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calculator_novacore.htm
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Calculator</title>
<style>
@import url('https://fonts.googleapis.com/css?family=Poppins:300,400,500,600');
* {
margin: 0;
padding: 0;
}
body {
margin: 0;
padding: 0;
}
.window {
position: fixed;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
background: white;
width: 331px;
height: 550px;
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
border-radius: 5px 5px 5px 5px;
}
header {
background: rgb(194, 194, 194);
width: 100%;
height: 25px;
border-radius: 5px 5px 0 0;
box-shadow: 0 2px 1px 0px rgba(0, 0, 0, 0.408);
}
.close {
background: rgb(255, 109, 109);
width: 16px;
height: 16px;
border-radius: 50%;
border-width: 0;
outline: 0;
padding: 2px;
top: 4px;
left: 4px;
position: fixed;
cursor: pointer;
}
.close:active,
.close:hover {
background: red;
}
.calcu {
font-family: poppins, sans-serif;
font-weight: 400;
text-transform: uppercase;
margin: 4px;
padding: 2px;
}
#result {
height: 120px;
}
#keyboard {
height: 400px;
}
#history {
text-align: right;
height: 20px;
margin: 0 20px;
padding-top: 25px;
font-size: 15px;
font-weight: 500;
color: #919191;
}
#output {
text-align: right;
height: 20px;
margin: 0 20px;
padding-top: 20px;
font-size: 30px;
font-weight: 400;
color: black;
}
.oparator,
.number,
.empty {
width: 50px;
height: 50px;
float: left;
border-radius: 50%;
border-width: 0;
margin: 14px;
font-size: 15px;
font-weight: 500;
outline: 0;
}
.number:active {
border: 1px solid black;
background: linear-gradient(45deg, rgb(251, 251, 251), rgba(169, 169, 169, 0.285));
}
.number,
.empty {
background: white;
}
.number,
.oparator {
cursor: pointer;
}
.oparator:active,
.number:active {
font-size: 10px;
}
button:nth-child(1) {
background: #5a20b2;
font-size: 20px;
color: white;
}
button:nth-child(2) {
background: #2069b2;
font-size: 20px;
color: white;
}
button:nth-child(3) {
background: #49b220;
font-size: 20px;
color: white;
}
button:nth-child(4) {
background: #20b2aa;
font-size: 20px;
color: white;
}
button:nth-child(8) {
background: #ffa500;
font-size: 20px;
color: white;
}
button:nth-child(12) {
background: #f08080;
font-size: 35px;
color: white;
}
button:nth-child(16) {
background: #7d93e0;
color: white;
font-size: 20px;
}
button:nth-child(20) {
background: rgb(255, 114, 114);
font-size: 20px;
color: white;
}
</style>
</head>
<body>
<div class="window">
<header>
<div class="close"></div>
</header>
<div class="calcu">
<div id="result">
<div id="history">
<p id="history-value"></p>
</div>
<div id="output">
<p id="output-value">0</p>
</div>
</div>
<div id="keyboard">
<button class="oparator" id="clear">C</button>
<button class="oparator" id="backspace">CE</button>
<button class="oparator" id="%">%</button>
<button class="oparator" id="/">÷</button>
<button class="number" id="7">7</button>
<button class="number" id="8">8</button>
<button class="number" id="9">9</button>
<button class="oparator" id="*">×</button>
<button class="number" id="4">4</button>
<button class="number" id="5">5</button>
<button class="number" id="6">6</button>
<button class="oparator" id="-">-</button>
<button class="number" id="1">1</button>
<button class="number" id="2">2</button>
<button class="number" id="3">3</button>
<button class="oparator" id="+">+</button>
<button class="empty" id="empty"></button>
<button class="number" id="0">0</button>
<button class="empty" id="empty"></button>
<button class="oparator" id="=">=</button>
</div>
</div>
</div>
<script>
function getHistory() {
return document.getElementById("history-value").innerText;
}
function printHistory(num) {
document.getElementById("history-value").innerText = num;
}
function getOutput() {
return document.getElementById("output-value").innerText;
}
function printOutput(num) {
if (num == "") {
document.getElementById("output-value").innerText = num;
} else {
document.getElementById("output-value").innerText = getFormattedNumber(num);
}
}
function getFormattedNumber(num) {
if (num == "-") {
return "";
}
var n = Number(num);
var value = n.toLocaleString("en");
return value;
}
function reverseNumberFormat(num) {
return Number(num.replace(/,/g, ''));
}
var operator = document.getElementsByClassName("oparator");
for (var i = 0; i < operator.length; i++) {
operator[i].addEventListener('click', function () {
if (this.id == "clear") {
printHistory("");
printOutput("");
} else if (this.id == "backspace") {
var output = reverseNumberFormat(getOutput()).toString();
if (output) { //if output has a value
output = output.substr(0, output.length - 1);
printOutput(output);
}
} else {
var output = getOutput();
var history = getHistory();
if (output == "" && history != "") {
if (isNaN(history[history.length - 1])) {
history = history.substr(0, history.length - 1);
}
}
if (output != "" || history != "") {
output = output == "" ? output : reverseNumberFormat(output);
history = history + output;
if (this.id == "=") {
var result = eval(history);
printOutput(result);
printHistory("");
} else {
history = history + this.id;
printHistory(history);
printOutput("");
}
}
}
});
}
var number = document.getElementsByClassName("number");
for (var i = 0; i < number.length; i++) {
number[i].addEventListener('click', function () {
var output = reverseNumberFormat(getOutput());
if (output != NaN) { //if output is a number
output = output + this.id;
printOutput(output);
}
});
}
</script>
</body>
</html>