Answer to Question #260819 in HTML/JavaScript Web Application for pooja

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Answer to Question #260819 in HTML/JavaScript Web Application for pooja

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HTML/JavaScript Web Application

Question #260819

Income Tax Calculator Program

Input the Taxable Income and Compute the income tax using the following table:

*Note: Do not use prompts for user inputs. Use the HTML input tag.

over but not over Rate

--- 250,000 0%

250,000 400,000 20% of the excess over 250,000

400,000 800,000 30,000+25% of the excess over 400,000

800,000 2,000,000 130,000+30% of the excess over 800,000

2,000,000 8,000,000 490,000+32% of the excess over 2,000,000

8,000,000 ---- 2,410,000+35% of the excess over 8,000,000

Ex)

Taxable Income Income Tax

180,000 0

320,000 14,000

520,000 60,000

930,000 169,000

2,400,000 618,000

10,000,000 3,110,000

Expert's answer

index.html

<!doctype html>
<html>
  <head>
    <meta http-equiv='Content-Type' content='text/html;charset=utf-8' />
    <title>Tax calculator</title>
    <link rel='stylesheet' href='css/styles.css'/>
  </head>
<body>
  <div class='container'>
    <div class='verdict'>
      <p>Last year: </p>
      <p>This year: </p>
    </div>
    <div class='question'>
      <p>All other things being equal, how do the new income tax bands affect you?</p>
    </div>
    <div class='input'>
      <input type='text' class='salary' placeholder='Enter your annual salary figure here to find out'/>
      <input type='button' value='Submit' class='submit'>
    </div>
  </div>


  <script src='js/jquery.js'></script>
  <script src='js/currency.js'></script>
  <script src='js/main.js'></script>
  <script src="//interactive.guim.co.uk/libs/iframe-messenger/iframeMessenger.js"></script>
  <script>iframeMessenger.resize(135);</script>
</body>
</html>

styles.css

@font-face {
	font-family:'Guardian Agate Sans';
	src:url('http://s3.amazonaws.com/gdn-cdn/fonts/ascii/Guardian Ag Sans 1 Web-Reg.eot');
	src:url('http://s3.amazonaws.com/gdn-cdn/fonts/ascii/Guardian+Ag+Sans+1+Web-Reg.eot?#iefix') format('embedded-opentype'),url('http://s3.amazonaws.com/gdn-cdn/fonts/ascii/Guardian+Ag+Sans+1+Web-Reg.woff') format('woff'),url('http://s3.amazonaws.com/gdn-cdn/fonts/ascii/Guardian+Ag+Sans+1+Web-Reg.ttf') format('truetype'),url('http://s3.amazonaws.com/gdn-cdn/fonts/ascii/Guardian+Ag+Sans+1+Web-Reg.svg#Guardian+Text+Egyp+Web-Reg') format('svg');
	font-weight:400;
	font-style:normal;
	font-stretch:normal;
}


body {
	margin: 0;
	padding: 0;
}


.container{
	font-size: 14px;
	width:100%;
	height: 135px;
	font-family: 'Guardian Agate Sans', Georgia, serif;
	background-color: rgba(249,249,247,0.9);
	border-top: 1px solid #929497;
	border-bottom: 1px solid #929497;
}


.input {
	width: 100%;
	height: 50px;
	display: block;
	clear: both;
}


.question {
	float: right;
	width: 45%;
	height: 80px;
	margin: 0 0 0.5em 0;
}


.question p {
	line-height: 16px;
}


.verdict {
	border-right:1px dotted #676767;
	display: block;
	width: 50%;
	height: 80px;
	color: black;
	float: left;
	color: #194377;
	font-size: 1em;
	margin: 0 4% 0.5em 0;
	text-align: center;
}


.verdict p {
	margin: 14px 0 0 0;
}


.salary {
	width: 70%;
	float: left;
	height: 25px;
}


.salary:focus {
	border:1px solid #194377;
}


.submit {
	padding: 5px; 
	background: #194377; 
	font-family: "Guardian Agate Sans", Arial, sans-serif;
	font-weight: bold;
	color: #FFFFFF;
	float: left;
	border: 0 none;
    cursor: pointer;
    width: 20%;
    height: 30px;
    margin: 0 10px 0 10px;
}

main.js

$(function() {


  'use strict';


  var taxationSystemFormer = [
    {'name': 'PersonalAllowance', 'taxThreshold': 10000, 'pc': 0},
    {'name': 'BasicRate', 'taxThreshold': 31865, 'pc': 0.20},
    {'name': 'HigherRate', 'taxThreshold': 108135, 'pc': 0.40},
    {'name': 'AdditonalRate', 'taxThreshold': 10000000, 'pc': 0.45}
  ];


  var taxationSystemCurrent = [
    {'name': 'NewPersonalAllowance', 'taxThreshold': 10500, 'pc':0},
    {'name': 'NewBasicRate', 'taxThreshold': 31785, 'pc':0.20},
    {'name': 'NewHigherRate', 'taxThreshold':107715, 'pc':0.40},
    {'name': 'NewAdditonalRate', 'taxThreshold':10000000, 'pc':0.45}
  ];


  $('.salary').autoNumeric('init', {'aSep': ',', 'aSign': '£', 'vMin': '0'});


  $(document).keypress(function(e) {
      if (e.which === 13) {
        $('.submit').trigger('click');
      }
  });


  $('.submit').click(function(e) {
    e.preventDefault();
    var yearlySalary = parseInt($('.salary').autoNumeric('get'), 10);
    var oldAmount = calculateTaxation(yearlySalary, taxationSystemFormer);
    var newAmount = calculateTaxation(yearlySalary, taxationSystemCurrent);
    var taxationChangeString;


    $('.verdict p:first').html('Est. tax 14/15: £' + oldAmount);
    $('.verdict p:last').html('Est. tax 15/16: £' + newAmount);


    if (oldAmount > newAmount)
       taxationChangeString = ('£' + (oldAmount - newAmount)) + ' better off';
    if (oldAmount < newAmount)
       taxationChangeString = ('£' + (newAmount - oldAmount)) + ' worse off';
    if (oldAmount === newAmount)
      taxationChangeString = 'No change';


  });


  function calculateTaxation(yearlySalary, taxationSystem) {
    var taxableSalary;
    var taxLiability = 0;


    if (yearlySalary < 1e5) {
      taxableSalary = yearlySalary - taxationSystem[0]['taxThreshold'];
    } else {
      var adjustedPersonalAllowance = taxationSystem[0]['taxThreshold'] - ((yearlySalary - 1e5) / 2);
      if (adjustedPersonalAllowance < 0) {
        taxableSalary = yearlySalary - taxationSystem[0]['taxThreshold'];
      } else {
        taxableSalary = yearlySalary - adjustedPersonalAllowance;
      }
    }


    var firstBandTaxLiability = 0;
    var secondBandTaxLiability = 0;
    var thirdBandTaxLiability = 0;
    var fourthBandTaxLiability = 0;


    // CALCULATE SECOND BAND LIABILITY
    if (taxableSalary > 0) {
      if (taxableSalary > taxationSystem[1]['taxThreshold']) {
        secondBandTaxLiability = (taxationSystem[1]['taxThreshold']) * taxationSystem[1]['pc'];
      } else {
        secondBandTaxLiability = taxableSalary * taxationSystem[1]['pc'];
      }
    }


    // CALCULATE THIRD BAND LIABILITY
    if (taxableSalary > taxationSystem[1]['taxThreshold']) {
      if (taxableSalary > taxationSystem[3]['taxThreshold']) {
        thirdBandTaxLiability = (taxationSystem[2]['taxThreshold']) * taxationSystem[2]['pc'];
      } else {
        thirdBandTaxLiability = (taxableSalary - taxationSystem[1]['taxThreshold']) * taxationSystem[2]['pc'];
      }
    }


    // CALCULATE FOURTH BAND LIABILITY
    if (taxableSalary > taxationSystem[3]['taxThreshold']) {
      fourthBandTaxLiability = (taxableSalary - taxationSystem[3]['taxThreshold']) * taxationSystem[3]['pc'];
    }


    // console.log('FIRST BAND LIABILITY: ' + firstBandTaxLiability);
    // console.log('SECOND BAND LIABILITY: ' + secondBandTaxLiability);
    // console.log('THIRD BAND LIABILITY: ' + thirdBandTaxLiability);
    // console.log('FOURTH BAND LIABILITY: ' + fourthBandTaxLiability);


    taxLiability = firstBandTaxLiability + secondBandTaxLiability + thirdBandTaxLiability + fourthBandTaxLiability;


    return taxLiability;
  }


});

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Answer to Question #260819 in HTML/JavaScript Web Application for pooja

Income Tax Calculator Program

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