Created
November 20, 2019 04:10
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Javascript Calculator by BoCode
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<div class='container'> | |
<div id='calculator'> | |
<!-- TITLE --> | |
<div id='title' class='text-center'> | |
<h5><b>BASIC CALCULATOR</b></h5> | |
</div> | |
<!-- ENTRY BOX --> | |
<div id='entrybox' class='text-right'> | |
<div id='entry'> | |
<p id='answer'>0</p> | |
</div> | |
<div id='history'> | |
<p>0</p> | |
</div> | |
</div> | |
<!-- BUTTONS --> | |
<div id='buttons'> | |
<button class='red' value='ac'>AC</button> | |
<button class='red' value='ce'>CE</button> | |
<button value='/'>÷</button> | |
<button value='*'>x</button> | |
<button value='7'>7</button> | |
<button value='8'>8</button> | |
<button value='9'>9</button> | |
<button value='-'>-</button> | |
<button value='4'>4</button> | |
<button value='5'>5</button> | |
<button value='6'>6</button> | |
<button value='+'>+</button> | |
<button value='1'>1</button> | |
<button value='2'>2</button> | |
<button value='3'>3</button> | |
<button class='invisible'>N</button> | |
<button id='zeroButton' value='0'>0</button> | |
<button value='.'>.</button> | |
<button id='equalButton' value='='>=</button> | |
</div> | |
<!-- end buttons --> | |
<div id='tester'></div> | |
</div> | |
<!-- end calculator --> | |
</div> | |
<!-- end container --> | |
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// final draft | |
$(document).ready(function() { | |
var entry = ''; | |
var ans = ''; | |
var current = ''; | |
var log = ''; | |
var decimal = true; | |
var reset = ''; | |
// round function if answer includes a decimal | |
function round(val) { | |
val = val.toString().split(''); | |
if (val.indexOf('.') !== -1) { | |
var valTest = val.slice(val.indexOf('.') + 1, val.length); | |
val = val.slice(0, val.indexOf('.') + 1); | |
var i = 0; | |
while (valTest[i] < 1) { | |
i++ | |
} | |
valTest = valTest.join('').slice(0, i + 2); | |
if (valTest[valTest.length-1] === '0') { | |
valTest = valTest.slice(0, -1); | |
} | |
return val.join('') + valTest; | |
} else { | |
return val.join(''); | |
} | |
} | |
$('button').click(function() { | |
entry = $(this).attr("value"); | |
console.log('entry: ' + entry); | |
//reset for log after answer to equation. | |
if (reset) { | |
if (entry === '/' || entry === '*' || entry === '-' || entry === '+') { | |
log = ans; | |
} else { | |
ans = ''; | |
} | |
} | |
reset = false; | |
// All clear or Clear Entry | |
if (entry === 'ac' || entry === 'ce' && current === 'noChange') { | |
ans = ''; | |
current = ''; | |
entry = ''; | |
log = ''; | |
$('#history').html('0'); | |
$('#answer').html('0'); | |
decimal = true; | |
} else if (entry === 'ce') { | |
$('#history').html(log.slice(0, -current.length)); | |
log = log.slice(0, -current.length); | |
ans = ans.slice(0, -current.length); | |
current = ans; | |
if (log.length === 0 || log === ' ') { | |
$('#history').html('0'); | |
} | |
$('#answer').html('0'); | |
entry = ''; | |
decimal = true; | |
} | |
// prevents more than one deciminal in a number | |
if (entry === '.' || entry === '0.') { | |
if (!decimal) { | |
entry = ''; | |
} | |
} | |
// prevents improper use of first digit | |
if (ans.length === 0 && isNaN(entry) && entry !== '.' || ans.length === 0 && entry === '0') { | |
entry = ''; | |
ans = ''; | |
} | |
// prevents extra operators | |
if (current !== 'noChange') { | |
if (current === '' && isNaN(entry) && entry !== '.' || isNaN(current) && isNaN(entry) && entry !== '.') { | |
entry = ''; | |
} | |
} | |
// digit combining | |
while (Number(entry) || entry === '0' || current === '.') { | |
if (isNaN(current) && entry === '0' && current !== '.') { | |
entry = ''; | |
} else if (isNaN(current) && Number(entry) && current !== '.') { | |
current = ''; | |
} | |
if (entry === '.') { | |
decimal = false; | |
} | |
if (current === '0.' && isNaN(entry)) { | |
entry = ''; | |
} else { | |
if (current[current.length - 1] === '.') { | |
current = current.concat(entry); | |
} else { | |
current += entry; | |
} | |
ans += entry; | |
$('#answer').html(current); | |
log += entry; | |
$('#history').html(log); | |
entry = ''; | |
} | |
} | |
// Operation list | |
if (entry === '.') { | |
if (current === '' || isNaN(current[current.length - 1])) { | |
current = '0.'; | |
ans += entry; | |
$('#answer').html('0.'); | |
log += current; | |
$('#history').html(log); | |
} else { | |
current = current.concat('.'); | |
ans = ans.concat('.'); | |
log = ans; | |
$('#history').html(ans); | |
$('#answer').html(current); | |
} | |
entry = ''; | |
decimal = false; | |
} else if (entry === '/') { | |
current = '/'; | |
ans = round(eval(ans)) + current; | |
log += current; | |
$('#history').html(log); | |
$('#answer').html('/'); | |
entry = ''; | |
decimal = true; | |
} else if (entry === '*') { | |
current = '*'; | |
ans = round(eval(ans)) + current; | |
log += 'x'; | |
$('#history').html(log); | |
$('#answer').html('x'); | |
entry = ''; | |
decimal = true; | |
} else if (entry === '-') { | |
current = '-'; | |
ans = round(eval(ans)) + current; | |
log += current; | |
$('#history').html(log); | |
$('#answer').html('-'); | |
entry = ''; | |
decimal = true; | |
} else if (entry === '+') { | |
current = '+'; | |
ans = round(eval(ans)) + current; | |
log += current; | |
$('#history').html(log); | |
$('#answer').html('+'); | |
entry = ''; | |
decimal = true; | |
} else if (entry === '=') { | |
if (current[current.length - 1] === '.') { | |
entry = ''; | |
} else { | |
current = eval(ans).toString(); | |
$('#answer').html(round(eval(ans))); | |
ans = round(eval(ans)); | |
log += entry + ans; | |
$('#history').html(log); | |
log = ans; | |
entry = ''; | |
reset = true; | |
decimal = true; | |
} | |
current = 'noChange'; | |
} | |
entry = ''; | |
if (reset) { | |
log = ''; | |
} | |
// max digits on screen | |
if ($('#entry').children().text().length > 8 || $('#history').text().length > 22) { | |
$('#answer').html('0'); | |
$('#history').html('Digit Limit Met'); | |
current = ''; | |
ans = ''; | |
log = ''; | |
decimal = true; | |
} | |
console.log('decimal: ' + decimal); | |
console.log('current: ' + current); | |
console.log('answer: ' + ans); | |
console.log($('#history').text().length); | |
}); | |
}); // end doc ready function |
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<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script> |
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body { | |
font-family: 'Orbitron', sans-serif; | |
background-color: BLACK; | |
} | |
#calculator { | |
height: 410px; | |
width: 300px; | |
margin-top: 10%; | |
margin-left: auto; | |
margin-right: auto; | |
background-color: #dfd8d0; | |
border: 2px solid #908b85; | |
border-radius: 20px; | |
box-shadow: 7px 10px 34px 1px rgba(0, 0, 0, 0.68), inset -1px -6px 12px 0.1px #89847e; | |
} | |
#title { | |
padding-top: 10px; | |
padding-bottom: 10px; | |
} | |
#entrybox { | |
width: 85%; | |
height: 65px; | |
margin-left: auto; | |
margin-right: auto; | |
border: 2px solid #b4b39d; | |
border-radius: 6px; | |
background-color: #c3c2ab; | |
} | |
#entry { | |
margin-right: 10px; | |
font-size: 35px; | |
} | |
#buttons { | |
font-size: 16px; | |
font-weight: bold; | |
color: #fff; | |
position: absolute; | |
display: inline-block; | |
width: 280px; | |
height: auto; | |
margin-top: 15px; | |
margin-left: 15px; | |
} | |
button { | |
border-radius: 8px; | |
border: none; | |
background-color: #3a3a3a; | |
margin: 0 4px 10px 8px; | |
height: 40px; | |
width: 50px; | |
box-shadow: 0px 3px 0px 0px #222121, inset -1px -3px 10px 1px #515151; | |
} | |
button:active { | |
transform: translate(0px, 3px); | |
box-shadow: none; | |
} | |
.row { | |
margin-top: 20px | |
} | |
#topAdjust { | |
margin-top: -52px; | |
} | |
#equalButton { | |
position: absolute; | |
margin-left: 12px; | |
margin-top: -50px; | |
height: 90px; | |
} | |
#zeroButton { | |
width: 117px; | |
} | |
.red { | |
font-size: 14px; | |
background-color: #a72d45; | |
box-shadow: 0px 3px 0px 0px #671c2a; | |
} | |
#footer { | |
font-family: 'Josefin Sans', sans-serif; | |
position: relative; | |
font-size: 16px; | |
font-weight: normal; | |
margin-top: 40px; | |
width: 100%; | |
height: 40px; | |
} | |
button, | |
button:hover, | |
button:active, | |
button:visited { | |
text-decoration: none !important; | |
outline: none !important; | |
} | |
a, | |
a:hover, | |
a:active, | |
a:visited { | |
color: #922031; | |
text-decoration: none !important; | |
outline: none !important; | |
} | |
#history { | |
/*transform: translate(-13px, -17px);*/ | |
position: relative; | |
height: 10px; | |
bottom: 17px; | |
margin-right: 14px; | |
color: #8b8b7b; | |
font-size: 12px; | |
} |
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<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" /> |
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