validating at least one checkbox selected on dynamically added fields

validating at least one checkbox selected on dynamically added fields - javascript

If you're dynamically adding form fields to an existing form, what's the best way of adding validation?
Consider this fiddle: http://jsfiddle.net/yWGK4/
<form action="#" method="post">
<div id="parent">
<div class="child">
<input type="checkbox" name="box1[]" value="1" /> 1
<input type="checkbox" name="box1[]" value="2" /> 2
<input type="checkbox" name="box1[]" value="3" /> 3
</div>
</div>
</form>
<button id="addBoxes">Add Boxes</button>
<script>
$(function() {
var parentdiv = $('#parent');
var m = $('#parent div.child').size() + 1;
$('#addBoxes').on('click', function() {
$('<div class="child"><input type="checkbox" name="box'+m+'[]" value="1" /> 1 <input type="checkbox" name="box'+m+'[]" value="2" /> 2 <input type="checkbox" name="box'+m+'[]" value="3" /> 3 </div>').appendTo(parentdiv);
m++;
return false;
});
});
</script>
On that form I'm adding new checkbox groups, and want to make sure at least one box from each group is checked (not one box across all groups). Anyone got any clever methods? Everything I've looked at would get very complicated due to the dynamically added fields.

It doesn't matter if the checkboxes are dynamic when validating on submit etc. so something like this would check if at least one checkbox per .child is checked :
$('form').on('submit', function(e) {
e.preventDefault();
var valid = true;
$('.child').each(function() {
if ( ! $('[type="checkbox"]:checked', this).length ) // no box checked
valid = false;
});
if (valid) {
this.submit();
}else{
alert('error');
}
});
FIDDLE

If you want to check it using jQuery you can use `.each()
$(".child").each(function(){
var $this = $(this);
var checked = $this.find("input:checked");
if( checked.lenght == 0 ) {
alert("This group is not valid");
}
});
You can find more about this jQuery functions in this links:
each()
find()

here's what I came up with. Basically you loop over the .child groups and test if they have a checkbox in the checked state..
$('#checkBoxes').on('click', function(){
var uncheckedgroups = new Array();
$('.child').each(function(childindex, childelement){
var checkFound = 0;
$('.child').each(function(index, element){
if($(element).is(':checked')){
checkFound = 1;
}
});
if(checkFound == 0){
uncheckedgroups.push(childindex);
}
});
if(uncheckedgroups.length > 0){
alert("the following groups have no checked checkbox: " +
uncheckedgroups.join(','));
}
});

Related

jQuery loop each radio button not working

Very simple , this st**id tinny things will kill me.
I trying loop each radio button.
$('#recover input:radio:checked').each(function() {
alert("checked");
});
OR
function Checkform() {
var result = true;
$('#recover input[type=radio]').each(function() {
var checked = $(this).find('input:radio:checked');
if (checked.length == 0) {
result = false;
alert ("check");
}
});
return result;
}
OR
$('#recover input[type=radio]').each(function(){
if($(this).attr('checked')){
alert ("check");
}
});
HTML :
<div id="recover">
<input type="radio" name="s">
<input type="radio" name="s">
<input type="radio" name="s">
</div>
tryed also :
<div id="recover">
<form>
<input type="radio" name="s">
<input type="radio" name="s">
<input type="radio" name="s">
</form>
</div>
And:
<div id="recover">
<form>
<input type="radio" name="s" value="1">
<input type="radio" name="s" value="2">
<input type="radio" name="s" value="2">
</form>
</div>
And more combination of HTML .
And tryed more like 5 other examples of jQuery / Javascript, none working and i dont know why .
Any help please , thanks allot.

Use $(this).prop('checked') instead of $(this).attr('checked')
jsFiddle Demo
Attributes vs. Properties
...
Nevertheless, the most important concept to remember about the checked
attribute is that it does not correspond to the checked property. The
attribute actually corresponds to the defaultChecked property and
should be used only to set the initial value of the checkbox. The
checked attribute value does not change with the state of the
checkbox, while the checked property does. Therefore, the
cross-browser-compatible way to determine if a checkbox is checked is
to use the property:
if ( elem.checked )
if ( $( elem ).prop( "checked" ) )
if ( $( elem ).is( ":checked" ) )
The same is true for other dynamic attributes, such as selected and
value.

TRy this Demo
http://jsfiddle.net/devmgs/X6QhN/
function doCheck(){
$('#recover input[type="radio"]:checked').each(function() {
alert("checked");
});
}

use prop
because it gives true or false
and attr
gives property name like checked or not so cant use in condition
$('#recovery input[type=radio]').each(function(){
if($(this).prop('checked')){
alert ("check");
}
});
reference prop

$(document).ready(function(){
$('#recover > radio').each(function(){
if($(this).prop('checked')){
alert ("checked");
}
});
});

Try This
`
jQuery(function ()
{
if (jQuery('#recover input[name="s"]').is(':checked'))
{
alert("Checked"); }
else
{
alert("Please select an Record");
}
});`

You can access the checked property directly from the dom reference
$('#recover input[type=radio]').each(function () {
if (this.checked) { // or $(this).is(':checked')
alert("check");
}
});
If you want to process only checked items then use the :checked selector
$('#recover input[type=radio]:checked').each(function () {
alert("check");
});
Demo: Fiddle

jQuery - Checking Check Box Values (Chaining jQuery functions Vs If Statment)

I have multiple check boxes and wanting to get an overall value for them all.
For example if one is checked then value is true/selected.
If none are checked then false/unchecked.
My HTML is:
<input id="one" type="checkbox">
<input id="two" type="checkbox">
<input id="three" type="checkbox">
<input id="four" type="checkbox">
<button onclick="check();">Is checked (jQuery Chained)</button>
<button onclick="check2();">Is checked(Big If Statement)</button>
My JavaScript/jQuery is:
function check() {
var booleee = $('#one,#two,#three,#four').attr('checked');
alert("Checked: " + booleee);
}
function check2() {
if ($('#one').attr('checked') || $('#two').attr('checked') || $('#three').attr('checked') || $('#four').attr('checked')) {
alert("Checked: true");
}
alert("Checked: false");
}
Js Fiddle: Click Here
Please note, I have solved this problem. This question is more to help me understand why my checked2() function works and my check() doesnt.

var booleee = $('#one,#two,#three,#four').attr('checked'); checks only whether the first (in this case #one) checkbox is checked.
From the doc for attr
Get the value of an attribute for the first element in the set of
matched elements.
it should be
var booleee = $('#one,#two,#three,#four').filter(':checked').length > 0;
Also in new versions(>1.6) you need to use the property 'checked' (.prop('checked')) instead of attr in the alternative you have a :checked filter so .is(':checked').

Because it's not checking all the elements in the selector.
to make it work
function check() {
var booleee =$("input:checkbox:checked").length > 0;
alert("Checked: " + booleee);
}
To more specific selection add form id in selector
DEMO

A better approach: http://jsfiddle.net/arvind07/ZP78F/
function check() {
var checks = $('input:checkbox');
var checked = 0;
checks.each(function() {
if ($(this).is(":checked")) {
checked = 1;
return false;
}
});
if (checked) {
alert("Checked");
} else {
alert("Not checked");
}
}

in html set checked property
<input id="one" type="checkbox" checked="checked">
<input id="two" type="checkbox" checked="checked">
<input id="three" type="checkbox" checked="checked">
<input id="four" type="checkbox" checked="checked">
you not defined checked so it show undefined because it cant read this attribute and when you call second function then only false come in alert because their checkbox checked attribute not find
see demo

var checked = $(':checkbox:checked').length > 0;

Check to see if none of the checkboxes was checked in jquery

I have two checkboxes and one of the checkboxes must be checked. I can see that it's right, no syntax errors. What should be made to my code to check if none of the checkboxes were checked?
HTML :
<input type="checkbox" value="aa" class="first" name="a"> Yes<br/>
<input type="checkbox" value="bb" class="second" name="b"> No <br/>
<button type="submit">Go!</button>
<p class="error"></p>
JavaScript:
$('button').on('click',function(){
if( $(".first:not(:checked)") && $(".second:not(:checked)") ){
$('.error').text('You must select atleast one!');
}else
$('.error').hide();
});
Example : http://jsfiddle.net/ptbTq/

Check this fiddle: http://jsfiddle.net/692Dx/
Checking code:
if($('input[type="checkbox"]:checked').length == 0) {
alert('none checked');
}

You are using selectors which do not return boolean values which is what you need when writing an if condition. Here's what you could do:
$('button').on('click',function() {
if(!$(".first").is(":checked") && !$(".second").is(":checked")) {
$('.error').text('You must select atleast one!').show();
} else {
$('.error').hide();
}
});
or if you prefer and think it could be more readable you could invert the condiciton:
$('button').on('click',function() {
if($(".first").is(":checked") || $(".second").is(":checked")) {
$('.error').hide();
} else {
$('.error').text('You must select atleast one!').show();
}
});
Also notice that you need to .show() the error message in the first case as you are hiding it in the second.
And here's a live demo.

Short:
$("input[type=checkbox]").is(":checked")
returns true if:
one of your checkboxes - from the selector ("input[type=checkbox]") - is checked.
else return false
and in your case:
$(".first, .second").is(":checked")
Do something at least one of your checkboxes is checked

Put the same class on both checkboxes and you can do something like
if ($(':checkbox.the_class:checked').length > 0) {
// at least one checkbox is checked
// ...
}

The best would be to put your checkboxes inside a div with an unique ID so you can verify all the checkboxes in there, so your code will work in all cases. Even when adding new checkboxes to the div later on.
<div id="cb">
<input type="checkbox" value="aa" class="first" name="a" /> Yes<br/>
<input type="checkbox" value="bb" class="second" name="b" /> No <br/>
<button type="submit">Go!</button>
<p class="error"></p>
</div>
Your JQuery:
$('button').click(function() {
var checked_one = $('div#cb input[type="checkbox"]').is(':checked');
if (!checked_one )
$('.error').text('You must select atleast one!');
else
$('.error').hide();
});
Live demo can be seen here: http://jsfiddle.net/ptbTq/15/

Javascript: How can I make that if the user check a checkbox then all nested checkbox are selected too?

Let say I have this:
<input id="album" name="album" type="checkbox" value="1" />
<label for="album">Albums</label><br>
<ul>
<li>
<input id="albums_155596787784467" name="albums[155596787784467]" type="checkbox" value="1" />
<label for="albums_155596787784467">Profile Pictures</label><br>
</li>
<li>
<input id="albums_100358313308315" name="albums[100358313308315]" type="checkbox" value="1" />
<label for="albums_100358313308315">Perfil</label><br>
</li>
</ul>
When the user check the first checkbox I want that all checkboxes in the ul to be checked too.
Also, if any of the checkboxes inside the ul is set to not checked, then the first checkbox should be set to not checked too.
I use JQuery.
Edit:
Also, if all checkboxes inside the ulare checked, then the first checkbox should be checked too.

$("input[name='album']").change(function()
{
if( $(this).is(':checked') )
{
$("input[type='checkbox']","ul").attr('checked',true);
} else
{
$("input[type='checkbox']","ul").attr('checked',false);
}
});
Edited !
And for part 2 of your example :
$("input[type='checkbox']","ul").each(function()
{
$(this).change(function()
{
if( ! $(this).is(':checked') )
{
$("input[name='album']").attr('checked',false);
}
$("input[name='album']").attr('checked',( $("input[type='checkbox']","ul").length == $("input[type='checkbox']:checked","ul").length ));
});
});

Better to give the ul an id and try the below code.
$(function(){
$("#album").change(function(){
$("#ulid input:checkbox").attr("checked", this.checked);
});
var childCheckBoxes = $("#ulid input:checkbox");
var totalcheckBoxesCount = childCheckBoxes.length;
childCheckBoxes.change(function(){
var checkedBoxesCount = childCheckBoxes.filter(":checked").length;
$("#album").attr("checked", totalcheckBoxesCount === checkedBoxesCount);
});
});
Working demo

try this
$(document).ready(function(){
$("#album").click(function(){
if($('#album').is(':checked'))
$("input[type=checkbox]").attr('checked','checked');
else
$("input[type=checkbox]").removeAttr('checked')
});
});

How can I know which radio button is selected via jQuery?

I have two radio buttons and want to post the value of the selected one.
How can I get the value with jQuery?
I can get all of them like this:
$("form :radio")
How do I know which one is selected?

To get the value of the selected radioName item of a form with id myForm:
$('input[name=radioName]:checked', '#myForm').val()
Here's an example:
$('#myForm input').on('change', function() {
alert($('input[name=radioName]:checked', '#myForm').val());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm">
<fieldset>
<legend>Choose radioName</legend>
<label><input type="radio" name="radioName" value="1" /> 1</label> <br />
<label><input type="radio" name="radioName" value="2" /> 2</label> <br />
<label><input type="radio" name="radioName" value="3" /> 3</label> <br />
</fieldset>
</form>

Use this..
$("#myform input[type='radio']:checked").val();

If you already have a reference to a radio button group, for example:
var myRadio = $("input[name=myRadio]");
Use the filter() function, not find(). (find() is for locating child/descendant elements, whereas filter() searches top-level elements in your selection.)
var checkedValue = myRadio.filter(":checked").val();
Notes: This answer was originally correcting another answer that recommended using find(), which seems to have since been changed. find() could still be useful for the situation where you already had a reference to a container element, but not to the radio buttons, e.g.:
var form = $("#mainForm");
...
var checkedValue = form.find("input[name=myRadio]:checked").val();

This should work:
$("input[name='radioName']:checked").val()
Note the "" usaged around the input:checked and not '' like the Peter J's solution

You can use the :checked selector along with the radio selector.
$("form:radio:checked").val();

If you want just the boolean value, i.e. if it's checked or not try this:
$("#Myradio").is(":checked")

Get all radios:
var radios = jQuery("input[type='radio']");
Filter to get the one thats checked
radios.filter(":checked")

Another option is:
$('input[name=radioName]:checked').val()

$("input:radio:checked").val();

In my case I have two radio buttons in one form and I wanted to know the status of each button.
This below worked for me:
// get radio buttons value
console.log( "radio1: " + $('input[id=radio1]:checked', '#toggle-form').val() );
console.log( "radio2: " + $('input[id=radio2]:checked', '#toggle-form').val() );
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="toggle-form">
<div id="radio">
<input type="radio" id="radio1" name="radio" checked="checked" /><label for="radio1">Plot single</label>
<input type="radio" id="radio2" name="radio"/><label for="radio2">Plot all</label>
</div>
</form>

Here's how I would write the form and handle the getting of the checked radio.
Using a form called myForm:
<form id='myForm'>
<input type='radio' name='radio1' class='radio1' value='val1' />
<input type='radio' name='radio1' class='radio1' value='val2' />
...
</form>
Get the value from the form:
$('#myForm .radio1:checked').val();
If you're not posting the form, I would simplify it further by using:
<input type='radio' class='radio1' value='val1' />
<input type='radio' class='radio1' value='val2' />
Then getting the checked value becomes:
$('.radio1:checked').val();
Having a class name on the input allows me to easily style the inputs...

try this one.
it worked for me
$('input[type="radio"][name="name"]:checked').val();

In a JSF generated radio button (using <h:selectOneRadio> tag), you can do this:
radiobuttonvalue = jQuery("input[name='form_id\:radiobutton_id']:checked").val();
where selectOneRadio ID is radiobutton_id and form ID is form_id.
Be sure to use name instead id, as indicated, because jQuery uses this attribute (name is generated automatically by JSF resembling control ID).

Also, check if the user does not select anything.
var radioanswer = 'none';
if ($('input[name=myRadio]:checked').val() != null) {
radioanswer = $('input[name=myRadio]:checked').val();
}

If you have Multiple radio buttons in single form then
var myRadio1 = $('input[name=radioButtonName1]');
var value1 = myRadio1.filter(':checked').val();
var myRadio2 = $('input[name=radioButtonName2]');
var value2 = myRadio2.filter(':checked').val();
This is working for me.

I wrote a jQuery plugin for setting and getting radio-button values. It also respects the "change" event on them.
(function ($) {
function changeRadioButton(element, value) {
var name = $(element).attr("name");
$("[type=radio][name=" + name + "]:checked").removeAttr("checked");
$("[type=radio][name=" + name + "][value=" + value + "]").attr("checked", "checked");
$("[type=radio][name=" + name + "]:checked").change();
}
function getRadioButton(element) {
var name = $(element).attr("name");
return $("[type=radio][name=" + name + "]:checked").attr("value");
}
var originalVal = $.fn.val;
$.fn.val = function(value) {
//is it a radio button? treat it differently.
if($(this).is("[type=radio]")) {
if (typeof value != 'undefined') {
//setter
changeRadioButton(this, value);
return $(this);
} else {
//getter
return getRadioButton(this);
}
} else {
//it wasn't a radio button - let's call the default val function.
if (typeof value != 'undefined') {
return originalVal.call(this, value);
} else {
return originalVal.call(this);
}
}
};
})(jQuery);
Put the code anywhere to enable the addin. Then enjoy! It just overrides the default val function without breaking anything.
You can visit this jsFiddle to try it in action, and see how it works.
Fiddle

$(".Stat").click(function () {
var rdbVal1 = $("input[name$=S]:checked").val();
}

This works fine
$('input[type="radio"][class="className"]:checked').val()
Working Demo
The :checked selector works for checkboxes, radio buttons, and select elements. For select elements only, use the :selected selector.
API for :checked Selector

To get the value of the selected radio that uses a class:
$('.class:checked').val()

I use this simple script
$('input[name="myRadio"]').on('change', function() {
var radioValue = $('input[name="myRadio"]:checked').val();
alert(radioValue);
});

Use this:
value = $('input[name=button-name]:checked').val();

DEMO : https://jsfiddle.net/ipsjolly/xygr065w/
$(function(){
$("#submit").click(function(){
alert($('input:radio:checked').val());
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td>Sales Promotion</td>
<td><input type="radio" name="q12_3" value="1">1</td>
<td><input type="radio" name="q12_3" value="2">2</td>
<td><input type="radio" name="q12_3" value="3">3</td>
<td><input type="radio" name="q12_3" value="4">4</td>
<td><input type="radio" name="q12_3" value="5">5</td>
</tr>
</table>
<button id="submit">submit</button>

If you only have 1 set of radio buttons on 1 form, the jQuery code is as simple as this:
$( "input:checked" ).val()

I've released a library to help with this. Pulls all possible input values, actually, but also includes which radio button was checked. You can check it out at https://github.com/mazondo/formalizedata
It'll give you a js object of the answers, so a form like:
<form>
<input type="radio" name"favorite-color" value="blue" checked> Blue
<input type="radio" name="favorite-color" value="red"> Red
</form>
will give you:
$("form").formalizeData()
{
"favorite-color" : "blue"
}

JQuery to get all the radio buttons in the form and the checked value.
$.each($("input[type='radio']").filter(":checked"), function () {
console.log("Name:" + this.name);
console.log("Value:" + $(this).val());
});

To retrieve all radio buttons values in JavaScript array use following jQuery code :
var values = jQuery('input:checkbox:checked.group1').map(function () {
return this.value;
}).get();

try it-
var radioVal = $("#myform").find("input[type='radio']:checked").val();
console.log(radioVal);

Another way to get it:
$("#myForm input[type=radio]").on("change",function(){
if(this.checked) {
alert(this.value);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm">
<span><input type="radio" name="q12_3" value="1">1</span><br>
<span><input type="radio" name="q12_3" value="2">2</span>
</form>

From this question, I came up with an alternate way to access the currently selected input when you're within a click event for its respective label. The reason why is because the newly selected input isn't updated until after its label's click event.
TL;DR
$('label').click(function() {
var selected = $('#' + $(this).attr('for')).val();
...
});
$(function() {
// this outright does not work properly as explained above
$('#reported label').click(function() {
var query = $('input[name="filter"]:checked').val();
var time = (new Date()).toString();
$('.query[data-method="click event"]').html(query + ' at ' + time);
});
// this works, but fails to update when same label is clicked consecutively
$('#reported input[name="filter"]').on('change', function() {
var query = $('input[name="filter"]:checked').val();
var time = (new Date()).toString();
$('.query[data-method="change event"]').html(query + ' at ' + time);
});
// here is the solution I came up with
$('#reported label').click(function() {
var query = $('#' + $(this).attr('for')).val();
var time = (new Date()).toString();
$('.query[data-method="click event with this"]').html(query + ' at ' + time);
});
});
input[name="filter"] {
display: none;
}
#reported label {
background-color: #ccc;
padding: 5px;
margin: 5px;
border-radius: 5px;
cursor: pointer;
}
.query {
padding: 5px;
margin: 5px;
}
.query:before {
content: "on " attr(data-method)": ";
}
[data-method="click event"] {
color: red;
}
[data-method="change event"] {
color: #cc0;
}
[data-method="click event with this"] {
color: green;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="reported">
<input type="radio" name="filter" id="question" value="questions" checked="checked">
<label for="question">Questions</label>
<input type="radio" name="filter" id="answer" value="answers">
<label for="answer">Answers</label>
<input type="radio" name="filter" id="comment" value="comments">
<label for="comment">Comments</label>
<input type="radio" name="filter" id="user" value="users">
<label for="user">Users</label>
<input type="radio" name="filter" id="company" value="companies">
<label for="company">Companies</label>
<div class="query" data-method="click event"></div>
<div class="query" data-method="change event"></div>
<div class="query" data-method="click event with this"></div>
</form>

$(function () {
// Someone has clicked one of the radio buttons
var myform= 'form.myform';
$(myform).click(function () {
var radValue= "";
$(this).find('input[type=radio]:checked').each(function () {
radValue= $(this).val();
});
})
});

Develop Reference

JavaScript is the programming language of the Web.

validating at least one checkbox selected on dynamically added fields - javascript

If you want to check it using jQuery you can use `.each() $(".child").each(function(){ var $this = $(this); var checked = $this.find("input:checked"); if( checked.lenght == 0 ) { alert("This group is not valid"); } }); You can find more about this jQuery functions in this links: each() find()

Related

jQuery loop each radio button not working

jQuery - Checking Check Box Values (Chaining jQuery functions Vs If Statment)

Check to see if none of the checkboxes was checked in jquery

Javascript: How can I make that if the user check a checkbox then all nested checkbox are selected too?

How can I know which radio button is selected via jQuery?

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