getpreviousdate.js

function getPreviousdate(date){
  const [day,month,year] = date.split('-');
  
  const today = new Date(year,month - 1,day)
  
  const milliseconds = today.getTime() - 86400000

  const d2 = new Date(milliseconds);
  
  const Previousdate = d2.toLocaleDateString(['ban', 'id'])
  .replace(/[\/]/g,'-');
//replaces '/' with '-' , comment above line if you want the regular date format
  console.log(Previousdate)
  return Previousdate
}
// Accepts day-month-year / returns the same format
getPreviousdate('01-01-2021') 

Tell me what you think and let me know if you know other methods!