How can I validate multiple radio buttons. All these radio buttons generated dynamically.
<input type="radio" name="answer_option1" value="1" id="ans_options1" />
<input type="radio" name="answer_option1" value="2" id="ans_options2" />
<input type="radio" name="answer_option1" value="3" id="ans_options3" />
<input type="radio" name="answer_option1" value="4" id="ans_options4" />
<input type="radio" name="answer_option2" value="5" id="ans_options5" />
<input type="radio" name="answer_option2" value="6" id="ans_options6" />
<input type="radio" name="answer_option2" value="7" id="ans_options7" />
<input type="radio" name="answer_option2" value="8" id="ans_options8" />
<input type="radio" name="answer_option3" value="9" id="ans_options9" />
<input type="radio" name="answer_option3" value="10" id="ans_options10" />
<input type="radio" name="answer_option3" value="11" id="ans_options11" />
<input type="radio" name="answer_option3" value="12" id="ans_options12" />
<input type="radio" name="answer_option4" value="13" id="ans_options13" />
<input type="radio" name="answer_option4" value="14" id="ans_options14" />
<input type="radio" name="answer_option4" value="15" id="ans_options15" />
<input type="radio" name="answer_option4" value="16" id="ans_options16" />
Try this http://jsfiddle.net/aamir/r9qR2/
Since each group has different name attribute so you have to do validation for each set of radio buttons.
if($('input[name="answer_option1"]:checked').length === 0) {
alert('Please select one option');
}
If you have unlimited number of groups. Try this http://jsfiddle.net/aamir/r9qR2/2/
//Make groups
var names = []
$('input:radio').each(function () {
var rname = $(this).attr('name');
if ($.inArray(rname, names) === -1) names.push(rname);
});
//do validation for each group
$.each(names, function (i, name) {
if ($('input[name="' + name + '"]:checked').length === 0) {
console.log('Please check ' + name);
}
});
If you want to show just 1 error for all groups. Try this http://jsfiddle.net/aamir/r9qR2/224/
try this new fiddle http://jsfiddle.net/Hgpa9/3/
$(document).on("click","#validate", function() {
var names = [];
$('input[type="radio"]').each(function() {
// Creates an array with the names of all the different checkbox group.
names[$(this).attr('name')] = true;
});
// Goes through all the names and make sure there's at least one checked.
for (name in names) {
var radio_buttons = $("input[name='" + name + "']");
if (radio_buttons.filter(':checked').length == 0) {
alert('none checked in ' + name);
}
else {
// If you need to use the result you can do so without
// another (costly) jQuery selector call:
var val = radio_buttons.val();
}
}
});
var names = []
$('input[name^="answer_option"]').each(function() {
var rname = $(this).attr('name');
if ($.inArray(rname, names) == -1) names.push(rname);
});
$.each(names, function (i, name) {
if ($('input[name="' + name + '"]:checked').length == 0) {
console.log('Please check ' + name);
}
});
Related
I'm not able to get the value from my checkboxes when each of them is selected alone (i.e. in isolation), except for the last one which works fine.
Could anyone help me figure this out and correct my code?
function showChoices() {
var values = [];
var cbs = document.catalog.colors;
for (var i = 0, cbLen = cbs.length; i < cbLen; i++) {
if (cbs[i].checked) {
values.push(cbs[i].value);
document.getElementById('display').innerHTML = "You selected: " + values.join(', ') + ".";
} else {
document.getElementById('display').innerHTML = "Please select an option.";
}
}
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>
Working Solution
You can write js like this and hope this helps:
function showChoices() {
var values = [];
var cbs = document.catalog.colors;
var cbLen = cbs.length;
for (var i = 0; i < cbLen; i++) {
if (cbs[i].checked) {
values.push(cbs[i].value);
}
}
if (values.length != 0) {
document.getElementById('display').innerHTML = "You selected: " + values.join(', ') + ".";
} else {
document.getElementById('display').innerHTML = "Please select an option.";
}
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>
You are overriding the div#display's innerHTML with the "Please select an option..." text whenever the last iteration of your loop jumps into the else block (meaning the last box isn't checked).
I would check if at least one element is selected, and if not return early from your function. After that, you can simply display the values by joining them together.
function showChoices() {
var values = [];
var cbs = Array.from(document.catalog.colors);
let el = document.getElementById('display');
let checked = cbs.filter(e => e.checked);
if (!checked.length) {
el.innerHTML = 'Please select at least one';
return false;
}
el.innerHTML = `You selected ${checked.map(e => e.value).join(', ')}`;
return false;
}
<form method="post" name="catalog">
<input type="checkbox" name="colors" value="red" /><span>red</span> <br />
<input type="checkbox" name="colors" value="orange" /><span>orange</span> <br />
<input type="checkbox" name="colors" value="green" /><span>green</span> <br />
<input type="checkbox" name="colors" value="blue" /><span>blue</span> <br />
<input type="button" onclick="showChoices();" value="Submit">
</form>
<br />
<span id='display'></span>
I am displaying some check boxes. The user can check a maximum of 4 boxes. I store the checked value in 4 textboxes.
My problem: How can I correctly store the "new" checked value when the user randomly unchecks one box and checks another?
I store values as follows: First checked into item_1, second checked into item_2, third checked into item_3 ... If the user unchecks the first checked box, for example, how can I store the value of the next box he or she checks into item_1? Please help.
Simplified code
<input type="checkbox" name="prodname_1" id="prodname_1"value="1"/>
<input type="checkbox" name="prodname_2" id="prodname_2"value="2"/>
<input type="checkbox" name="prodname_3" id="prodname_3"value="3"/>
.
.
<input type="checkbox" name="prodname_10" id="prodname_10"value="10"/>
<input type="text" name="item_0" id="item_0"value=""/>
<input type="text" name="item_1" id="item_1"value=""/>
<input type="text" name="item_2" id="item_2"value=""/>
<input type="text" name="item_3" id="item_3"value=""/>
$(document).ready(function (e)
{
counter=0;
$('input[id^="prodname_"]').change(function()
{
id = $(this).attr('id');
var arr = id.split('_');
valueChecked=$('#'+id).val();
if(this.checked)
{
if(counter==4)
{
alert('Allready checked 4 items');
this.checked=false;
return false;
}
$("#item_"+counter).val(valueChecked);
++counter;
}
});
});
Instead of retaining a counter, just count the number of checked boxes when the change occurs.
Revised to use the logic you intended (took a little while to figure that out) :)
JSFiddle: http://jsfiddle.net/TrueBlueAussie/tmLnbvv0/9/
$(document).ready(function (e) {
var $items = $('input[id^="item_"]');
var checkboxes = $('input[id ^= "prodname_"]').change(function () {
var id = $(this).attr('id');
var arr = id.split('_');
valueChecked = $(this).val();
// Count of checked checkboxes
var counter = checkboxes.filter(':checked').length;
if ($(this).is(':checked')) {
// count the checked checkboxes
if (counter > 4) {
alert('Already checked 4 items');
$(this).prop('checked', false);
} else {
// Add to the first available slot
$items.filter(function(){return $(this).val() == ""}).first().val(valueChecked);
}
} else {
// Remove the matching value
$items.filter(function(){return $(this).val() == valueChecked;}).first().val('');
}
});
});
note: The "jQuery way" for changing checkboxes is to use prop('checked', booleanvalue) (also changed above)
V2 - If you don't want gaps:
This version is actually simpler as it just clears the items and fills them, in order, with any checked checkbox values.
JSFiddle: http://jsfiddle.net/TrueBlueAussie/tmLnbvv0/13/
$(document).ready(function (e) {
var $items = $('input[id^="item_"]');
var $checkboxes = $('input[id ^= "prodname_"]').change(function () {
// Count of checked checkboxes
var counter = $checkboxes.filter(':checked').length;
// count the checked checkboxes
if (counter > 4) {
alert('Already checked 4 items');
$(this).prop('checked', false);
}
// Clear all the items
$items.val('');
// Fill the items with the selected values
var item = 0;
$checkboxes.filter(':checked').each(function () {
$('#item_' + (item++)).val($(this).val());
});
});
});
Look at
$(document).ready(function(e) {
var counter = 0,
$items = $('input[name^="item_"]');
$('input[id^="prodname_"]').change(function() {
var id = this;
if (this.checked) {
if (counter == 4) {
this.checked = false;
return;
}
$("#item_" + counter).val(this.value).attr('data-value', this.value);
++counter;
} else {
var $item = $items.filter('[data-value="' + this.value + '"]');
var index = $items.index($item);
$items.slice(index, counter).each(function(i) {
var $n = $items.eq(index + i + 1);
$(this).val($n.val() || '').attr('data-value', $n.attr('data-value'));
});
counter--;
$("#item_" + counter).val('').removeAttr('data-value');
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="checkbox" name="prodname_1" id="prodname_1" value="1" />
<input type="checkbox" name="prodname_2" id="prodname_2" value="2" />
<input type="checkbox" name="prodname_3" id="prodname_3" value="3" />
<input type="checkbox" name="prodname_4" id="prodname_4" value="4" />
<input type="checkbox" name="prodname_5" id="prodname_5" value="5" />
<input type="checkbox" name="prodname_6" id="prodname_6" value="6" />
<input type="checkbox" name="prodname_7" id="prodname_7" value="7" />
<input type="checkbox" name="prodname_8" id="prodname_8" value="8" />
<input type="checkbox" name="prodname_9" id="prodname_9" value="9" />
<input type="checkbox" name="prodname_10" id="prodname_10" value="10" />
<input type="text" name="item_0" id="item_0" value="" />
<input type="text" name="item_1" id="item_1" value="" />
<input type="text" name="item_2" id="item_2" value="" />
<input type="text" name="item_3" id="item_3" value="" />
Please help, I failed to code the checkbox that can only checked 1 item. Any help would be appreciated. Thanks
Html
<input type="checkbox" name="<%=Name %>" onClick="return checkbox(this)" >
Javascript
function checkbox(a) {
var Count = 0;
if (a.checked)
{
Count = Count + 1;
}
if (Count == 2)
{
alert('choose One Please');
return false;
}
}
You are declaring count inside a method hence it will always be initialised to 0 when you click on check box. Hence declare count globally and maintain the count.
var NewCount = 0;// global declaration
function KeepCount(a){
if (a.checked){
NewCount = NewCount + 1;
}else{
NewCount = NewCount - 1;
}
if(NewCount>1){
alert('Pick Just One Please');
return false;
}
}
UPDATE:
Another approach if you don't want to add variable globally:
HTML
Group 1
<input type="checkbox" value="1" name="test[1][]" onclick="addClassCheck(this)"/>
<input type="checkbox" value="1" name="test[1][]" onclick="addClassCheck(this)"/>
<input type="checkbox" value="1" name="test[1][]" onclick="addClassCheck(this)"/>
<br/>
Group 2
<input type="checkbox" value="1" name="test[2][]" onclick="addClassCheck(this)"/>
<input type="checkbox" value="1" name="test[2][]" onclick="addClassCheck(this)"/>
<input type="checkbox" value="1" name="test[2][]" onclick="addClassCheck(this)"/>
JavaScript
function addClassCheck(element){
if(element.checked){
element.classList.add("marked");
}else{
element.classList.remove("marked");
}
if(document.getElementsByClassName("marked").length>1){
alert("Please select only one check box");
element.checked=false;
element.classList.remove("marked");
}
}
Fiddle demo
Group your checkboxs as
<input type="checkbox" class="radio" value="1" name="test[1][]" />
<input type="checkbox" class="radio" value="1" name="test[1][]" />
<input type="checkbox" class="radio" value="1" name="test[1][]" />
<br/>
Group 2
<input type="checkbox" class="radio" value="1" name="test[2][]" />
<input type="checkbox" class="radio" value="1" name="test[2][]" />
<input type="checkbox" class="radio" value="1" name="test[2][]" />
Query
$("input:checkbox").click(function() {
if ($(this).is(":checked")) {
var group = "input:checkbox[name='" + $(this).attr("name") + "']";
$(group).prop("checked", false);
$(this).prop("checked", true);
} else {
$(this).prop("checked", false);
}
});
DEMO
Scenario:
Three unchecked check-boxes, each with different id and value.
An empty paragraph (or label) with id = par.
[CB1] has value 1.
[CB2] has value 2.
[CB3] has value 3.
Now, when I click cb1 -> 'par' gets and prints the value of cb1.
Clicking on cb3, 'par' gets the value of cb1+cb3.
Clicking cb1, 'par' subtracts the value of cb1 and so on.. I think you get the point.
How can I achieve this with only HTML and JavaScript (without jQuery).
<input type="checkbox" id="1" value="1" />
<input type="checkbox" id="2" value="2" />
<input type="checkbox" id="3" value="3" />
<p id="par"></p>
This will do it: jsfiddle example (updated to remove alert)
HTML:
<input type="checkbox" id="1" value="1" onclick='checkClicked(event)'/>
<input type="checkbox" id="2" value="2" onclick='checkClicked(event)'/>
<input type="checkbox" id="3" value="3" onclick='checkClicked(event)'/>
<p id="par"></p>
JavaScript:
function checkClicked(element)
{
var targetElement = element.target;
var newVal = targetElement.value;
if( !targetElement.checked )
{
newVal *= -1;
}
var currentVal = document.getElementById('par').innerHTML;
if( currentVal )
{
newVal = parseInt(currentVal) + parseInt(newVal);
}
document.getElementById('par').innerHTML = newVal;
}
<label>
<input type="checkbox" id="check1" value="check1" onchange="alterP(this);"/>check1
</label>
<label>
<input type="checkbox" id="check2" value="check2" onchange="alterP(this);"/>check2
</label>
<label>
<input type="checkbox" id="check3" value="check3" onchange="alterP(this);"/>check3
</label>
<p id="par"></p>
js Code
function alterP(obj) {
var par = document.getElementById('par');
var txt = (obj.checked) ? obj.value : "";
par.innerHTML = txt;
}
<script>
document.getElementById("1").addEventListener("click", processCheck);
document.getElementById("2").addEventListener("click", processCheck);
document.getElementById("3").addEventListener("click", processCheck);
function processCheck() {
var theParagraph = document.getElementById("par");
var currentValue = 0;
if (!isNaN(parseInt(theParagraph.textContent))) {
currentValue = parseInt(theParagraph.textContent)
}
if (this.checked) {
theParagraph.textContent = currentValue + parseInt(this.value);
}
else {
theParagraph.textContent = currentValue - parseInt(this.value);
}
}
</script>
I have two radio groups. I wish to put a condition where if pRange is checked (val=pRange) and periodType value is 'one', 'two' or 'three', it displays a div called message. but my js code below doesn't seem to work. Any help is much appreciated.
$("input[name$='periodType']").change(function() {
var grpname = $(this).val();
var pname = $("input:radio[name='mainPeriod']:checked").val();
if (((grpname == "one") || (grpname == "two") || (grpname == "three")) && (pname=="pRange")) {
alert( pname + ' gname= ' + 'yes'); $('.message').show;
}
else {
alert( pname + ' gname= ' + 'no');
}
});
GROUP 1
<input type="radio" name="mainPeriod" id="pRange" val="pRange" />
<input type="radio" name="mainPeriod" id="pHour" val="pHour" />
<input type="radio" name="mainPeriod" id="pDay" val="pDay" />
<input type="radio" name="mainPeriod" id="pWeek" val="pWeek" />
<input type="radio" name="mainPeriod" id="pMonth" val="pMonth" />
GROUP 2
<input type="radio" name="periodType" val="one" />
<input type="radio" name="periodType" val="two" />
<input type="radio" name="periodType" val="three" />
<input type="radio" name="periodType" val="four" />
<input type="radio" name="periodType" val="five" />
<div class="message" style="display:none;">Message</div>
Whipped up a quick fiddle jsfiddle
your radio values are written as val="" not value="" don't know if that was just for the test or in your actual code.
I checked the console of your values
var grpname = $(this).val();
var pname = $("input:radio[name='mainPeriod']:checked").val();
The both return on/off only which is causing the issue. What you need to get is the .attr('val') so you can check the values
var grpname = $(this).attr('val');
var pname = $("input:radio[name='mainPeriod']:checked").attr('val');
Here's a fiddle http://jsfiddle.net/B9GyV/