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How to dynamically change the price via incrementing the input number

I create my personal project, and I called this system as ordering system I used laravel for this and the front end javascript and jquery.
I have question
Question:
I used the append function of jquery to transfer value to other side. so i append input type number which the value automatically equal to 1
The question if I increment the value of input type number how the price double if i increase the value of number?
Example of my output
My Front end Codes:
var tbody = $('#myTable').children('tbody');
//Then if no tbody just select your table
var table = tbody.length ? tbody : $('#myTable');
//my logic to increment quantity but not working.
$("#qty_change").bind('keyup mouseup', function () {
alert("changed");
});
//function for getting the data from search product by clicking to the table row
$("tr#productClicked").click(function () {
//to get the price in tr
var price = $(this).closest("tr").find(".menu_price").text();
//to get the menu in tr
var menu_name = $(this).closest("tr").find(".menu_name").text();
//row count
var rowCount = $('table#myTable tr:last').index() + 1;
//append input to quantity the value is 1
var input = '<input type="number" name="qty_number" class="form-control" value="1" id="qty_change" />';
//Item must be editable
var contenteditable = 'contenteditable=true';
table.append('<tr><td>'+rowCount+'</td><td class="total">'+input+'</td><td '+contenteditable+'>'+menu_name+'</td><td>'+price+'</td><td>'+price+'</td></tr>');
});
Html Table:
<table class="table table-hover" id="myTable">
<thead>
<tr style="font-size: 14px; ">
<th scope="col">#</th>
<th scope="col">Qty</th>
<th scope="col">Item</th>
<th scope="col" style="text-align: right">Cost</th>
<th scope="col" style="text-align: right">Total</th>
</tr>
</thead>
<tbody style="font-size:14px;">
<tr>
{{-- <td>1</td>
<td>x 2</td>
<td contenteditable='true'>Feast Chicken</td>
<td align="right">$10.00</td>
<td align="right">$20.00</td> --}}
</tr>
</tbody>
</table>
New update:
$('.amount > input[type="number"]').on('input', updateTotal);
function updateTotal(e){
var value = e.target.value;
// Don't do anything if value is not valid
// else you will see NaN in result.
if (!value || value < 0)
return;
var $parentRow = $(e.target).parent().parent();
var $siblingTotal = $parentRow.find('.total');
var $siblingCost = $parentRow.find('.cost');
var cost = $siblingCost.text();
// parseInt and parseFloat because
// `value` and `cost` are strings.
value = parseInt(value);
cost = parseFloat(cost);
$siblingTotal.text(value * cost);
}
$("tr#productClicked").click(function () {
swal({
title: "Are you sure?",
text: "Once you will add it will automatically send to the cart",
icon: "warning",
buttons: true,
dangerMode: true,
})
.then((willDelete) => {
if (willDelete) {
swal("Poof! Your imaginary file has been deleted!", {
icon: "success",
});
swal("Menu Added", "You clicked the button!", "success");
//to get the price in tr
var price = $(this).closest("tr").find(".menu_price").text();
//to get the menu in tr
var menu_name = $(this).closest("tr").find(".menu_name").text();
//row count
var rowCount = $('table#myTable tr:last').index() + 1;
//append input to quantity the value is 1
var input = '<input type="number" value="1">';
//Item must be editable
var contenteditable = 'contenteditable=true';
table.append('<tr><td>'+rowCount+'</td><td class="amount">'+input+'</td><td '+contenteditable+'>'+menu_name+'</td><td class="cost">'+price+'</td><td class="total">'+price+'</td></tr>');
} else {
swal("Cancelled");
}
});
});

Listen for "input" event using jQuery's .on.
(Please note that "input" event has nothing to do with jQuery, it's a native JavaScript thing.)
This is a sample code, because the code you provided is not complete. But you should be able to get the concept:
Usual code sample
$('.amount > input[type="number"]').on('input', updateTotal);
function updateTotal(e){
var amount = parseInt(e.target.value);
if (!amount || amount < 0)
return;
var $parentRow = $(e.target).parent().parent();
var cost = parseFloat($parentRow.find('.cost').text());
var total = (cost * amount).toFixed(2);
$parentRow.find('.total').text(total);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
<thead>
<tr>
<th>Input</th>
<th>Cost per item</th>
<th>Total</th>
</tr>
</thead>
<tbody>
<tr>
<td class="amount"><input type="number" value="1"></td>
<td class="cost">27</td>
<td class="total">27</td>
</tr>
<tr>
<td class="amount"><input type="number" value="1"></td>
<td class="cost">14.50</td>
<td class="total">14.50</td>
</tr>
</tbody>
</table>
For the sake of understanding
// Get all inputs with type="number"
// that is a child of <td class="amount">.
var $amountInput = $('td.amount > input[type="number"]');
// Attach "input" event listener to the input fields
// so that we know when the value changes and handle the changes.
// In this case, the event handler is the function "updateTotal".
$amountInput.on('input', updateTotal);
function updateTotal(e){
// Get the `input` element that triggers this event.
var $thisInput = $(e.target);
// Get the value of $thisInput
var amount = $thisInput.val();
// The `value` is a string,
// so we need `parseInt` to make it a number.
// Use `parseInt` because quantity can't have decimals.
amount = parseInt(amount);
// Don't do anything if value is not valid
// else you will see NaN in result.
if (!amount || amount < 0)
return;
// Get the parent <tr> of this input field
var $parentRow = $thisInput.parent().parent();
// Find the <td class="total"> element
var $siblingTotal = $parentRow.find('.total');
// Find the <td class="cost"> element
var $siblingCost = $parentRow.find('.cost');
// Get the cost from <td class="cost"> element
var cost = $siblingCost.text();
// The "cost" is a string,
// so we need `parseFloat` to make it a number.
// Use `parseFloat` because cost can have decimals.
cost = parseFloat(cost);
// Calculate the total cost
var total = amount * cost;
// .toFixed(2) to force 2 decimal places
total = total.toFixed(2);
// Update the total cost into <td class="total"> element
$siblingTotal.text(total);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
<thead>
<tr>
<th>Input</th>
<th>Cost per item</th>
<th>Total</th>
</tr>
</thead>
<tbody>
<tr>
<td class="amount"><input type="number" value="1"></td>
<td class="cost">27</td>
<td class="total">27</td>
</tr>
<tr>
<td class="amount"><input type="number" value="1"></td>
<td class="cost">14.50</td>
<td class="total">14.50</td>
</tr>
</tbody>
</table>
Note
If you still have difficulties understanding, you might want to read:
Why prefix "$" sign in only some variable names? (Generally called the Hungarian Notation)
What is td.amount > input[type="number"]?
What is jQuery's .on()?
What is e.target?
What is jQuery's .val()?
What is parseInt()?
What is parseFloat()?
What does !value mean?
Why do you return nothing?
What is jQuery's .parent()?
What is jQuery's .find()?
What is jQuery's .text()?
What is .toFixed()?

Enable/Disable button in AngularJS

I have a table that has a checkbox. It has a select ALL javascript function and a select one by one function. My html file looks like this for the delete button:
<button data-toggle="modal" data-target="#rejectModal" contenteditable="false" id="delbutton" ng-model="delbutton" ng-disabled="countChecked() == 0">Delete</span></button>
Select All Checkbox:
<th class="">
<input type="checkbox" name="select" id="checkAll" ng-model="selectAllRawSCP"/>
</th>
table details:
<tr ng-repeat=" item in rawSCAP | orderBy:sort">
<td>
<input type="checkbox" name="select" value="checked" ng-model="item.checked"/>
</td>
I used the code I saw in one of the answers here in stack overflow to disable the delete button if there is no checkbox checked. It looks like this:
$scope.countChecked = function(){
var count = 0;
angular.forEach($scope.rawSCAP, function(value){
if (value.checked) count++;
});
return count;
}
But using this, my page returns an error which isTypeError: Cannot read property 'checked' of null
And also I need to enable delete button even if I used select all

The error is pretty clear, it cannot access the property checked of the rawSCAP itens. You have to guarantee rawSCAP itens checked property is not null before you try to use it in ng-model.
You could try to initialize it before with some value you want. Check this on how to do it.

There are some conditions you need to follow to use the <<ng-model>>.checked, which is a plain array can't be used for checkbox, it must be an array of objects. Also please change your function to below.
$scope.countChecked = function() {
var count = 0;
angular.forEach($scope.rawSCAP, function(value) {
value.checked = value.checked || 0;
if (value.checked) count++;
});
return count;
}
The main line which does the work is value.checked = value.checked || 0; Here if the value.checked is undefined, then the 0 will get assigned to value.checked, hence you won't get the error!
var app = angular.module('myApp', []);
app.controller('MyController', function MyController($scope) {
$scope.rawSCAP = [{
item: 1
}, {
item: 2
}, {
item: 3
}, {
item: 4
}, {
item: 5
}, {
item: 6
}, {
item: 7
}];
$scope.countChecked = function() {
var count = 0;
angular.forEach($scope.rawSCAP, function(value) {
value.checked = value.checked || 0;
if (value.checked) count++;
});
return count;
}
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-controller='MyController' ng-app="myApp">
<button data-toggle="modal" data-target="#rejectModal" contenteditable="false" id="delbutton" ng-model="delbutton" ng-disabled="countChecked() == 0">Delete</button>
<table>
<th class="">
<input type="checkbox" name="select" id="checkAll" ng-model="selectAllRawSCP" />
</th>
<tr ng-repeat=" item in rawSCAP | orderBy:sort">
<td>
<input type="checkbox" name="select" value="checked" ng-model="item.checked" />{{item.item}}
</td>
</tr>
</table>
</div>

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;
});
};

ng-enter directive and select attribute confilicted with each other

Consider this code:
<typeahead class="typeahead"
search="searchPersonage(term)"
select="selectPersonage(item)"
ng-model="typeaheadModel"
ng-enter='selectCustomer(typeaheadModel)'>
<table class="table">
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr typeahead-item="customerPhone"
ng-repeat="customerPhone in customerPhones">
<td>{{customerPhone.Title}}</td>
<td>{{customerPhone.Value}}</td>
</tr>
</tbody>
</table>
</typeahead>
as you can see I have a typeahead tag and in this tag i have ng-enter directive and select attribute. What I need is when an unkown phone number is entered by user and if that number is not in typeahead objects and then user hits the enter button, I want it to be pushed in an array. But I want only that unknown number to be pushed.
However, now when user hits the enter button, not only the number is pushed in the array but also the select method is called. This causes the unknown number to be pushed into the target array, alongside an object from typeahead data source.
$scope.selectCustomer = function (item) {
$scope.selectedPhones.push({
Value: item.Value,
Title: item.Title
});
};
$scope.selectPhone = function (item) {
for (var i = 0; i < $scope.customerPhones.length; i++) {
if (item == $scope.customerPhones[i].Title
|| item == $scope.customerPhones[i].Value) {
$scope.selectedPhones.push({
Value: $scope.customerPhones[i].Value,
Title: $scope.customerPhones[i].Title
});
$scope.customerPhones = [];
flag = false;
}
}
if (flag) {
if (item.match("^09[0-3][0-9]{8}$")) {
$scope.selectedPhones.push({
Value: item,
Title: 'Unknown'
});
$scope.customerPhones = [];
}
else {
toaster.showError('This number is not valid : ' + item);
$scope.customerPhones = [];
}
}
$scope.typeaheadModel = "";
flag = true;
}

In angular -ui indexOf function is undefined

I am trying to add the delete function for the option list:
But always getting the error message: indexOf is undefined!
Could someone help me on that? Thanks in advance!
Here is part of my code:
Html:
<div class="question_typeList" ng-switch-default>
<table class="question_heading">
<tbody>
<tr ng-repeat="option in question.options">
<td>
<input class="question_textfield" placeholder="My Option" ng-model="option.value[lang]">
<button ng-click="removeOption(option)">X</button>
</td>
<td>
{{option.value}}
</td>
</tr>
</tbody>
{{question.options}}
</table>
<button ng-click="newOption(question)">Add Options</button>
</div>
js part:
$scope.questions = [
{
title: $scope.newTranslatable("Title"),
description: $scope.newTranslatable("Mr./Mrs./Ms."),
type: "list",
options: [
{
value: $scope.newTranslatable("Mr")
}, {
value: $scope.newTranslatable("Mrs")
}, {
value: $scope.newTranslatable("Ms")
}
]
}
$scope.removeOption = function(option) {
var index = $scope.questions.options.indexOf(option);
if(index != -1) {
$scope.questions.options.splice(index, 1);
}
}

$scope.questions is defined as an array. options is not a property of the array, but a property of an element of the array.
you'll have to iterate through the $scope.questions array. This raises a new problem because as far as I can tell, your questions array doesn't appear to have a «key» field to compare against.
Still, assuming you'll manage to get an unique field in there, this is how I think you could implement a function to remove a question[x].options option:
$scope.removeOption = function(uniqueKey,option) {
var questionIndex = $scope.questions.yourUniqueKeyField.indexOf(uniqueKey);
if(questionIndex != -1){
var optionIndex = $scope.questions[questionIndex].options.indexOf(option);
if(optionIndex != -1) {
$scope.questions[questionIndex].options[optionIndex].splice(optionIndex,1);
}
}
}