vcolesdev/SalaryCalculator.js

## index.html
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>VC Salary Calculator</title>
</head>
<body>
    <h1>VC Salary Calculator</h1>
    <script src="SalaryCalculator.js"></script>
    <script>
        // Example
        const yearlySalary = new SalaryCalculator({
            rate: 15.50,
            overtime: 5,
            vacationDays: 10
        })

        console.log('Gross Salary: ' + yearlySalary.gross)
        console.log('Gross Salary (Short): ' + yearlySalary.grossShortened)
        console.log('Take Home Pay: ' + yearlySalary.afterTaxes)
        console.log('Take Home Pay (Short): ' + yearlySalary.afterTaxesShortened)
    </script>
</body>
</html>

## SalaryCalculator.js
// Constants
const WORK_HOURS = 8
const TOTAL_WORK_HOURS = 2088
//const TOTAL_WORK_DAYS = 261
//const TOTAL_WORK_WEEKS = 48

const CA_STATE_TAXES = 25.6 / 100
const CA_STATE_INS_TAXES = 8.56 / 100

/**
 * SalaryCalculator()
 *
 * Calculate total yearly salary by taking the hourly rate,
 * overtime/holiday hours worked, and subtracting the sum
 * by vacation days taken.  CA Taxes are deducted from this
 * total to represent "take home" pay before federal taxes.
 *
 * @author: Vanessa Coles (VMC Design)
 * @license: MIT
 *
 * @constructor  Unpaid vacation time
 *
 * @return {Object} Various methods that return gross salary and salary after taxes in different formats.
 */
function SalaryCalculator ({ rate, overtime, vacationDays }) {
    this.rate = rate
    this.overtime = overtime
    this.vacationDays = vacationDays

    /**
     * Round two decimal places.
     * @param float
     * @returns {number}
     */
    roundTwoPlaces = float => Math.round(float * 100) / 100

    /**
     * Format numbers into Cash strings.
     * @param num
     * @returns {*|string}
     */
    formatCash = num => {
        if (num < 1e3) return num // 1e3 = 10^3 = 1000
        if (num >= 1e3) return +(num /1e3).toFixed(1) + 'K'
    }

    return {
        gross: '$' + this.calcTotalSalary().toLocaleString('en-US'),
        grossShortened: formatCash(this.calcTotalSalary()),
        afterTaxes: '$' + this.calcSalaryAfterCaTaxes().toLocaleString('en-US'),
        afterTaxesShortened: formatCash(this.calcSalaryAfterCaTaxes())
    }
}

/**
 * calculateSalary()
 *
 * Calculate our yearly salary.
 */
SalaryCalculator.prototype.calcSalary = function() {
    return roundTwoPlaces(this.rate * TOTAL_WORK_HOURS)
}

/**
 * calculateOvertimePay()
 *
 * Calculate the total amount paid for overtime.
 */
SalaryCalculator.prototype.calcOvertimePay = function() {
    return roundTwoPlaces((this.rate * this.overtime) * 1.5)
}

/**
 * calculateLostVacationPay()
 *
 * Calculate the amount of pay lost for vacation days.
 */
SalaryCalculator.prototype.calcLostVacationPay = function() {
    const vacationHours = this.vacationDays * WORK_HOURS
    const lostVacationPay = this.rate * vacationHours
    return roundTwoPlaces(lostVacationPay)
}

/**
 * calculateTotalSalary()
 *
 * Calculate the total salary minus unpaid vacation time.
 */
SalaryCalculator.prototype.calcTotalSalary = function() {
    const salary = this.calcSalary()
    const overtime = this.calcOvertimePay()
    const lostVacationPay = this.calcLostVacationPay()

    return (salary + overtime) - lostVacationPay
}

/**
 * calcSalaryAfterTaxes()
 *
 * Calculate total salary after CA taxes.
 */
SalaryCalculator.prototype.calcSalaryAfterCaTaxes = function() {
    const caTaxPercent = CA_STATE_TAXES + CA_STATE_INS_TAXES
    const calcTaxesRemoved = this.calcTotalSalary() * caTaxPercent

    return roundTwoPlaces(this.calcTotalSalary() - calcTaxesRemoved)
}
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport"
	content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>VC Salary Calculator</title>
	</head>
	<body>
	<h1>VC Salary Calculator</h1>
	<script src="SalaryCalculator.js"></script>
	<script>
	// Example
	const yearlySalary = new SalaryCalculator({
	rate: 15.50,
	overtime: 5,
	vacationDays: 10
	})

	console.log('Gross Salary: ' + yearlySalary.gross)
	console.log('Gross Salary (Short): ' + yearlySalary.grossShortened)
	console.log('Take Home Pay: ' + yearlySalary.afterTaxes)
	console.log('Take Home Pay (Short): ' + yearlySalary.afterTaxesShortened)
	</script>
	</body>
	</html>
	// Constants
	const WORK_HOURS = 8
	const TOTAL_WORK_HOURS = 2088
	//const TOTAL_WORK_DAYS = 261
	//const TOTAL_WORK_WEEKS = 48

	const CA_STATE_TAXES = 25.6 / 100
	const CA_STATE_INS_TAXES = 8.56 / 100

	/**
	* SalaryCalculator()
	*
	* Calculate total yearly salary by taking the hourly rate,
	* overtime/holiday hours worked, and subtracting the sum
	* by vacation days taken. CA Taxes are deducted from this
	* total to represent "take home" pay before federal taxes.
	*
	* @author: Vanessa Coles (VMC Design)
	* @license: MIT
	*
	* @constructor Unpaid vacation time
	*
	* @return {Object} Various methods that return gross salary and salary after taxes in different formats.
	*/
	function SalaryCalculator ({ rate, overtime, vacationDays }) {
	this.rate = rate
	this.overtime = overtime
	this.vacationDays = vacationDays

	/**
	* Round two decimal places.
	* @param float
	* @returns {number}
	*/
	roundTwoPlaces = float => Math.round(float * 100) / 100

	/**
	* Format numbers into Cash strings.
	* @param num
	* @returns {*\|string}
	*/
	formatCash = num => {
	if (num < 1e3) return num // 1e3 = 10^3 = 1000
	if (num >= 1e3) return +(num /1e3).toFixed(1) + 'K'
	}

	return {
	gross: '$' + this.calcTotalSalary().toLocaleString('en-US'),
	grossShortened: formatCash(this.calcTotalSalary()),
	afterTaxes: '$' + this.calcSalaryAfterCaTaxes().toLocaleString('en-US'),
	afterTaxesShortened: formatCash(this.calcSalaryAfterCaTaxes())
	}
	}

	/**
	* calculateSalary()
	*
	* Calculate our yearly salary.
	*/
	SalaryCalculator.prototype.calcSalary = function() {
	return roundTwoPlaces(this.rate * TOTAL_WORK_HOURS)
	}

	/**
	* calculateOvertimePay()
	*
	* Calculate the total amount paid for overtime.
	*/
	SalaryCalculator.prototype.calcOvertimePay = function() {
	return roundTwoPlaces((this.rate * this.overtime) * 1.5)
	}

	/**
	* calculateLostVacationPay()
	*
	* Calculate the amount of pay lost for vacation days.
	*/
	SalaryCalculator.prototype.calcLostVacationPay = function() {
	const vacationHours = this.vacationDays * WORK_HOURS
	const lostVacationPay = this.rate * vacationHours
	return roundTwoPlaces(lostVacationPay)
	}

	/**
	* calculateTotalSalary()
	*
	* Calculate the total salary minus unpaid vacation time.
	*/
	SalaryCalculator.prototype.calcTotalSalary = function() {
	const salary = this.calcSalary()
	const overtime = this.calcOvertimePay()
	const lostVacationPay = this.calcLostVacationPay()

	return (salary + overtime) - lostVacationPay
	}

	/**
	* calcSalaryAfterTaxes()
	*
	* Calculate total salary after CA taxes.
	*/
	SalaryCalculator.prototype.calcSalaryAfterCaTaxes = function() {
	const caTaxPercent = CA_STATE_TAXES + CA_STATE_INS_TAXES
	const calcTaxesRemoved = this.calcTotalSalary() * caTaxPercent

	return roundTwoPlaces(this.calcTotalSalary() - calcTaxesRemoved)
	}