Make only one checkbox mutually exclusive in html - javascript

I am looking to create a list of checkboxes that a user can select and at the bottom of the list a separate checkbox that is labeled as none so that when a user selects that checkbox, all the other checkboxes are unticked. Additionally, when the none checkbox is selected and one of the other options is selected, the none checkbox gets deselected.

Fairly straightforward; add change events to everything and just uncheck as necessary
var cbs = document.querySelectorAll(".option")
var none = document.querySelector(".none")
cbs.forEach(cb => {
cb.addEventListener("change", () => {
if(cb.checked)
none.checked = false
})
})
none.addEventListener("change", () => {
if(none.checked) {
cbs.forEach(cb => cb.checked = false);
}
})
<div><input type="checkbox" class="option">1</div>
<div><input type="checkbox" class="option">2</div>
<div><input type="checkbox" class="option">3</div>
<div><input type="checkbox" class="option">4</div>
<hr>
<div><input type="checkbox" class="none">none</div>

this way..
myForm.oninput = e => {
if (e.target === myForm.none && myForm.none.checked )
myForm.querySelectorAll('input[type=radio]').forEach(r=>r.checked=false)
else if (e.target.matches('input[type=radio]') && e.target.checked)
myForm.none.checked = false
}
demo:
const myForm = document.forms['my-form']
myForm.oninput = e =>
{
if (e.target === myForm.none && myForm.none.checked )
{
myForm.querySelectorAll('input[type=radio]').forEach(r=>r.checked=false)
}
else if (e.target.matches('input[type=radio]') && e.target.checked)
{
myForm.none.checked = false
}
}
myForm.onsubmit = e =>
{
e.preventDefault() // disable submit (page reload)
console.clear()
let formInputs = Object.fromEntries( new FormData(myForm).entries() )
console.log( formInputs )
}
body {
font-family : Helvetica, Arial sans-serif;
font-size : 12px;
}
form { width : 22em; }
fieldset { margin: .7em;}
.as-console-wrapper { max-height:100% !important; top:0; left:50% !important; width:50%; }
.as-console-row { background-color: yellow; }
.as-console-row::after { display:none !important; }
<form name="my-form">
<label><input type="checkbox" name="none"> none </label>
<fieldset>
<legend>group A</legend>
<label><input type="radio" name="radioA" value="a1"> A 1</label>
<label><input type="radio" name="radioA" value="a2"> A 2</label>
<label><input type="radio" name="radioA" value="a3"> A 3</label>
<label><input type="radio" name="radioA" value="a4"> A 4</label>
</fieldset>
<fieldset>
<legend>group B</legend>
<label><input type="radio" name="radioB" value="b1"> B 1</label>
<label><input type="radio" name="radioB" value="b2"> B 2</label>
<label><input type="radio" name="radioB" value="b3"> B 3</label>
<label><input type="radio" name="radioB" value="b4"> B 4</label>
</fieldset>
<fieldset>
<legend>group C</legend>
<label><input type="radio" name="radioC" value="c1"> C 1</label>
<label><input type="radio" name="radioC" value="c2"> C 2</label>
<label><input type="radio" name="radioC" value="c3"> C 3</label>
<label><input type="radio" name="radioC" value="c4"> C 4</label>
</fieldset>
<button type="submit">submit</button>
</form>

Related

Condition: input:checked with the same class

I would like to have a little help on an enigma that I have.
I have a button that changes according to the number of input:checked
but I would like to add a condition which is: select of the checkboxes of the same class.
for example can I have 2 or more input.
<input class="banana" type="checkbox" value="Cavendish">
<input class="banana" type="checkbox" value="Goldfinger">
<input class="chocolato" type="checkbox" value="cocoa powder">
<input class="chocolato" type="checkbox" value="milk chocolate">
<input class="apple" type="checkbox" value="honneycrisp">
<input class="apple" type="checkbox" value="granny smith">
I can't use attribute name or value. it is not possible to modify the inputs.
the condition:
$('input[type="checkbox"]').click(function(){
if($('input[type="checkbox"]:checked').length >=2){
////////
if (my classes are the same) {
$('#btn').html("click me").prop('disabled', false);
} else {
$('#btn').html("too bad").prop('disabled', true);
}
//////
}
I try with
var checkClass = [];
$.each($("input[type="checkbox"]:checked"), function() {
checkClass.push($(this).attr('class'));
});
I don't know if I'm going the right way or if I'm complicating the code but a little help would be welcome. For the moment my attempts have been unsuccessful.
The following function will reference the first checkbox that's checked className and enable each checkbox that has said className whilst disabling all other checkboxes. Details are commented in Snippet.
// All checkboxes
const all = $(':checkbox');
// Any change event on any checkbox run function `matchCategory`
all.on('change', matchCategory);
function matchCategory() {
// All checked checkboxes
const checked = $(':checkbox:checked');
let category;
// if there is at least one checkbox checked...
if (checked.length > 0) {
// ...enable (.btn)...
$('.btn').removeClass('off');
// ...get the class of the first checked checkbox...
category = checked[0].className;
// ...disable ALL checkboxes...
all.attr('disabled', true);
// ...go through each checkbox...
all.each(function() {
// if THIS checkbox has the class defined as (category)...
if ($(this).is('.' + category)) {
// ...enable it
$(this).attr('disabled', false);
// Otherwise...
} else {
// ...disable and uncheck it
$(this).attr('disabled', true).prop('checked', false);
}
});
// Otherwise...
} else {
// ...enable ALL checkboxes...
all.attr('disabled', false);
// ...disable (.btn)
$('.btn').addClass('off');
}
return false;
}
.off {
pointer-events: none;
opacity: 0.4;
}
<input class="beverage" type="checkbox" value="Alcohol">
<label>🍸</label><br>
<input class="beverage" type="checkbox" value="Coffee">
<label>☕</label><br>
<input class="dessert" type="checkbox" value="cake">
<label>🍰</label><br>
<input class="dessert" type="checkbox" value="Ice Cream">
<label>🍨</label><br>
<input class="appetizer" type="checkbox" value="Salad">
<label>🥗</label><br>
<input class="appetizer" type="checkbox" value="Bread">
<label>🥖</label><br>
<button class='btn off' type='button '>Order</button>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
some thing like that ?
const
bt_restart = document.getElementById('bt-restart')
, chkbx_all = document.querySelectorAll('input[type=checkbox]')
;
var checked_class = ''
;
bt_restart.onclick = _ =>
{
checked_class = ''
chkbx_all.forEach(cbx=>
{
cbx.checked=cbx.disabled=false
cbx.closest('label').style = ''
})
}
chkbx_all.forEach(cbx=>
{
cbx.onclick = e =>
{
if (checked_class === '') checked_class = cbx.className
else if (checked_class != cbx.className )
{
cbx.checked = false
cbx.disabled = true
cbx.closest('label').style = 'color: grey'
}
}
})
<button id="bt-restart">restart</button> <br> <br>
<label> <input class="banana" type="checkbox" value="Cavendish" > a-Cavendish </label> <br>
<label> <input class="banana" type="checkbox" value="Goldfinger" > a-Goldfinger </label> <br>
<label> <input class="chocolato" type="checkbox" value="cocoa powder" > b-cocoa powder </label> <br>
<label> <input class="chocolato" type="checkbox" value="milk chocolate"> b-milk chocolate </label> <br>
<label> <input class="apple" type="checkbox" value="honneycrisp" > c-honneycrisp </label> <br>
<label> <input class="apple" type="checkbox" value="granny smith" > c-granny smith </label> <br>
In fact it's like a Matching Pairs card game
this answer is without global checked_group variable, and respecting epascarello message about data attribute see also usage.
Adding a repentance on uncheck elements
const
bt_restart = document.getElementById('bt-restart')
, chkbx_all = document.querySelectorAll('input[type=checkbox]')
;
function clearGame()
{
chkbx_all.forEach(cbx=>
{
cbx.checked = cbx.disabled = false
cbx.closest('label').style = ''
})
}
bt_restart.onclick = clearGame
chkbx_all.forEach(cbx=>
{
cbx.onclick = e =>
{
let checkedList = document.querySelectorAll('input[type=checkbox]:checked')
if (cbx.checked)
{
let checked_group = ''
checkedList.forEach(cEl=>{ if (cEl !== cbx) checked_group = cEl.dataset.group })
if (checked_group === '') checked_group = cbx.dataset.group
else if (checked_group !== cbx.dataset.group )
{
cbx.checked = false // you need to uncheck wrong group checkboxes for preserving checkedList
cbx.disabled = true
cbx.closest('label').style = 'color: grey'
}
}
else if (checkedList.length === 0) // case of cheked repentir
clearGame()
}
})
<button id="bt-restart">restart</button> <br> <br>
<label> <input data-group="banana" type="checkbox" value="Cavendish" > a-Cavendish </label> <br>
<label> <input data-group="banana" type="checkbox" value="Goldfinger" > a-Goldfinger </label> <br>
<label> <input data-group="chocolato" type="checkbox" value="cocoa powder" > b-cocoa powder </label> <br>
<label> <input data-group="chocolato" type="checkbox" value="milk chocolate"> b-milk chocolate </label> <br>
<label> <input data-group="apple" type="checkbox" value="honneycrisp" > c-honneycrisp </label> <br>
<label> <input data-group="apple" type="checkbox" value="granny smith" > c-granny smith </label> <br>

Change src related to "Radio Button Checks"

In my project I want change src part (ar-button's src) related to my radio buttons check.
For ex: When you check "Option 1" I want to change src part on ar-button. Than when you check Option3x(with checked option1 and option1x) I want to change src again.
I mean for all 64 combination of checks I want to change src.
Any help or suggestion would be great!
Thanks..
<label>
<input type="radio" id="diffuse" name="kumas" value="textues/kumas/2/pgwfpjp_2K_Albedo.jpg"checked>
Option1
</label>
<label>
<input type="radio"id="adiffuse" name="kumas" value="textues/kumas/1/oi2veqp_2K_Albedo.jpg">
Option 2
</label>
<label>
<input type="radio" id="bdiffuse"name="kumas" value="textues/kumas/3/sjfvce3c_2K_Albedo.jpg">
Option 3
</label>
<label>
<input type="radio" id="cdiffuse"name="kumas" value="textues/kumas/4/sjfvcjzc_2K_Albedo.jpg">
Option 4
</label>
<br><br>
<label>
<input type="radio" id="diffuse1" name="kol" value="textues\kol\1\teqbcizc_2K_Albedo.jpg" checked>
Option 1x
</label>
<label>
<input type="radio" id="adiffuse1" name="kol" value="textues\kol\2\tfjbderc_2K_Albedo.jpg">
Option 2x
</label>
<label>
<input type="radio" id="bdiffuse1"name="kol" value="textues\kol\3\tcnodi3c_2K_Albedo.jpg">
Option 3x
</label>
<label>
<input type="radio" id="cdiffuse1"name="kol" value="textues\kol\4\tcicdebc_2K_Albedo.jpg">
Option 4x
</label>
</div>
</div>
</div>
<br><br>
<label>
<input type="radio" id="diffuse2" name="dugme" value="textues\metal\1\scksebop_2K_Albedo.jpg" checked>
Option 1z
</label>
<label>
<input type="radio" id="adiffuse2" name="dugme" value="textues\metal\2\se4objgc_2K_Albedo.jpg">
Option 2z
</label>
<label>
<input type="radio" id="bdiffuse2"name="dugme" value="textues\metal\3\se4pcbbc_2K_Albedo.jpg">
Option 3z
</label>
<label>
<input type="radio" id="cdiffuse2"name="dugme" value="textues\metal\4\shkxcgfc_2K_Albedo.jpg">
Option 4z
</label>
<br><br>
<ar-button
id="change" src="https://basebros.com/models/ar_base_tekli_koltuk_3d.glb"
id="change2 ios-src="https://basebros.com/models/ar_base_tekli_koltuk_3d.usdz"
title="3D-AR by BASE">
<img class="arbuttonicon" src="Assets/evindebutton.png" width="170px" alt="AR-icon">
</ar-button>
Try using this code:
const kumas = document.getElementsByName("kumas");
const kol = document.getElementsByName("kol");
const dugme = document.getElementsByName("dugme");
const arButton = document.querySelector("ar-button");
let sources = [[[],[],[],[]],[[],[],[],[]],[[],[],[],[]],[[],[],[],[]]]; /* Fill this with the sources. The first element is if the first option for kumas is selected, the second is for if the second option is selected, etc. The elements inside those elements are for each of the different options for kol, and the elements inside those elements are for each of the different options for dugme. */
function foo() {
let kumasSelected;
let kolSelected;
let dugmeSelected;
for(let i of kumas) {
if(i.checked) {
kumasSelected = kumas.indexOf(i);
}
}
for(let i of kol) {
if(i.checked) {
kolSelected = kol.indexOf(i);
}
}
for(let i of dugme) {
if(i.checked) {
dugmeSelected = dugme.indexOf(i);
}
}
arButton.src = sources[kumasSelected][kolSelected][dugmeSelected];
}
Run the function each time you want to update the source.
<label>
<input type="radio" id="diffuse" name="kumas" value="textues/kumas/2/pgwfpjp_2K_Albedo.jpg"checked>
Option1
</label>
<label>
<input type="radio"id="adiffuse" name="kumas" value="textues/kumas/1/oi2veqp_2K_Albedo.jpg">
Option 2
</label>
<label>
<input type="radio" id="bdiffuse"name="kumas" value="textues/kumas/3/sjfvce3c_2K_Albedo.jpg">
Option 3
</label>
<label>
<input type="radio" id="cdiffuse"name="kumas" value="textues/kumas/4/sjfvcjzc_2K_Albedo.jpg">
Option 4
</label>
<br><br>
<label>
<input type="radio" id="diffuse1" name="kol" value="textues\kol\1\teqbcizc_2K_Albedo.jpg" checked>
Option 1x
</label>
<label>
<input type="radio" id="adiffuse1" name="kol" value="textues\kol\2\tfjbderc_2K_Albedo.jpg">
Option 2x
</label>
<label>
<input type="radio" id="bdiffuse1"name="kol" value="textues\kol\3\tcnodi3c_2K_Albedo.jpg">
Option 3x
</label>
<label>
<input type="radio" id="cdiffuse1"name="kol" value="textues\kol\4\tcicdebc_2K_Albedo.jpg">
Option 4x
</label>
</div>
</div>
</div>
<br><br>
<label>
<input type="radio" id="diffuse2" name="dugme" value="textues\metal\1\scksebop_2K_Albedo.jpg" checked>
Option 1z
</label>
<label>
<input type="radio" id="adiffuse2" name="dugme" value="textues\metal\2\se4objgc_2K_Albedo.jpg">
Option 2z
</label>
<label>
<input type="radio" id="bdiffuse2"name="dugme" value="textues\metal\3\se4pcbbc_2K_Albedo.jpg">
Option 3z
</label>
<label>
<input type="radio" id="cdiffuse2"name="dugme" value="textues\metal\4\shkxcgfc_2K_Albedo.jpg">
Option 4z
</label>
<br><br>
<ar-button
src="https://basebros.com/models/ar_base_tekli_koltuk_3d.glb"
title="3D-AR by BASE">
<img class="arbuttonicon" src="Assets/evindebutton.png" width="170px" alt="AR-icon">
</ar-button>
<script>
const kumas = document.getElementsByName("kumas");
const kol = document.getElementsByName("kol");
const dugme = document.getElementsByName("dugme");
const arButton = document.querySelector("ar-button");
let sources = [[["https://basebros.com/models/ar_base_ayakkabi.glb"],["https://basebros.com/models/ar_base_camasir_makinesi_3d.glb"],["https://basebros.com/models/ar_base_kahve_makinesi_3d.glb"],["https://basebros.com/models/ar_base_nintendo.glb"]],[[],[],[],[]],[[],[],[],[]],[[],[],[],[]]]; /* Fill this with the sources. The first element is if the first option for kumas is selected, the second is for if the second option is selected, etc. The elements inside those elements are for each of the different options for kol, and the elements inside those elements are for each of the different options for dugme. */
function foo() {
let kumasSelected;
let kolSelected;
let dugmeSelected;
for(let i of kumas) {
if(i.checked) {
kumasSelected = kumas.indexOf(i);
}
}
for(let i of kol) {
if(i.checked) {
kolSelected = kol.indexOf(i);
}
}
for(let i of dugme) {
if(i.checked) {
dugmeSelected = dugme.indexOf(i);
}
}
arButton.src = sources[kumasSelected][kolSelected][dugmeSelected];
}
</script>

on click mulitple input then show button for validation jquery

I have here three sections, how can I make the next button show up when all three sections have been clicked? If one of them is not clicked then the button with the class "hideme" is visible, if all of them are clicked then hide "hideme" and show the "third_step" button.
<input type="date" name="purchase_date">
<input type="radio" name="group" value="one">
<input type="radio" name="group" value="two">
<input type="radio" name="group" value="three">
<input type="radio" name="choice" value="yes">
<input type="radio" name="choice" value="no">
<a class="next hideme">Next</a><a class="next third_step">Next</a>
Anybody please help, I don't know where to start on this.
Here I have add a id on <form>. And give the input some class .
use Change event | Show() | hide()
Try this
<form id="myForm">
<input type="date" name="purchase_date" class="date">
<input type="radio" name="group" value="one" classs="group">
<input type="radio" name="group" value="two" classs="group">
<input type="radio" name="group" value="three" classs="group">
<input type="radio" name="choice" value="yes" classs="choice">
<input type="radio" name="choice" value="no" classs="choice">
<a class="next" style="display:none">Next</a>
</form>
<script>
$(document).ready(function(){
$('.group').on('change',function(){
$('.date').change();
});
$('.choice').on('change',function(){
$('.date').change();
});
$('.date').on('change',function(){
var date = $('.date').val();
var group = ($('input:radio[name=group]:checked').val() || 0);
var choice = ($('input:radio[name=choice]:checked').val() || 0);
if(date != '' && group != '' && group != 0 && choice != '' && choice != 0)
$('.next').show();
else
$('.next').hide();
});
});
</script>
$(document).on("click, change","input[name=group],
input[name=choice],
input[name=purchase_date] ",
function(){
var groupSelected = $("input[name=group]:checked").val();
var choiceSelected = $("input[name=choice]:checked").val();
var dateSelected = $("input[name=purchase_date]").val();
if(groupSelected === undefined ||
choiceSelected === undefined ||
dateSelected === undefined ||
dateSelected === "")
{
$(".next").toggleClass("hideme",true);
}
else{
$(".next").toggleClass("hideme",false);
}
});

Check All checkbox should be unchecked

function toggle(source) {
checkboxes = document.getElementsByName('options[]');
for (var i = 0, n = checkboxes.length; i < n; i++) {
checkboxes[i].checked = source.checked;
}
}
<form class="unsubscribe_form" action="process.php" method="post">
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-1" value="Option1">
<label for="checkbox-1-1"></label>Option 1
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-2" value="Option2">
<label for="checkbox-1-2"></label>Option 2
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-3" value="Option2">
<label for="checkbox-1-3"></label>Option 3
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-4" value="Option3">
<label for="checkbox-1-4"></label>Option 4
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-5" value="Option3">
<label for="checkbox-1-5"></label>Option 5
<input type="checkbox" class="unsubscribe-checkbox" id="checkbox-1-6" value="All" onClick="toggle(this)" />
<label for="checkbox-1-6"></label>All
<br>
<input type="submit" name="formSubmit" value="Unsubscribe" />
</form>
When I check the All checkbox, of course, it will mark all the checkboxes, but once I uncheck one checkbox, the All checkbox is still checked. This should be unchecked. How should I do that using JS?
You will need to add onchange event handlers to every checkbox and check inside if the "All" checkbox should be checked (all checkboxes are selected) or unchecked (at least one is deselected). For example like this:
var checkboxes = [].slice.call(document.getElementsByName('options[]')),
allCheckbox = document.querySelector('input[value="All"]');
checkboxes.forEach(function(checkbox) {
checkbox.onchange = function() {
if (!this.checked) {
allCheckbox.checked = false;
}
else {
var checked = checkboxes.filter(function(check) {
return check.checked;
});
if (checked.length === checkboxes.length) {
allCheckbox.checked = true;
}
}
};
});
function toggle(source) {
for (var i = 0, n = checkboxes.length; i < n; i++) {
checkboxes[i].checked = source.checked;
}
}
<form class="unsubscribe_form" action="process.php" method="post">
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-1" value="Option1">
<label for="checkbox-1-1"></label>Option 1
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-2" value="Option2">
<label for="checkbox-1-2"></label>Option 2
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-3" value="Option2">
<label for="checkbox-1-3"></label>Option 3
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-4" value="Option3">
<label for="checkbox-1-4"></label>Option 4
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-5" value="Option3">
<label for="checkbox-1-5"></label>Option 5
<input type="checkbox" class="unsubscribe-checkbox" id="checkbox-1-6" value="All" onClick="toggle(this)" />
<label for="checkbox-1-6"></label>All
</form>
Note that I converted checkboxes collection to array with [].slice.call in order to use convenient array methods. Simple for loops can be used instead.
I'd suggest the following:
function toggle() {
// getting a reference to all the 'name="option[]" elements:
var options = document.getElementsByName('options[]'),
// a reference to the 'all' checkbox:
all = document.getElementById('checkbox-1-6');
// if the changed checkbox is the 'all':
if (this === all) {
// we iterate over all the options checkboxes (using
// Array.prototype.forEach()):
Array.prototype.forEach.call(options, function(checkbox) {
// and we set their checked property to the checked property
// state of the 'all' checkbox:
checkbox.checked = all.checked;
});
} else {
// otherwise we set the 'all' checkbox to the state of
// the Boolean returned by Array.prototype.every(),
// which returns true if all checkboxes evaluate to
// the condition within the function, otherwise false:
all.checked = Array.prototype.every.call(options, function(checkbox) {
return checkbox.checked;
});
}
}
// getting a NodeList of all the elements of 'class="unsubscribe-checkbox"':
var options = document.querySelectorAll('.unsubscribe-checkbox');
// iterating over them, again with Array.prototype.forEach()
// and assigning a change event-listener, which will execute the
// name function:
Array.prototype.forEach.call(options, function(opt) {
opt.addEventListener('change', toggle);
});
function toggle() {
var options = document.getElementsByName('options[]'),
all = document.getElementById('checkbox-1-6');
if (this === all) {
Array.prototype.forEach.call(options, function(checkbox) {
checkbox.checked = all.checked;
});
} else {
all.checked = Array.prototype.every.call(options, function(checkbox) {
return checkbox.checked;
});
}
}
var options = document.querySelectorAll('.unsubscribe-checkbox');
Array.prototype.forEach.call(options, function(opt) {
opt.addEventListener('change', toggle);
});
<form class="unsubscribe_form" action="process.php" method="post">
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-1" value="Option1">
<label for="checkbox-1-1"></label>Option 1
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-2" value="Option2">
<label for="checkbox-1-2"></label>Option 2
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-3" value="Option2">
<label for="checkbox-1-3"></label>Option 3
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-4" value="Option3">
<label for="checkbox-1-4"></label>Option 4
<input type="checkbox" class="unsubscribe-checkbox" name="options[]" id="checkbox-1-5" value="Option3">
<label for="checkbox-1-5"></label>Option 5
<input type="checkbox" class="unsubscribe-checkbox" id="checkbox-1-6" value="All" />
<label for="checkbox-1-6"></label>All
<br>
<input type="submit" name="formSubmit" value="Unsubscribe" />
</form>
You may notice that I've removed the onClick attribute from the 'all' checkbox, in preference of unobtrusive JavaScript, where the event-handlers are assigned via the JavaScript itself (which ordinarily makes for more easily-maintained code, as the arguments to be passed to a given function are assigned in the code itself, rather than having to be separately updated in the HTML).
References:
Array.prototype.every().
Array.prototype.forEach().
document.getElementsByName().
document.getElementById().
document.querySelectorAll().
EventTarget.addEventListener().
Function.prototype.call().

Javascript - get the radio button index number

**I have a php page with an array of option like this... and I need to get by javascript **the index of the selected option. Above I put the code of the javascript that is not working... Any help will be appreciated!
<input type="radio" name="option[1]" value="1">
<input type="radio" name="option[1]" value="2">
<input type="radio" name="option[1]" value="3">
<input type="radio" name="option[1]" value="4">
<input type="radio" name="option[2]" value="1">
<input type="radio" name="option[2]" value="2">
<input type="radio" name="option[2]" value="3">
<input type="radio" name="option[2]" value="4">
<input type="radio" name="option[3]" value="1">
<input type="radio" name="option[3]" value="2">
<input type="radio" name="option[3]" value="3">
<input type="radio" name="option[3]" value="4">
...
Can anyone help me?
I am trying something like this but it didn´t work
<script type="text/javascript">
function validateForm(form) {
for (var i = 0; i < form.elements.length; i++ ) {
if (form.elements[i].type == 'radio') {
if (form.elements[i].checked == true) {
if (form.elements[i].value == 1 || form.elements[i].value == 6){
var comentario=document.getElementsByName('comentario[]'[i]);
var opcao = form.elements[i];
alert(clickedElm(opcao));
submitFlag = true;
if (comentario.value.length < 100){
submitFlag=false;
alert(i);
}
return submitFlag;
}
}
}
}
}
function clickedElm(element)
{
var index = 0;
for (var i = 0; document.forms[0].elements.length; i++)
{
if (document.forms[0].elements[i] == element)
{
index = i;
}
}
return index;
}
</script>
If I correctly understood the questuion, it can be solved like this:
$(document).on('change','input[type=radio]', function(){
alert($(this).prop('name').charAt(7));
});
Here is fiddle http://jsfiddle.net/Goodluck/ynkgr/
the name attribute is used for group the radio buttons, you have to use the id attribute to access the control asking if it's checked.
Example
<html>
<head>
</head>
<body>
<form id="frmTest">
<input type="radio" name="option[1]" id="option1-item1" value="1" >
<input type="radio" name="option[1]" id="option1-item2" value="2" >
<input type="radio" name="option[1]" id="option1-item3" value="3" >
<input type="radio" name="option[1]" id="option1-item4" value="4" >
<input type="radio" name="option[2]" id="option2-item1" value="1" >
<input type="radio" name="option[2]" id="option2-item2" value="2" >
<input type="radio" name="option[2]" id="option2-item3" value="3" >
<input type="radio" name="option[2]" id="option2-item4" value="4" >
<input type="radio" name="option[3]" id="option3-item1" value="1" >
<input type="radio" name="option[3]" id="option3-item2" value="2" >
<input type="radio" name="option[3]" id="option3-item3" value="3" >
<input type="radio" name="option[3]" id="option3-item4" value="4" >
</form>
<input type="button" onclick="validateForm(document.getElementById('frmTest'))" />
<script type="text/javascript">
function validateForm(form) {
for (var i = 0; i < form.elements.length; i++ ) {
if (form.elements[i].type == 'radio') {
if (form.elements[i].checked == true) {
if (form.elements[i].value == 1 || form.elements[i].value == 6){
var comentario=document.getElementsByName('comentario[]'[i]);
var opcao = form.elements[i];
alert(clickedElm(opcao));
submitFlag = true;
if (comentario.value.length < 100){
submitFlag=false;
alert(i);
}
return submitFlag;
}
}
}
}
}
function clickedElm(element)
{
return element.id;
}
</script>
</body>
</html>
You forgot to check the condition in this line:
(the loop in function clickedElm)
for (var i = 0; document.forms[0].elements.length; i++)
So, you enter in an infinite loop.
the correct line:
for (var i = 0; i < document.forms[0].elements.length; i++)

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