Develop Reference

cost splitter javascript app

I am trying to make a cost splitter app for my roommates. I am explaining the app with an example. Suppose we are 4 members, there is a cost of 300, and 3 members (m1, m3, m4) participated in the expenditure (all have an equal share). Among them 2 members have paid the amount as follows: m3 paid 180 and m4 paid 120. Now the balance sheet will look like this:
m1(-100), m2(0), m3(+80), m4(+20)
I am not able to get all the form values properly and make the balance sheet.
<div>
<table id="dashboard">
<tr>
<th>TOTAL</th>
<th>member1</th>
<th>member2</th>
<th>member3</th>
<th>member4</th>
</tr>
<tr>
<td id="total"></td>
<td id="bmem1">0</td>
<td id="bmem2">0</td>
<td id="bmem3">0</td>
<td id="bmem4">0</td>
</tr>
</table>
</div>
<div id="newCostButton">
<button id="showForm" href="#">Add New Cost</button>
</div>
<form id="elForm">
<label>Cost:</label>
<input type="text" id="cost" placeholder="Add new cost">
<br>
<label><b>Participants:</b></label><br>
<span>member1</span>
<input type="checkbox" name="Participant" value="member1">
<span>member2</span>
<input type="checkbox" name="Participant" value="member2">
<span>member3</span>
<input type="checkbox" name="Participant" value="member3">
<span>member4</span>
<input type="checkbox" name="Participant" value="member4">
<br>
<b>contributors:</b><br>
member1
<input class= "contributors" type="text" name="member1">
member2
<input class= "contributors" type="text" name="member2">
member3
<input class= "contributors" type="text" name="member3">
member4
<input class= "contributors" type="text" name="member4">
<input type="submit" id="cal" value="calculate">
</form>
<div id="doc"></div>
<script>
$(function(){
var $newCostButton = $('#newCostButton');
var $elForm = $('#elForm');
var $cost = $('#cost');
$newCostButton.show();
$elForm.hide();
$newCostButton.on('click', function(){
$newCostButton.hide();
$elForm.show();
});
$('input:text').focus(function(){
$(this).val("");
});
function cal(){
var c = $cost.val();
var part = $('input:checked');
pCount = part.length;
var d= parseInt(c/pCount);
var contributors = $('.contributor');
var mem = [];
contributors.each(function(){
mem.push(parseInt($(this).val()));
});
console.log(mem);
for(var i=0;i<pCount;i++){
var r = mem[i]-d;
console.log(r);
}
}
$elForm.on('submit', function(e){
e.preventDefault();
cal();
});
</script>

I don't see where you import jquery
<script
src="https://code.jquery.com/jquery-3.3.1.min.js"
integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
crossorigin="anonymous"></script>
why don't you use excel or google sheets?

I think this does something similar to what you are asking for. I simplified a few things like .hide() and .show(), but they're easy enough to add back. Hopefully something in here helps. If not, it was still a fun hour code challenge.
html:
<div>
<table class="dashboard">
<tr>
<th>TOTAL</th>
<th>member1</th><th>member2</th><th>member3</th<th>member4</th>
</tr>
<tr>
<td>0</td><td>0</td><td>0</td><td>0</td><td>0</td>
</tr>
</table>
</div>
<div class="newCost">
<span>Cost:</span><input type="text" placeholder="Add New Cost">
<button>Add New Cost</button>
</div>
<div class="participants">
<p>Participants:</p>
<span>member1</span><input type="checkbox">
<span>member2</span><input type="checkbox">
<span>member3</span><input type="checkbox">
<span>member4</span><input type="checkbox">
</div>
<div class="contributors">
<p>Contributors:</p>
member1 <input type="text">
member2 <input type="text">
member3 <input type="text">
member4 <input type="text">
</div>
<button class="calculate">calculate</button>
javascript:
String.prototype.toInt = function() { return parseInt(this, 10); };
$('.newCost button').on('click', function() {
let newCost = $('.newCost input').val().toInt();
$('.dashboard td')
.each(function(index, td) {
td.textContent = td.textContent.toInt() + (index ? newCost / 4 : newCost);
});
});
$('button.calculate').on('click', function() {
$('.participants input').each(function(index){
if (this.checked) {
this.checked = false;
let currentOwed = $(`.dashboard td:eq(${index + 1})`).text().toInt();
let contributed = $(`.contributors input:eq(${index})`).val().toInt();
let total = $('.dashboard td:eq(0)').text().toInt();
$('.dashboard td:eq(0)').text(total -= contributed);
$(`.dashboard td:eq(${index + 1})`).text(currentOwed -= contributed);
}
});
});
$('button').click(()=> { $('input[type=text]').val(''); });
https://jsfiddle.net/wn7bbxjk/

JavaScript - How to place asterisk in the right side of the text box?

I want to place asterisk in the right side of the each text box individually when I am submitting the empty form/field. The code is working but asterisk is displaying in the end of the form.
This is my code:
[<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252" />
<title></title>
<style type="text/css">
body { font-family:arial, helvetica, sans-serif; font-weight:bold; font-size:13px; color:#000; text-align:left; margin:3px 0px; }
input { text-align:center; border:2px solid #CCC; }
#wrap { width:400px; height:200px; margin:20px; padding:10px; }
#une { margin-top:10px; }
#reg {margin-top:10px; }
.a13B { color:#F00; }
.cntr { text-align:center; }
</style>
</head>
<body>
<div id="wrap">
<form id="regform" name="registerationform" method="POST">
<table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="300">
<tr>
<td>First Name: </td>
<td class="cntr">
<input type="text" name="fnametxt" size="20"></td>
</tr>
<tr>
<td>Second Name: </td>
<td class="cntr">
<input type="text" name="snametxt" size="20"> </td>
</tr>
<tr>
<td>User Name:</td>
<td class="cntr">
<input type="text" name="unametxt" size="20"> </td>
</tr>
<tr>
<td>Email Address: </td>
<td class="cntr">
<input type="text" name="emailtxt" size="20"> </td>
</tr>
<tr>
<td>Password : </td>
<td class="cntr"><input type="password" name="pwdtxt" size="20"> </td>
</tr>
<tr>
<td>Confirm : </td>
<td class="cntr"><input type="password" name="cpwdtxt" size="20"> </td>
</tr>
</table>
<input id="reg" name="reg" type="button" onclick="regvalidate(this.form)" value="Register Now">
</form>
<div id="une" class="a13B">
</div>
</div>
<!-- end wrap -->
<script type="text/javascript">
var uneObj=document.getElementById("une"); // object ref to msg line
var currentBrdObj;
//
function regvalidate(formObj)
{ uneObj.innerHTML=""; // clear msg line before resubmitting
// gather object ref to input boxes
var allInputs=document.getElementById("regform").getElementsByTagName("input");
// check if value of box is ""
for(var i=0;i<allInputs.length;i++)
{ if(allInputs\[i\].name !="reg") // ignore submit button
{ if(allInputs\[i\].value=="")
{ uneObj.innerHTML=msg\[i\];
if(currentBrdObj){currentBrdObj.style.border="2px solid #CCC"; }
allInputs\[i\].style.border="2px solid #F00";
currentBrdObj=allInputs\[i\];
allInputs\[i\].onclick=function(){ this.style.border="2px solid #CCC"; }
return;
} } }
// check if password and confirm are the same
if((formObj.pwdtxt.value) != (formObj.cpwdtxt.value))
{ uneObj.innerHTML = msg\[msg.length-1\]; // last msg in array
formObj.pwdtxt.value = ""; formObj.pwdtxt.style.border="";
formObj.cpwdtxt.value = ""; formObj.cpwdtxt.style.border="";
return;
}
// all ok so submit form
uneObj.innerHTML = "All ok so submitting form";
formObj.submit();
}
// -----
var msg =\["*","*",
"*","*",
"*","*"\];
msg\[msg.length\]="Passwords must be equal.<br>Please type a password";
//
</script>
</body>
</html>][1]
#PawanKumar
Here is your code:
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$('#submitBtn').on('click', function(e) {
debugger;
e.preventDefault();
var fields = document.getElementsByTagName('input');
for (var i = 0; i < fields.length; i++) {
if (fields[i].hasAttribute('required')) {
if (fields[i].value == "") {
fields[i].classList.add('redBorder');
$(fields[i]).after('*');
} else {
fields[i].classList.remove('redBorder');
}
}
}
});
});
</script>
<style>
.redBorder {
border: 2px solid red;
border-radius: 2px;
}
</style>
</head>
<form novalidate>
<input type="text" placeholder="first name" required/><br/><br/>
<input type="text" placeholder="last name" /><br/><br/>
<button id="submitBtn" value="Submit">Submit</button>
</form>
</html>

Use span element to display asterisk at the end of text box. Try this :
<input type="text" id="name"/> <span style="color:red"> * </span>
Hope this solves your requirement.

Why bother with all that mess?
<input type="text" name="fnametxt" required />*
<input type="email" name="emailtxt" required />*
<input type="submit" value="Register" />
JavaScript required: none at all

With the help of jquery after() method, you can achieve this.
$(fields[i]).after("<span class='redColor'>*</span>");
I have also added code to show red border for required input field.
Note: If you use <form> tag, then HTML5 will automatically does the validation and your script will not execute, so to prevent that use novalidate attribute in the form tag or just remove the form tag.
$(document).ready(function() {
$('#submitBtn').on('click', function(e) {
e.preventDefault();
var fields = document.getElementsByTagName('input');
for (var i = 0; i < fields.length; i++) {
if (fields[i].hasAttribute('required')) {
if (fields[i].value == "") {
fields[i].classList.add('redBorder');
$(fields[i]).after("<span class='redColor'>*</span>");
} else {
fields[i].classList.remove('redBorder');
}
}
}
});
});
.redBorder {
border: 2px solid red;
border-radius: 2px;
}
.redColor{
color:red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form novalidate>
<input type="text" placeholder="first name" required/><br/><br/>
<input type="text" placeholder="last name" /><br/><br/>
<button id="submitBtn" value="Submit">Submit</button>
</form>

force form submit button click with jquery

Trying to trigger the submit functionality from JQuery. what am I doing wrong? In theory, this should work. I've tried about 4 different ways though.
I have tried
$('input#submit').trigger("click");
$( form:first ).submit();
$( form:first ).trigger("submit");
$('form#databaseActionForm').submit();
NOTHNG HAS WORKED (YET)?!
CODE:
<html lang="en">
<head>
<title>Database Management</title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<script src="http://code.jquery.com/jquery-3.1.0.min.js" integrity="sha256-cCueBR6CsyA4/9szpPfrX3s49M9vUU5BgtiJj06wt/s=" crossorigin="anonymous"></script>
<style>
table td { border: 1px solid black; }
table td:first-child { text-align: left; }
</style>
<script>
<!--
$(document).ready(function() {
$('#erase').click(function() {
if (confirm("Are you sure that you want to ERASE ALL DATA from the database?"))
{
$('#buttonTypePressed').val("erase");
$('input#submit').trigger("click"); <!-- HERE -->
}
});
$('#update').click(function() {
var appID = $('#updateAppID').val();
var field = $('#fieldName').val();
var value = $('#newValue').val();
if (appID == null || appID == "") {
alert("You must enter the ID number of the entry you wish to modify.");
$('#updateAppID').focus();
}
else if (field == null || field == "") {
alert("You must choose which field you wish to modify.");
$('#fieldName').focus();
}
else if (value == null || value == "") {
alert("You must choose the new value you wish to appear in the database.");
$('#newValue').focus();
}
else {
$('#buttonTypePressed').val("update");
$('input#submit').trigger("click"); <!-- HERE -->
}
});
$('#delete').click(function() {
var appID = $('#deleteAppID').val();
if (appID == null || appID == "") {
alert("You must enter the ID number of the entry you wish to delete.");
$('#deleteAppID').focus();
}
else {
$('#buttonTypePressed').val("delete");
$('input#submit').trigger("click"); <!-- HERE -->
}
});
});
-->
</script>
</head>
<body>
<div id="container">
<from id="databaseActionForm" name="databaseActionForm" method="POST" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>">
<table border=0 style="margin: 50px auto; text-align: right;">
<tr style="text-align: center; font-weight: bold; font-size: 1.5em; text-decoration: underline;">
<th>Action</th>
<th>Additional Info</th>
<th>Button</th>
</tr>
<tr name="Clear">
<td>Erase Database</td>
<td style="text-align: center;">ARE YOU SURE?</td>
<td><input type="button" id="erase" name="erase" value="ERASE ALL?" /></td>
</tr>
<tr name="Update">
<td>Update Value</td>
<td>
Entry ID: <input type="text" id="updateAppID" name="updateAppID" placeholder="App entryID" /><br />
Field Name: <input type="text" id="fieldName" name="fieldName" placeholder="Field to change" /><br />
New Value: <input type="text" id="newValue" name="newValue" placeholder="New value" /><br />
</td>
<td><input type="button" id="update" name="update" value="Update Value" /></td>
</tr>
<tr name="Delete">
<td>Delete Payment</td>
<td>
Entry ID: <input type="text" id="deleteAppID" name="deleteAppID" placeholder="App entryID" />
</td>
<td><input type="button" id="delete" name="delete" value="Delete Entry" /></td>
</tr>
</table>
<input type="hidden" id="buttonTypePressed" name="buttonTypePressed" />
<input type="submit" id="submit" name="submit" value="submit" style="position: absolute; left: -9999px; width: 1px; height: 1px;" tabindex="-1"/>
</form>
</div>
</body>

There are 2 issues here, 1 is a typo in the element name form, you have it as from.
Another is the name/id of the submit button, it should not be submit as it will override the default submit property(the function) of the form element
<input type="submit" id="bsubmit" name="bsubmit" value="submit" style="position: absolute; left: -9999px; width: 1px; height: 1px;" tabindex="-1" />
Then just use the below snippet to submit the form
$('#databaseActionForm').submit();
Demo: Fiddle

I think the problem is you misspelled "form" as "from". Check the syntax highlighting. After that, any of these will work:
$('form#databaseActionForm').submit();
$('#databaseActionForm').submit(); // referencing the form's ID
document.databaseActionForm.submit(); // referencing the form's NAME

check box code not working

<script>
function edit(em) {
var ch = em.value;
var ed = $("td.td" + ch).value;
if ($(ed).is(: checked)) {
$(this).show();
} else {
$(this).hide();
}
}
</script>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
</head>
<body>
<input type="checkbox" value="25" onclick="edit(this)">
<input type="checkbox" value="26" onclick="edit(this)">
<input type="checkbox" value="27" onclick="edit(this)">
<table>
<tr>
<td class="td25" value="25">Edit</td>
<td class="td26" value="26">Edit</td>
<td class="td27" value="27">Edit</td>
</tr>
</table>
</body>
</html>

here is a bug:
if($(ed).is(:checked))...
shoul be:
if($(ed).is(':checked'))...

Following is what you are trying to do.
$('input[type="checkbox"]').click(function() {
var ch = this.value;
if ($(this).is(':checked')) {
$(".td" + ch).hide();
}
else
{
$(".td" + ch).show();
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
</head>
<body>
<input type="checkbox" value="25" >
<input type="checkbox" value="26" >
<input type="checkbox" value="27" >
<table>
<tr>
<td class="td25" value="25">Edit25</td>
<td class="td26" value="26">Edit26</td>
<td class="td27" value="27">Edit27</td>
</tr>
</table>
</body>
</html>

This is what I think you're trying to do:
function edit(em) {
var ch = em.value;
var ed = $("td.td" + ch);
if ($(em).is(':checked')) {
ed.show();
} else {
ed.hide();
}
}
If that's what you're trying to achieve, then here are things you weren't doing right:
As #yangguang said, you were missing quotes for checked (':checked')
You wanted to take td not its value.
You were checking whether td (or its value) is checked which
instead you should have done it for the checkbox.
$(this) refers to the checkbox, but you wanted to show/hide the td

Radio buttons group

I have a radio buttons group, and I trying to show button if 5 radio checked, but i cant do that. Here is my code:
$(document).ready(function () {
$('#vote_submit_button').hide();
var unanswered = new Array();
$('table').each(function () {
var question = $(this).find('input').attr('name');
if (!$(this).find('input').is(':checked')) {
unanswered.push(question);
}
});
if (unanswered.length > 0) {
} else {
$('#vote_submit_button').show();
}
});
Help please)

Your code is running on document ready at which point of course all questions will be unanswered.
you need to bind an event handler to the radio buttons
$(function(){
$('#vote_submit_button').hide();
var answered = new Array();
$('input:radio').change(function(){
var $this= $(this);
if ($this.is(':checked')){
anwered.push($this.attr('name'));
}
if (answered.length == $('table').length) {
$('#vote_submit_button').show();
}
});
});

<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
$(document).ready(function () {
$(".radio").click(function(){
$('#vote_submit_button').hide();
var unanswered = new Array();
$('table').each(function () {
var question = $(this).find('input').attr('name');
if (!$(this).find('input').is(':checked')) {
unanswered.push(question);
}
});
if (unanswered.length > 0) {
} else {
$('#vote_submit_button').show();
}
});
});
</script>
<table>
<tr><td>
<input type="radio" name="radio1" class="radio">
</td></tr>
</table>
<table>
<tr><td>
<input type="radio" name="radio2" class="radio">
</td></tr>
</table>
<table>
<tr><td>
<input type="radio" name="radio3" class="radio">
</td></tr>
</table>
<table>
<tr><td>
<input type="radio" name="radio4" class="radio">
</td></tr>
</table>
<table>
<tr><td>
<input type="radio" name="radio5" class="radio">
</td></tr>
</table>
<input type="button" id="vote_submit_button" value="submit" style="display:none;">