users have the same username, instead of typing it over and over again, i added a checkbox.
If the user selects the checkbox, it will pass the value from the first username input field to ALL username input fields.
The code below works on the second set of input fields but when i click on add more, it doesnt pass the values.
$('#check1, #addmore').click(function(){
if (this.checked) {
$('.pass').val($('.original').val());
}
});
here's the full code.

You can use the class you already have assigned to your button which is the .add_field_button class. Then you just have you can assign the value to each input box value with an id that starts with username as long as the #check1 element is checked.
//changed the selector, you already had this class present in your markup
$('.add_field_button').on(
"click",function(){
//if the check1 checkbox is checked
if ($("#check1").is(":checked")) {
/*select every id that starts with "username" and sets it value
to the .original input text box value*/
$("[id^=username]").val($(".original").val());
}
});
After reviewing your jsfiddle I found some additional errors:
You are using html comments in your JavaScript. Instead of <!--my comment--> you will need to use either // for single line comments or /* my comment */ for multi-line comments.
After removing the comment syntax errors I may have came across some unexpected behavior when using my original answer. The if then statement still applies but I moved it to inside your add_more button event because it was only cloning the username after the third set of inputs was being added.
Live Example: http://codepen.io/larryjoelane/pen/rxKZYm?editors=1010
Updated JavaScript:
$(document).ready(function() {
Number.prototype.pad = function(size) {
var s = String(this);
while (s.length < (size || 0)) {
s = "0" + s;
}
return s;
}
var max_fields = 10; //maximum input boxes allowed
var wrapper = $(".input_fields_wrap"); //Fields wrapper
var add_button = $(".add_field_button"); //Add button ID
var x = 1; //initlal text box count
var c = 9;
$(add_button).click(function(e) { //on add input button click
e.preventDefault();
if (x < max_fields) { //max input box allowed
x++; //text box increment
c++;
$(wrapper).append('<div><label><span>Template Id :</span><input type="text" name="templateid' + x + '" id="templateid' + x + '"></label><br><label><span>UNC Path :</span><input type="text" name="uncpath' + x + '" id="uncpath' + x + '"></label><br><label><span>Username :</span><input type="text" class="pass" name="username' + x + '" id="username' + x + '"></label><br><label><span>Password :</span><input type="text" name="password' + x + '" id="password' + x + '"></label><br><label><span>Name :</span><input type="text" name="scantoname' + x + '" id="scantoname' + x + '"></label>Remove</div>'); //add input box
/*add input value to 'how many field*/
$.each($('input[name="howmany[]"]'), function() {
$(this).val(x);
});
/*add input value to 'templateid field*/
$('input[name="templateid' + x + '"]').each(function() {
$(this).val((x).pad(3, 0));
});
}
//////////added code////////////////
//if the check1 checkbox is checked
if ($("#check1").is(":checked")) {
/*select every id that starts with "username" and sets it value
to the .original input text box value*/
$("[id^=username]").val($(".original").val());
}
//////////added code////////////////
});
$(wrapper).on("click", ".remove_field", function(e) { //user click on remove text
e.preventDefault();
$(this).parent('div').remove();
x--;
})
});

First you need to add the id #addmore to your button in the HTML
<button id="addmore" class="add_field_button btn btn-primary">Add More</button>
Then just modify your click function like this :
$('#check1, #addmore').click(function(){
if($('#check1').is(':checked')) {
$('.pass').val($('.original').val());
}
});

how to make input fields editable?

I have this fiddle which is having user tab.In user tab ,there are three fields which accepts name,mobile and email.When a user fills all the three and hits add button then a row is inserted.Now i want to make the new added row editable.This means that I want to keep 2 bootstrap buttons edit and delete.So if delete is pressed then the entire row will be deleted and if edit is pressed then the entire will be editable where user can change the mobile number,name and email.Can any body please tell me how to do.
This js code adds new rows
$('#btn1').click(function () {
if ($(".span4").val() != "") {
$("#mytable").append('<tr id="mytr' + val + '"></tr>');
$tr=$("#mytr" + val);
$tr.append('<td class=\"cb\"><input type=\"checkbox\" value=\"yes\" name="mytr' + val + '" unchecked ></td>');
$(".span4").each(function () {
$tr.append("<td >" + $(this).val() + "</td>");
});
var arr={};
name=($tr.find('td:eq(1)').text());
email=($tr.find('td:eq(2)').text());
mobile=($tr.find('td:eq(3)').text());
arr['name']=name;arr['email']=email;arr['mobile']=mobile;
obj[val]=arr;
val++;
} else {
alert("please fill the form completely");
}

This question is so specific to the OP scenario, so i will try to make the answer a bit more general.
I'm no expert here, but it seems you already capture the user's input and cloned it when they click Add to a new td. Therefore from what I understood is that you need to edit/delete the data from the new created td.
We have a table that contains several fields. We want to apply the following action on them
1- Add
2- Edit
3- Delete
Maybe this isn't the best practice, in short, my approach for this was to insert two spans for each data value:
One hidden that contains an input text field (inputSpan).
Another just contains plain text value (dataSpan).
Whenever you want to edit, dataSpan (just a data container) will disappear and inputSpan (text input field) appears instead enabling you to edit the text field. Once you edit and click Save the data in the text field will be cloned to replace the data in dataSpan. So basically dataSpan is just a reflection to inputSpan text field.
Here is an updated demo:
JSFiddle >> FullView Fiddle
I suggest for readability purposes, you break your code down into small function, it will make life easier, just sayin. So here general logic for your idea:
deleteRow = function (trID) {
// delete code goes here, remove the row
$(trID).remove();
}
manageEdit = function (tdNo) {
if ($("#edit-btn" + tdNo).html() === "Edit") {
$("#save-btn" + tdNo).show();//show save button
$("#edit-btn" + tdNo).html("Cancel");//change edit to cancle
editRow(tdNo);//call edit function
} else if ($("#edit-btn" + tdNo).html() === "Cancel") {
$("#save-btn" + tdNo).hide();//hide save button
$("#edit-btn" + tdNo).html("Edit");//change back edit button to edit
cancelEditRow(tdNo);
}
}
editRow = function (tdNo) {
$(".inputSpan" + tdNo).show();//show text input fields
$(".dataSpan" + tdNo).hide();//hide data display
}
cancelEditRow = function (tdNo) {
//looop thru 3 input fields by id last digit
for (var i = 0; i < 3; i++) {
//get input span that contain the text field
var inputSpan = $("#inputSpan" + tdNo + "-" + i);
//get the data span that contain the display data
var dataSpan = $("#dataSpan" + tdNo + "-" + i);
//text field inside inputSpan
var textField = inputSpan.find('input:text');
inputSpan.hide();//hide input span
textField.val(dataSpan.html());//take original data from display span and put it inside text field to cncle changes.
dataSpan.show();//show data span instead of edit field
}
}
saveRow = function (tdNo) {
//same as edit, but we reverse the data selection.
for (var i = 0; i < 3; i++) {
var inputSpan = $("#inputSpan" + tdNo + "-" + i);
var dataSpan = $("#dataSpan" + tdNo + "-" + i);
var textField = inputSpan.find('input:text');
inputSpan.hide();
dataSpan.html(textField.val());//take data from text field and put into dataSpan
dataSpan.show();
}
$("#edit-btn" + tdNo).html("Edit");//change text to edit
$("#save-btn" + tdNo).hide();//hide same button.
}
Here where I add the spans:
var tdCounter = 0;
$(".span4").each(function () {
var tid = val+"-"+tdCounter;
$tr.append("<td id='#mytd"+tid+"'>
<span id='inputSpan"+tid+"' class='inputSpan"+val+"' style='display:none'>
<input type='text' id='#input"+tid+"' value='"+ $(this).val() + "' /></span>
<span id='dataSpan"+tid+"' class='dataSpan"+val+"'>"+$(this).val()+"</td>");
tdCounter++;
});
Here I just append the buttons to call the functions, each button works for it's own row:
$tr.append("<td><botton id='edit-btn" + val + "' class='btn' onclick=manageEdit('" + val + "');>Edit</botton></td>");
$tr.append("<td><botton style='display:none' id='save-btn" + val + "' class='btn' onclick=saveRow('" + val + "');>Save</botton></td>");
$tr.append("<td><botton id='delete-btn" + val + "' class='btn' onclick=deleteRow('" + trID + "');>Delete</botton></td>");

Below is a sample function, it wont do everyhing you need, but it shows the jquery functions and one possibility how to do it. I only enabled editing name field, and deleting.
You would have to add other fields, + copy id data for the input.
js Fiddle
window.deleteRow = function (tar) {
$(tar).parent().remove();
}
window.editRow = function (tar) {
var row = $(tar).parent(),
cells, name;
cells = row.find("td");
name = $(cells.get(1)).text();
$(cells.get(1)).text('');
$(cells.get(1)).append('<input type="text" value="' + name + '">');
}
window.saveData = function() {
var data = {};
data.name = "some name";//get this from your input
data.email= "some email";//get this from your input
data.phone= "some phone";//get this from your input
$.get("http://yourphpsite.com", data, function(data, status) {
//data contains your server response
if (data.somepositiveservermessage) {
$("#user_notification_field").text("data saved");
$("#user_notification_field").show();
});
}