How to retrieve true/false from a checkbox input? - javascript

I have a table, and each row of the table has two checkboxes. I am going through each row of the table and trying to send a boolean back to the controller (true if checked, false if not), but the value being passed back is always false. For reference, this is how I have been setting up the table:
#foreach (var item in Model.lockers)
{
<tr>
<td>
#Html.CheckBoxFor(modelItem => item.IsActive, new { htmlAttributes = new { #class = "form-control IsEnabled" } })
</td>
<td>
#Html.CheckBoxFor(modelItem => item.IsADA, new { htmlAttributes = new { #class = "form-control IsADA" } })
</td>
</tr>
}
And this is my code to retrieve the information from this checkbox:
var list = [];
$('#tblMaster tbody tr').each(function (index, ele) {
var LockerDoorMaster = {
IsActive: $('.IsEnabled', this).is(":checked"),
IsADA: $('.IsADA', this).is(":checked")
}
list.push(LockerDoorMaster);
});
How can I modify my code so that the value 'true' will be passed back if the checkbox is checked? Thank you!

<html>
<body>
<form name="y">
<input type="checkbox" name="inputOne">
<input type="checkbox" name="inputTwo">
</form>
<p id="demo"></p>
<script>
if(document.forms["form"]["inputOne"].selected == "true"){ document.getElementById("demo").innerHTML = "You Selected The First Button";}
if(document.forms["form"]["inputTwo"].selected == "true"){ document.getElementById("demo").innerHTML = "You Selected The Second Button";}
</script>
</body>
</html>

sometimes plain vanilla js is the best way to go.
var cb = document.getElementById('cb').checked;
console.log(cb);
var cb2 = document.getElementById('cb2').checked;
console.log(cb2);
<input id='cb' type='checkbox'>
<input id='cb2' type='checkbox' checked>

If i understood you correctly, you need to add an event that will trigger on checkbox change, because otherwise you will always have the checkbox initial value when you submit the data in your list.
var list = [];
function setList() {
list = [];
$('#tblMaster tbody tr').each(function (index, ele) {
var LockerDoorMaster = {
IsActive: $('.IsEnabled', this).prop('checked'),
IsADA: $('.IsADA', this).prop('checked')
};
list.push(LockerDoorMaster);
});
}
setList();
$('.IsEnabled').on('change', function () {
setList();
});
$('.IsADA').on('change', function () {
setList();
});
Basically this code updates your list every time the checkbox value changes. Although this is not the best approach, but it answers your question

Related

Display value of multiple selected checkboxes [duplicate]

This question already has answers here:
Getting multiple values from checked checkboxes Javascript
(3 answers)
Closed 3 months ago.
I am trying to display multiple checkbox values in a separate DIV to show the results of the checkboxes to the user. But I also want to remove the value if the user de-selects the checkbox. This is the code I have so far but can only display/hide one value at a time. For example, if I click checkboxes a, b, and c, it will show all values. But If I uncheck, they will hide. Thanks
<input onchange="selectArr(this)" type="checkbox" name="accessory" value="a"/>
<input onchange="selectArr(this)" type="checkbox" name="accessory" value="b"/>
<input onchange="selectArr(this)" type="checkbox" name="accessory" value="c"/>
<div id="acc"></div>
function selectAcc(cb) {
var x = cb.checked ? cb.value : '';
document.getElementById("acc").innerHTML = x;
}
// selecting input type checkboxes
const inputCheckBoxes = document.querySelectorAll("input[type=checkbox]");
const main = document.querySelector("#main");
// function to print in main div
const printCheckedValue = (array) => {
main.innerText = "";
array.forEach(value => {
main.innerText += value;
})
}
// to store checkboxed values
let checkedValue = [];
// looping through all inputcheckboxes and attching onchange event
Object.values(inputCheckBoxes).forEach((inputCheckBoxe, index) => {
inputCheckBoxe.onchange = (e) => {
// checking if value is checkedbox or not
if (checkedValue.includes(e.target.value)) {
// if checkeboxed than filtering array
checkedValue = checkedValue.filter(val => val != e.target.value)
printCheckedValue(checkedValue);
} else {
checkedValue.push(e.target.value);
printCheckedValue(checkedValue);
}
}
})
<input type="checkbox" name="accessory" value="a" />
<input type="checkbox" name="accessory" value="b" />
<input type="checkbox" name="accessory" value="c" />
<div id="main"></div>
Hope this works for you .
function selectAcc(cb) {
// get previous div value
var previousValue = document.getElementById("acc").getAttribute('value');
var newValue = previousValue;
//store the new clicked value
var value = cb.value;
// if the new value is checked and the value is not present in the div add it to the div string value
if (cb.checked && !previousValue.includes(value)) newValue+=value ;
// else remove the value from div string value
else previousValue = newValue.replace(value, '');
// update new value in div
document.getElementById("acc").innerHTML = newValue;
}
Try put like something this
var checked = []
function selectAcc(cb) {
if(cb.checked){
checked.push(cb.value)
} else {
var index = checked.indexOf(cb.value)
checked.splice(index, 1)
}
document.getElementById("acc").innerHTML = checked.join(' ');
}

how to store dynamically created checked checkbox in array?

I am having dynamically created checkbox...
I want that checked value from the checkbox should be stored in one array...
I am Facing the following Problems...
*
var checkedvalue=document.querySelectorAll('input[type=checkbox]:checked');
If I alert the value of checkedvalue It given undefined
If I have console.log the final variable console.log(array); It given the
["on"] in the console.log if the value is checked.
I didn't get the actual value.My code is given below. I don't know what is the mistake I did. Anyone could you please help me.
Thanks in Advance
<input type="Submit" Value="add" onclick="searchinput()">
--------------
function searchinput()
{
var li=document.createElement("li");
//creating checkbox
var label=document.createElement('label');
label.className="lab_style";
li.appendChild(label);
var check=document.createElement('input');
check.type="checkbox";
check.name="check_bo";
li.appendChild(check);
check.addEventListener('click', function() {
var array=[];
var checkedvalue=document.querySelectorAll('input[type=checkbox]:checked');
alert(checkedvalue.value);
for (var i = 0; i < checkedvalue.length; i++) {
array.push(checkedvalue[i].value);
console.log(array);
}
}, false);
}
one of the problems you are facing is that
document.querySelectorAll('input[type=checkbox]:checked');
returns a NodeList and value is not a property on an NodeList object. That is why you are seeing "undefined" in your alert.
Changing as little of your code as possible, I think this should work:
function searchinput()
{
var li=document.createElement("li");
//creating checkbox
var label=document.createElement('label');
label.className="lab_style";
li.appendChild(label);
var check=document.createElement('input');
check.type="checkbox";
check.name="check_bo";
li.appendChild(check);
check.addEventListener('click', function() {
var array=[];
var checkedvalue = document.querySelectorAll('input[type=checkbox]:checked');
for (var i = 0; i < checkedvalue.length; i++) {
if(checkedvalue[i].checked) {
array.push(checkedvalue[i].value);
}
}
}, false);
}
If you have a form with a bunch of checkboxes and once the form is submitted you want to have the values of all the checkboxes which are checked stored in an array then you can do it like this.
const checkboxes = document.querySelectorAll("input[type=checkbox]");
const form = document.querySelector("form");
const arr = [];
form.addEventListener("submit", (e) => {
e.preventDefault()
checkboxes.forEach(chbox => {
if (chbox.checked) {
arr.push(chbox.value)
}
})
console.log(arr)
})
<form>
<label>Apple:
<input type="checkbox" value="apple" name="test"></label>
<label>Mango:
<input type="checkbox" value="mango" name="test"></label>
<label>Banana:
<input type="checkbox" value="banana" name="test"></label>
<label>Grape:
<input type="checkbox" value="grape" name="test"></label>
<button type="submit">Submit</button>
</form>

Unchecking of the checked checkboxes on another button click

I want the checked checkboxes to be unchecked when clicking another button:
Below is the HTML
<input type="checkbox" name="checkb" id="Agent" value="Agent"> type=Agent
<br />
<input type="checkbox" name="checkb" id="Customer" value="Customer"> type=Customer
<br />
<input type="checkbox" name="checkb" id="Phone" value="Phone"> type=Phone
<br />
<input type="checkbox" name="checkb" id="ID_Card" value="ID_Card"> type=ID_Card
<br />
<input type=datetime id="Start_Date" value="" placeholder="Start_Date" />
<input type=datetime id="End_Date" value="" placeholder="End_Date" />
<button id="date">
Interval
</button>
On clicking of the Interval button if any checkboxes are checked they should get unchecked.
Below is the event listener for the Interval button:
var check1 = document.getElementById("Agent");
var check2 = document.getElementById("Customer");
var check3 = document.getElementById("Phone");
var check4 = document.getElementById("ID_Card");
var newBtn = document.getElementById("date");
if (newBtn) {
newBtn.addEventListener("click", function() {
if (check1.checked) {
var ischecked1 = check1.checked;
check1.checked != ischecked1;
}
if (check2.checked) {
var ischecked2 = check2.checked;
check2.checked != ischecked2;
}
if (check3.checked) {
var ischecked3 = check3.checked;
check3.checked != ischecked3;
}
if (check4.checked) {
var ischecked4 = check4.checked;
check4.checked != ischecked4;
}
});
}
Below code runs without any errors, but the boxes do not get unchecked if they are checked.
Below is the fiddle
Your statements are just evaluating as booleans, not performing assignments:
check1.checked != ischecked1; // this returns a boolean, doesn't do any assignment
You want to do this to toggle the checked state:
check1.checked = !ischecked1;
Same thing for other checkboxes.
There's also no need to create the extra variables, you can just do the toggling and reading directly:
check1.checked = !check1.checked;
Since you're only toggling checkboxes when they are checked, you can just directly set them to false as well.
if (check1.checked) check1.checked = false;
Instead of having if statements, you can use array iteration to do the toggling:
[check1, check2, check3, check4].forEach(check => {
if (check.checked) {
check.checked = false;
}
});
// or query the checkboxes directly and do the same
[...document.querySelectorAll('input[type="checkbox"]')].forEach(check => {
if (check.checked) {
check.checked = false;
}
});
Your mistake is in this line:
check1.checked != ischecked1;
This actually means "compare if check1.checked is not equal to ischecked1".
Most simple solution would be to remove the if statement and just do this:
check1.checked = !check1.checked
This means "set check1.checked to the opposite of check1.checked".
Since all checkboxes have the same name you could also collect all checkboxes by requesting them by name and use a loop to walk through them. A small example:
// Collect all checkboxes with a CSS selector that matches all input
// elements with a name attribute that's equal to "checkb"
var checkboxes = document.querySelectorAll('input[name="checkb"]');
var newBtn = document.getElementById("date");
if (newBtn) {
newBtn.addEventListener("click", function() {
// this is a for loop, it will run for as long as i
// is smaller than the amount of found checkboxes (checkboxes.length)
for(var i = 0; i < checkboxes.length; i++) {
// Get the checkbox from the checkboxes collection
// collection[i] means get item from collection with index i
var checkbox = checkboxes[i];
// Revert the .checked property of the checkbox
checkbox.checked = !checkbox.checked;
}
});
}
By the looks of it you just want to uncheck everything on click of button
you can just do this
var newBtn = document.getElementById("date");
if (newBtn) {
newBtn.addEventListener("click", function() {
document.getElementById("Agent").checked =
document.getElementById("Customer").checked =
document.getElementById("Phone").checked =
document.getElementById("ID_Card").checked = false;
});
}

Remove selected rows on a button click in angular js

I have a table with check box for each row .
I need to remove the rows for the selected check boxes in the table on a button click. (this button is outside ng-repeat).
The index of the selected rows are populated to an array using ng-change function but i'm unable to remove the selected rows on a single button click
Here is the Fiddle
HTML
<div ng-app="approvalApp">
<div ng-controller="SimpleApprovalController" >
<table style="width:90%" border="5" >
<tr>
<th><input type="checkbox" ng-model="CheckAllData" ng- change="selectAll()" /></th>
<th>Date</th>
<th>AssociateID</th>
<th>Check-In</th>
<th>Checkout</th>
</tr>
<tr data-ng-repeat="approval in approvalitems">
<td><input type="checkbox" value="{{approval.ReqId}}" data-ng-model="approval.selected" data-ng-change="SelectDeselect($index)"/></td>
<td>{{approval.Date}}</td>
<td>{{approval.AssociateID}}</td>
<td>{{approval.CheckIn}}</td>
<td>{{approval.Checkout}}</td>
</tr>
</table>
<input type="button" value="Approve" data-ng-model="ApproveIndex" data-ng-click="ApproveRequest()" />
Script
$scope.SelectDeselect=function(index)
{
$scope.getIndexvalues = [];
angular.forEach($scope.approvalitems, function (approval,index) {
if (!!approval.selected) {
$scope.getIndexvalues.push(index);
$scope.CheckAllData = false;
}
});
console.log($scope.getIndexvalues);
};
$scope.ApproveRequest = function () {
$scope.selectedIdsArray = [{}];
angular.forEach($scope.approvalitems, function (item) {
if (!!item.selected) {
$scope.selectedIdsArray.push({ Reqid: item.ReqId, Status: "Approved" });
$scope.CheckAllData = false;
}
});
};
};
So how to use getIndexvalues in approverequest function , or is there any better way to remove it using other angular directive.
I'm a newbie to angular js .
Fiddle: http://jsfiddle.net/jpk547zp/1/
$scope.ApproveRequest = function () {
$scope.selectedIdsArray = [{}];
$scope.approvalitemsNew = [];
angular.forEach($scope.approvalitems, function (item) {
if (!!item.selected) {
$scope.selectedIdsArray.push({ Reqid: item.Date, Status: "Approved" });
$scope.CheckAllData = false;
item.hideThis = true;
console.log($scope.selectedIdsArray);
} else {
$scope.approvalitemsNew.push(item);
}
});
$scope.approvalitems = $scope.approvalitemsNew;
$scope.getIndexvalues = [];
};
Hope this helps.
you can simply do
$scope.ApproveRequest = function () {
$scope.approvalitems = $scope.approvalitems.filter(function(i){
return !i.selected;
});
};

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.

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