var arr = [{ "Name": "Alex", "sex":"man","age":50,"workplace":"office"},
{"Name": "Katya", "sex":"woman","age":33,"workplace":"office"},
{"Name": "Igor", "sex":"man","age":22,"workplace":"park"},
{"Name": "Olga", "sex":"woman","age":19,"workplace":"park"},
{"Name": "Maks", "sex":"man","age":40,"workplace":"hotel"}
var arr2 = [];
for(var prop in arr){
if(arr[prop].workplace == "office" || arr[prop].workplace == "hotel"){
arr2.push(arr[prop]);
}
}
div * {opasity: 0;}
let parentElement = document.querySelector('div').parentNode;
parentElement.addEventListener('click', function (e) {
let elemArr = e.target.children;
for(let i = 0; i < elemArr.lenght; i++) {
elemArr[i].style.opasity = '1';
}
});
<select class="custom-select sel_auto_mod" name="card" id="card">
<select name="paper" id="paper" class="sel_serv_mod" multiple>
<?-- заменить на -->
<select name="paper" id="paper" class="sel_serv_mod">
document.getElementById("month-sum").value
- вернет строку)+document.getElementById("month-sum").value
parseInt();
function sum(){
let mainMonthBudget = +document.getElementById("month-sum").value; //графа бюджета за месяц
let transportExpenses = +document.getElementById("bus-sum").value; //графа расходов на проезд
let foodExpenses = +document.getElementById("food-sum").value; //графа расходов на еду
let funExpenses = +document.getElementById("fun-sum").value; //графа расходов на развлечения
let clearBudget = mainMonthBudget - (transportExpenses + foodExpenses + funExpenses);
window.alert("Your budget is " + clearBudget);
}