isEmpty and isFinite functions

isEmpty.js

function isEmpty(value){
  return  value === undefined ||
    value === null ||
    (typeof value === "object" && Object.keys(value).length === 0) ||
    (typeof value === "string" && value.trim().length === 0)
}

module.exports = isEmpty;

isFinite.js

function isFinite(value) {
  return typeof value == 'number' && (isNaN(value) ||
    value == Number.POSITIVE_INFINITY ||
    value == Number.NEGATIVE_INFINITY);
}

module.exports = isFinite;