numeric-validation/index.js

This package validates number based upon provided rules

function validateNumber (number, rules) {
    let flag = false;
    const { greaterThan, equalTo, lesserThan, isInteger, isFloat, isNumber } = rules;

    if(typeof number !== number) {
        number = +number;
    }

    if(isNaN(number)) {
        return false;
    }

    if(!isNaN(number) && typeof isNumber === "boolean") {
        return true;
    }

    if (typeof greaterThan === "number") {
        flag = !!(number > greaterThan);
    }
    
    if (typeof equalTo === "number") {
        flag = !!(number === equalTo);
    }

    if (typeof lesserThan === "number") {
        flag = !!(number < lesserThan);
    }

    if(typeof isInteger === "boolean") {
        flag = !!(Number.isInteger(number));
    }

    if(typeof isFloat === "boolean") {
        flag = !!(Number.isInteger(number)) ? false : true;
    }

    return flag;
}

module.exports = validateNumber;