Convert sample

convert-fe.js

function Convert(number, fromUnit) {
    console.log('Starting....');
    var conversions = {
        distance: {
            meters: 1,
            cm: 0.01,
            feet: 0.3048,
            inches: 0.0254,
            yards: 0.9144
        },
        volume: {
            liters: 1,
            gallons: 3.785411784,
            cups: 0.236588236
        },
        mass: {
            kilogram: 1,
            metricton: 0.001,
            stone: 0.15747,
            pound: 2.2046,
            ounce: 35.274
        }
    },
        betweenUnit = false,
        type, unit;

    console.log('Starting looping conversions....');
    for (type in conversions) {

        if (conversions[type]) {

            if ((unit = conversions[type][fromUnit])) {
                console.log('in side - for -Found unit');
                betweenUnit = number * unit * 1000;
                console.log(betweenUnit);
            }
        }
    }

    var convertTo = function (toUnit) {
        console.log('function is called convertTo....'); // will be only hit when it call to()
        if (betweenUnit) {
            for (type in conversions) {
                if (conversions.hasOwnProperty(type)) {
                    if ((unit = conversions[type][toUnit])) {
                        return fix(betweenUnit / (unit * 1000));
                    }
                }
            }
            throw new Error("unrecognized to-unit");
        } else {
            throw new Error("unrecognized from-unit");
        }

        function fix(num) {
            console.log('fix innerfunction called....'); // only hit from convertTo()
            return parseFloat(num.toFixed(2));
        }

        console.log('End of conver to'); //do not coming here since it was return in top in convertTo()
    };
    console.log('End...'); // will be hit as end point of the Convert
    return {
        to: convertTo
    };

    console.log('End after retrun'); // never hit here sine it after return
}

convert.js

function Convert(number, fromUnit) {
    //Starting convert
    var conversions = {
        distance: {
            meters: 1,
            cm: 0.01,
            feet: 0.3048,
            inches: 0.0254,
            yards: 0.9144
        },
        volume: {
            liters: 1,
            gallons: 3.785411784,
            cups: 0.236588236
        },
        mass: {
            kilogram: 1,
            metricton: 0.001,
            stone: 0.15747,
            pound: 2.2046,
            ounce: 35.274
        }
    },
        betweenUnit = false,
        type, unit;

    //Starting looping conversions
    for (type in conversions) {
        if (conversions[type]) {
            if ((unit = conversions[type][fromUnit])) {
                //unit found some math logic for converstion using above json
                betweenUnit = number * unit * 1000;
            }
        }
    }

    var convertTo = function (toUnit) {
        // will be only hit when it call to()
        if (betweenUnit) {
            for (type in conversions) {
                if (conversions.hasOwnProperty(type)) {
                    if ((unit = conversions[type][toUnit])) {
                        return fix(betweenUnit / (unit * 1000));
                    }
                }
            }
            throw new Error("unrecognized to-unit");
        } else {
            throw new Error("unrecognized from-unit");
        }

        function fix(num) {
            // only hit from convertTo()
            return parseFloat(num.toFixed(2));
        }

        //do not coming here since it was return in top in convertTo()
    };
    // will be hit as end point of the Convert
    return {
        to: convertTo
    };

    // never hit here sine it after return
}