The 2 parts of this if/else statement work separately but not when put together. Any ideas on how to make it work? I want the user to click a button that allows them to not enter the website and if they came from a different page it will take them there, otherwise if they didn't come from a different page it will take them to Udemy. Thx

function goBack (){
    if (window.history.go(-1)){
      window.history.go(-1)
    }
     else {
      
      window.location.href="https://www.udemy.com/"
    }
    
  }