У вас есть опечатка в:
getInput: function() {
return {
type: document.querySelector(DOMstrings.inputType).value, // inc or exp
description: document.querySelector(DOMstrings.inputDescription).value,
//________^ The s is missing
value: document.querySelector(DOMstrings.inputValue).value
};
},
Вы смешиваете описание и описание , будьте последовательны
var budgetController = (function() {
var Expense = function(id, description, value) {
this.id = id;
this.description = description;
this.value = value;
};
var Income = function(id, description, value) {
this.id = id;
this.description = description;
this.value = value;
};
var data = {
allItems: {
exp: [],
inc: []
},
total: {
exp: 0,
inc: 0
}
};
return {
addItems: function(type, des, val) {
var newItem, ID;
if (data.allItems[type].length > 0) {
ID = data.allItems[type][data.allItems[type].length - 1].id + 1;
} else {
ID = 0;
}
if (type === 'exp') {
newItem = new Expense(ID, des, val);
} else if (type === 'inc') {
newItem = new Income(ID, des, val);
}
data.allItems[type].push(newItem);
return newItem;
},
//testing purpose
testing: function() {
console.log(data);
}
};
})();
//UI CONTROLLER
var UIController = (function() {
var DOMstrings = {
inputType: '.add__type',
inputDescription: '.add__description',
inputValue: '.add__value',
inputButton: '.add__btn',
incomeContainer: '.income__list',
expensesContainer: '.expenses__list',
};
return {
getInput: function() {
return {
type: document.querySelector(DOMstrings.inputType).value, // inc or exp
description: document.querySelector(DOMstrings.inputDescription).value,
value: document.querySelector(DOMstrings.inputValue).value
};
},
addListitem: function(obj, type) {
var html, newHtml, element;
//create HTML string with placeholder text
if (type === 'inc') {
element = DOMstrings.incomeContainer;
html = '<div class="item clearfix" id="income-%id%"><div class="item__description">%description%</div><div class="right clearfix"><div class="item__value">%value%</div><div class="item__delete"><button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button></div></div></div>';
} else if (type === 'exp') {
element = DOMstrings.expensesContainer;
html = '<div class="item clearfix" id="expense-%id%"><div class="item__description">%description%</div><div class="right clearfix"><div class="item__value">%value%</div><div class="item__percentage">21%</div><div class="item__delete"><button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button></div></div></div>';
}
//replace placeholder text with some actual data
newHtml = html.replace('%id%', obj.id);
newHtml = newHtml.replace('%description%', obj.description);
newHtml = newHtml.replace('%value%', obj.value);
//insert the HTML into DOM
document.querySelector(element).insertAdjacentHTML('beforeend', newHtml);
},
getDOMstrings: function() {
return DOMstrings;
}
};
})();
//CONTROLLER
var controller = (function(budgetCtrl, UICtrl) {
var setupEventListeners = function() {
var DOM = UICtrl.getDOMstrings();
document.querySelector(DOM.inputButton).addEventListener('click', ctrlAddItem);
document.addEventListener('keypress', function(event) {
if (event.keyCode === 13 || event.which === 13) {
ctrlAddItem();
}
});
};
var ctrlAddItem = function() {
var input, newItem;
//get the field input data
input = UICtrl.getInput();
//add the item to the budget controller
newItem = budgetCtrl.addItems(input.type, input.description, input.value);
//add the item to UI
UICtrl.addListitem(newItem, input.type);
//calculate the budget
//display budget on UI
};
return {
init: function() {
//testing purpose
console.log('hello');
setupEventListeners();
}
};
})(budgetController, UIController);
controller.init();
<meta charset="UTF-8">
<link href="https://fonts.googleapis.com/css?family=Open+Sans:100,300,400,600" rel="stylesheet" type="text/css">
<link href="http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet" type="text/css">
<body>
<div class="top">
<div class="budget">
<div class="budget__title">
Available Budget in <span class="budget__title--month">%Month%</span>:
</div>
<div class="budget__value">+ 2,345.64</div>
<div class="budget__income clearfix">
<div class="budget__income--text">Income</div>
<div class="right">
<div class="budget__income--value">+ 4,300.00</div>
<div class="budget__income--percentage"> </div>
</div>
</div>
<div class="budget__expenses clearfix">
<div class="budget__expenses--text">Expenses</div>
<div class="right clearfix">
<div class="budget__expenses--value">- 1,954.36</div>
<div class="budget__expenses--percentage">45%</div>
</div>
</div>
</div>
</div>
<div class="bottom">
<div class="add">
<div class="add__container">
<select class="add__type">
<option value="inc" selected>+</option>
<option value="exp">-</option>
</select>
<input type="text" class="add__description" placeholder="Add description">
<input type="number" class="add__value" placeholder="Value">
<button class="add__btn"><i class="ion-ios-checkmark-outline"></i></button>
</div>
</div>
<div class="container clearfix">
<div class="income">
<h2 class="income__title">Income</h2>
<div class="income__list">
<!--
<div class="item clearfix" id="income-0">
<div class="item__description">Salary</div>
<div class="right clearfix">
<div class="item__value">+ 2,100.00</div>
<div class="item__delete">
<button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button>
</div>
</div>
</div>
<div class="item clearfix" id="income-1">
<div class="item__description">Sold car</div>
<div class="right clearfix">
<div class="item__value">+ 1,500.00</div>
<div class="item__delete">
<button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button>
</div>
</div>
</div>
-->
</div>
</div>
<div class="expenses">
<h2 class="expenses__title">Expenses</h2>
<div class="expenses__list">
<!--
<div class="item clearfix" id="expense-0">
<div class="item__description">Apartment rent</div>
<div class="right clearfix">
<div class="item__value">- 900.00</div>
<div class="item__percentage">21%</div>
<div class="item__delete">
<button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button>
</div>
</div>
</div>
<div class="item clearfix" id="expense-1">
<div class="item__description">Grocery shopping</div>
<div class="right clearfix">
<div class="item__value">- 435.28</div>
<div class="item__percentage">10%</div>
<div class="item__delete">
<button class="item__delete--btn"><i class="ion-ios-close-outline"></i></button>
</div>
</div>
</div>
-->
</div>
</div>
</div>
</div>
</body>
</html>