Implementing custom `isFalsy()`

#javascript #webdev #codenewbie #beginners

const isFalsy = (value) => {
  const isUndefined = value === undefined;
  const isNull = value === null;
  const isEmptyString = typeof value === "string" && !value.trim();
  const isEmptyArray =
    typeof value === "object" && Array.isArray(value) && 
        value.length === 0;
  const isEmptyObject =
    typeof value === "object" &&
    !Array.isArray(value) &&
    Object.keys(value).length === 0;

  return (
    isUndefined || isNull || isEmptyString || 
    isEmptyArray || isEmptyObject
  );
};