helpers.js

export function calculateSign(birthMonth, birthDay) {
    if (birthMonth == null || birthDay == null) return 'Please enter a month and day!';


   if ((birthMonth == 1 && birthDay <= 19) || (birthMonth == 12 && birthDay >= 22)) {
       return 'Capricorn';
   } else if ((birthMonth == 1 && birthDay >= 20) || (birthMonth == 2 && birthDay <= 18)) {
       return 'Aquarius';
   } else if ((birthMonth == 2 && birthDay >= 19) || (birthMonth == 3 && birthDay <= 20)) {
       return 'Pisces';
   } else if ((birthMonth == 3 && birthDay >= 21) || (birthMonth == 4 && birthDay <= 19)) {
       return 'Aries';
   } else if ((birthMonth == 4 && birthDay >= 20) || (birthMonth == 5 && birthDay <= 20)) {
       return 'Taurus';
   } else if ((birthMonth == 5 && birthDay >= 21) || (birthMonth == 6 && birthDay <= 20)) {
       return 'Gemini';
   } else if ((birthMonth == 6 && birthDay >= 21) || (birthMonth == 7 && birthDay <= 22)) {
       return 'Cancer';
   } else if ((birthMonth == 7 && birthDay >= 23) || (birthMonth == 8 && birthDay <= 22)) {
       return 'Leo';
   } else if ((birthMonth == 8 && birthDay >= 23) || (birthMonth == 9 && birthDay <= 22)) {
       return 'Virgo';
   } else if ((birthMonth == 9 && birthDay >= 23) || (birthMonth == 10 && birthDay <= 22)) {
       return 'Libra';
   } else if ((birthMonth == 10 && birthDay >= 23) || (birthMonth == 11 && birthDay <= 21)) {
       return 'Scorpio';
   } else if ((birthMonth == 11 && birthDay >= 22) || (birthMonth == 12 && birthDay <= 21)) {
       return 'Sagittarius';
   } else {
       return 'Invalid date!';
   }
}