We Keep Coding

How do I uncheck a radio button within an array with javascript

How do I un check a radio button within the input box. I've been trying to uncheck this radio button with javascript but I can't seem to be able to do it when its inside an array
this is the code that I want to un check with javascript
<?php
for($i = 0; $i < 3; $i ++){
$num = rand(0,2);
for($j = 0; $j < 3; $j++){
if($num){
$check = 'checked';
}else
$check='';
echo '<input name="acc['.$i.']" type="radio" '.$check.'>';
}
echo '<br/>';
}
?>
I've tried with this javascript but I don't know how to point to the actual radio button to uncheck
$(':radio').mousedown(function(e){
var $self = $(this);
if( $self.is(':checked') ){
var uncheck = function(){
setTimeout(function(){
$self.removeAttr('checked');
},0);
};
var unbind = function(){
$self.unbind('mouseup',up);
};
var up = function(){
uncheck();
unbind();
};
$self.bind('mouseup',up);
$self.one('mouseout', unbind);
}
});

So you have some rows, each row has 3 radios.
One radio can be togglable
If a user selects a radio in one row, all radios from other rows should become "unchecked":
var $radios = $(":radio");
$radios.on("mouseup", function(e) {
var name = $(this).prop("name");
// Make togglable
if(this.checked){
setTimeout($.proxy(function() {
this.checked = false;
}, this),0);
}
// Unselect radios of other rows
$radios.not( $("[name='"+ name +"']") ).prop("checked", false);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<br>A
<input type="radio" name="acc[0]">
<input type="radio" name="acc[0]">
<input type="radio" name="acc[0]">
<br>B
<input type="radio" name="acc[1]">
<input type="radio" name="acc[1]">
<input type="radio" name="acc[1]">
<br>C
<input type="radio" name="acc[2]">
<input type="radio" name="acc[2]">
<input type="radio" name="acc[2]">
(Note that your PHP currently makes checked all three radios inside a row! use Inspect Element to see that issue. You should fix this; but I have no clue why you use random 0,1,2... anyways so I'm unable to help you here)

How to disable a text-box when clicking on other radio-buttons using a single function in javaScript?

I want to disable the text-box (its id is text1), when clicking on other radio buttons using a single function. According to my code the text-box is showing when the user is clicking on the radio button (its id is rd_other). But when the user clicking on the other radio buttons, after clicking the above radio button (its id is rd_other) the text-box is not disabling.
Here is HTML my code.
<input type="radio" name="rd_other" id="rd_other" value="rd_other" data-toggle="radio" onchange="enableText()">Other (please specify)
<input type="text" name="text1" id="text1"class="form-control input-sm jfl" readonly="readonly" style="display: none;"/>
<input type="radio" name="rdn1" id="rdn1" value="rdn1" data-toggle="radio">I haven't received the disc
<input type="radio" name="rdn2" id="rdn2" value="rdn2" data-toggle="radio">I lost or damaged the protective cover
Here is my javaScript code.
function enableText() {
var text1 = document.getElementById('text1');
text1.readOnly = false;
text1.style.display = 'block';
}

Firstly, to make sure there are no confusions, onchange will only fire when a radio button is selected.
Secondly, you would have to hook up an onchange function to the two other radio buttons. The function below should work.
function disableText() {
var text1 = document.getElementById('text1');
text1.readOnly = true;
text1.style.display = 'none';
}

like this
function disable() {
//one radio button
var radio = document.getElementById("your_radio_button_id");
var checkbox = document.getElementById("your_checkbox_id");
if (radio.checked == true) {
checkbox.disabled = true;
}
}
or like this
function disable() {
var radios = document.getElementsByName("your_radio_button_group_name");
var checkbox = document.getElementById("your_checkbox_id");
for (var i = 0; i < radios.length; i++) {
if (radios[i].checked == true) {
checkbox.disabled = true;
}
}
}

You can fix this like this:
window.enableText = function(e) {
var text1 = document.getElementById('text1');
if(e.id == "rd_other2") {
text1.readOnly = false;
text1.style.display = 'block';
}
else{
text1.readOnly = true;
text1.style.display = 'none';
}
}
please check the full example here :)

unselecting radio input selection

In a part of my application where i check for duplicate radio input selection and revert if its already selected to early selection.
Here is my html code ..
<input type="radio" name="A" checked="checked" onclick="return check();" />
<input type="radio" name="A" onclick="return check();" />
<br />
<input type="radio" name="B" onclick="return check();" />
<input type="radio" name="B" checked="checked" onclick="return check();" />
Here is the javascript code
function check() {
//logic to check for duplicate selection
alert('Its already selected');
return false;
}
And here is the demo
The above code works fine. The issue is when the input isn't initially checked. In such condition the radio input selection doesn't revert to unchecked.
NOTE: when in checked state, returning false shows and alert and sets the check box to initial checked state. But when initially in non checked state this doesn't work.

In DOM ready, check if any radio button is checked or not. If any radio button is checked, increase the counter by one. In onclick of the radio button, check if the counter value is 1. if yes, return false, else increase counter by 1.
try this code,
html
<input type="radio" name="A" checked="checked" />
<input type="radio" name="A" />
<br />
<input type="radio" name="B" />
<input type="radio" name="B" />
JS
var counterA = 0;
var counterB = 0;
$(document).ready(function () {
if ($("input:radio[name=A]").is(":checked") == true) counterA++;
if ($("input:radio[name='B']").is(":checked") == true) counterB++;
});
$('input:radio[name=A]').click(function () {
if (counterA == 1) {
alert('already checked');
return false;
} else {
counterA++;
}
});
$('input:radio[name=B]').click(function () {
if (counterB == 1) {
alert('already checked');
return false;
} else {
counterB++;
}
});
SEE THIS DEMO

iJay wants to ask several questions and privides the same answers for each question. Each answer can only be choosen once. If a user clicks the same answer the second time a error-message should be shown.
// get all elements
var elements = document.querySelectorAll('input[type="radio"]');
/**
* check if radio with own name is already selected
* if so return false
*/
function check(){
var selected_name = this.name,
selected_value = this.value,
is_valid = true;
// compare with all other elements
for(var j = 0; j < len; j++) {
var el = elements[j];
// does the elemenet have the same name AND is already selected?
if(el.name != selected_name && el.value == selected_value && el.checked){
// if so, selection is not valid anymore
alert('Oups..! You can not select this answer a second time :( Choose another one!')
// check current group for previous selection
is_valid = false;
break;
}
};
return is_valid;
}
/**
* bind your elements to the check-routine
*/
for(var i = 0, len = elements.length; i < len; i++) {
elements[i].onmousedown = check;
}
Here is a DEMO

Use $yourRadio.prop('checked', false); to uncheck the specific radio.

Use like this:
function check() {
//logic to check for duplicate selection
var checked = true ? false : true;
$(this).prop('checked', checked);
return false;
}

1) add class attribute to same type of checkbox elements(which are having same name)
ex: class = "partyA"
2)
var sourceIdsArr = new Array();
function check() {
$('.partyA').each(function() {
var sourceId = $(this).val();
if(sourceIdsArr.indexOf(sourceId) != -1){
sourceIdsArr.push(sourceId );
}
else{
alert('Its already selected');
return false;
}
});
}

Here is your code..
function check() {
//logic to check for duplicate selection
var selectflag=0;
var radiovalue=document.getElementsByName("B");
for(var i=0;i<radiovalue.length;i++)
{
// alert(radiovalue[i].checked);
if(radiovalue[i].checked==true)
{
selectflag=1;
break;
}
}
if(selectflag==1)
{
alert('Its already selected');
return false;
}
return true;
}
Trigger your event on MouseDown. It will work fine.

I think this is something you are looking for :
<html>
<head>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
</head>
<body>
<input type="radio" name="A" checked="checked" onclick="return check(this);"/>
<input type="radio" name="A" onclick="return check(this);"/>
<script>
$( document ).ready(function() {
this.currentradio = $("input[name='A']:checked")[0];
});
function check(t) {
var newradio= $("input[name='A']:checked")[0];
if (newradio===document.currentradio){
alert('already selected');
return false
}else{
document.currentradio = $("input[name='A']:checked")[0];
}
}
</script>
</body>
<html>

Check and uncheck boxes in JavaScript

I have a script that checks and check all boxes in a form, my problem is that I only want it to affect only my checkboxes but it also affecting my radio buttons.
This is my JavaScript:
<script>
checked=false;
function checkedAll (frm1) {
var aa= document.getElementById('frm1');
if (checked == false)
{
checked = true
}
else
{
checked = false
}
for (var i =0; i < aa.elements.length; i++)
{
aa.elements[i].checked = checked;
}
}
</script>
This is my html:
<form id ="frm1">
<input type="checkbox" name="chk1">
<input type="radio" name="chk1">
<input type="checkbox" name="chk2">
<input type='checkbox' name='checkall' onclick='checkedAll(frm1);'>
</form>
I was wondering whether there was a way to check only the checkboxes not the radio button?

for (var i =0; i < aa.elements.length; i++)
{
if (aa.elements[i].type == "checkbox") {
aa.elements[i].checked = checked;
}
}

You can loop through the form elements and check for the "type" property. Alternately, you can use a javascript library like jQuery, which makes it easier to select elements of certain type.
var elLength = document.MyForm.elements.length;
for (i=0; i<elLength; i++)
{
var type = MyForm.elements[i].type;
if (type=="checkbox" && MyForm.elements[i].checked){
alert("Form element in position " + i + " is of type checkbox and is checked.");
}
else if (type=="checkbox") {
alert("Form element in position " + i + " is of type checkbox and is not checked.");
}
else {
}
}
In jQuery it would be:
$("input[type='checkbox']).each(function(chk) {
chk.checked = !chk.checked;
});

You can use jquery. use the html code below in your editor. it works correctly!
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.0.js"> </script>
</head>
<form id="myform">
<input type="checkbox" />chk1
<input type="checkbox" />chk2<br/>
<input type="radio" />radio1<br/>
<a style="cursor:pointer" onclick="ch()">check/uncheck</a>
</form>
</body></html>
and this script:
<script>
function ch(){
$("form#myform input[type='checkbox']").each(function(chk) {
this.checked = !this.checked;
});
}
</script>

Javascript checkbox onChange

I have a checkbox in a form and I'd like it to work according to following scenario:
if someone checks it, the value of a textfield (totalCost) should be set to 10.
then, if I go back and uncheck it, a function calculate() sets the value of totalCost according to other parameters in the form.
So basically, I need the part where, when I check the checkbox I do one thing and when I uncheck it, I do another.

Pure javascript:
const checkbox = document.getElementById('myCheckbox')
checkbox.addEventListener('change', (event) => {
if (event.currentTarget.checked) {
alert('checked');
} else {
alert('not checked');
}
})
My Checkbox: <input id="myCheckbox" type="checkbox" />

function calc()
{
if (document.getElementById('xxx').checked)
{
document.getElementById('totalCost').value = 10;
} else {
calculate();
}
}
HTML
<input type="checkbox" id="xxx" name="xxx" onclick="calc();"/>

If you are using jQuery.. then I can suggest the following:
NOTE: I made some assumption here
$('#my_checkbox').click(function(){
if($(this).is(':checked')){
$('input[name="totalCost"]').val(10);
} else {
calculate();
}
});

Use an onclick event, because every click on a checkbox actually changes it.

The following solution makes use of jquery. Let's assume you have a checkbox with id of checkboxId.
const checkbox = $("#checkboxId");
checkbox.change(function(event) {
var checkbox = event.target;
if (checkbox.checked) {
//Checkbox has been checked
} else {
//Checkbox has been unchecked
}
});

HTML:
<input type="checkbox" onchange="handleChange(event)">
JS:
function handleChange(e) {
const {checked} = e.target;
}

Reference the checkbox by it's id and not with the #
Assign the function to the onclick attribute rather than using the change attribute
var checkbox = $("save_" + fieldName);
checkbox.onclick = function(event) {
var checkbox = event.target;
if (checkbox.checked) {
//Checkbox has been checked
} else {
//Checkbox has been unchecked
}
};

Javascript
// on toggle method
// to check status of checkbox
function onToggle() {
// check if checkbox is checked
if (document.querySelector('#my-checkbox').checked) {
// if checked
console.log('checked');
} else {
// if unchecked
console.log('unchecked');
}
}
HTML
<input id="my-checkbox" type="checkbox" onclick="onToggle()">

try
totalCost.value = checkbox.checked ? 10 : calculate();
function change(checkbox) {
totalCost.value = checkbox.checked ? 10 : calculate();
}
function calculate() {
return other.value*2;
}
input { display: block}
Checkbox: <input type="checkbox" onclick="change(this)"/>
Total cost: <input id="totalCost" type="number" value=5 />
Other: <input id="other" type="number" value=7 />

I know this seems like noob answer but I'm putting it here so that it can help others in the future.
Suppose you are building a table with a foreach loop. And at the same time adding checkboxes at the end.
<!-- Begin Loop-->
<tr>
<td><?=$criteria?></td>
<td><?=$indicator?></td>
<td><?=$target?></td>
<td>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="active" value="<?=$id?>" <?=$status?'checked':''?>>
<!-- mark as 'checked' if checkbox was selected on a previous save -->
</div>
</td>
</tr>
<!-- End of Loop -->
You place a button below the table with a hidden input:
<form method="post" action="/goalobj-review" id="goalobj">
<!-- we retrieve saved checkboxes & concatenate them into a string separated by commas.i.e. $saved_data = "1,2,3"; -->
<input type="hidden" name="result" id="selected" value="<?= $saved_data ?>>
<button type="submit" class="btn btn-info" form="goalobj">Submit Changes</button>
</form>
You can write your script like so:
<script type="text/javascript">
var checkboxes = document.getElementsByClassName('form-check-input');
var i;
var tid = setInterval(function () {
if (document.readyState !== "complete") {
return;
}
clearInterval(tid);
for(i=0;i<checkboxes.length;i++){
checkboxes[i].addEventListener('click',checkBoxValue);
}
},100);
function checkBoxValue(event) {
var selected = document.querySelector("input[id=selected]");
var result = 0;
if(this.checked) {
if(selected.value.length > 0) {
result = selected.value + "," + this.value;
document.querySelector("input[id=selected]").value = result;
} else {
result = this.value;
document.querySelector("input[id=selected]").value = result;
}
}
if(! this.checked) {
// trigger if unchecked. if checkbox is marked as 'checked' from a previous saved is deselected, this will also remove its corresponding value from our hidden input.
var compact = selected.value.split(","); // split string into array
var index = compact.indexOf(this.value); // return index of our selected checkbox
compact.splice(index,1); // removes 1 item at specified index
var newValue = compact.join(",") // returns a new string
document.querySelector("input[id=selected]").value = newValue;
}
}
</script>
The ids of your checkboxes will be submitted as a string "1,2" within the result variable. You can then break it up at the controller level however you want.