Javascript file about mathmatics(Not Using ES6 for compatability with less than IE8. But want to using ES6 whenever..(If i resolve compatability problem using polyfill))

math.js

var math = {
    /**
     * Return divided values
     * @date 2017.05.18
     * @author tshyeon
     * @param {number} dividend
     * @param {number} divisor
     * @return {number} result
     * @example math.divider(150, 10) // {quotient: 15, remainder: 0, value: 15.0}
     */
    divider: function(dividend, divisor) {
        var defaultValue = 0;
        var dividedType = typeof dividend;
        var divisorType = typeof divisor;
        
        // Arguments Check
        if ( dividedType === "undefined" ) {
            console.error("[TS_Error] math.dividend : Invalid dividedType is " + dividedType);
            return defaultValue;
        }
        else if ( isNaN(dividend) ) {
            console.error("[TS_Error] math.dividend : Invalid NaN dividend");
            return defaultValue;
        }
        if ( divisor === 0 ) {
            console.error("[TS_Error] math.divisor : Invalid divisor is " + divisor);
            return defaultValue;
        }
        // Type Check
        if ( dividedType !== "number" ) {
            console.error("[TS_Error] math.divider : Invalid divident type '" + dividedType + "'");
            return defaultValue;
        }
        if ( divisorType !== "number" ) {
            console.error("[TS_Error] math.divider : Invalid divisor type '" + divisorType + "'");
            return defaultValue;
        }
        // Progress
        return dividend / divisor;
        // Deprecated..
        /**
         * @typedef {Object} result - Result Object
         * @property {number} quotient
         * @property {number} remainder
         * @property {string} value - String value of combined quotient and remainder 
         */
        // var quotient;
        // var remainder;
        // var result = {};
        // quotient = dividend / divisor;
        // remainder = dividend % divisor;
        // if (remainder === 0) remainder = 0; // for check -0
        // result.quotient = quotient;
        // result.remainder = remainder;

        // if ( quotient.toString().indexOf('.') === -1 ) {
        //     result.value = quotient;
        // }
        // else if ( quotient === 0 && remainder === 0 ) {
        //     result.value = 0;
        // }
        // else {
        //     result.value = quotient + '.' + remainder;
        // }
        // return result;
    },
};