JQUERY, AJAX if else statement

Question

Я пытаюсь создать простой чат-бот. Пока бот-ответ - это тип пользователя в заданном вопросе. Но как я могу сделать так, чтобы chatbot выдавал «извините, я не понимаю», если пользователь спрашивает то, что не определено?

function ai(message){ 
    if (username.length<3){ 
     username = message; 
     send_message("Nice to meet you " + username + ", how are you today?"); 
     responsiveVoice.speak("Nice to meet you " + username + ", how are you today?"); 
    } 

    if (message.toLowerCase().indexOf("how are you")>=0){ 
     send_message("Thanks, Iam good!"); 
     responsiveVoice.speak("Thanks, Iam good!"); 
    } 

    if (message.toLowerCase().indexOf("time")>=0){ 
     var date = new Date(); 
     var h = date.getHours(); 
     var m = date.getMinutes(); 
     send_message("Current time is "+h+":"+m); 
    } 

    if (message.toLowerCase().indexOf("thanks")>=0){ 
     send_message("You are welcome"); 
    } 

    if (message.toLowerCase().indexOf("Thank you")>=0){ 
     send_message("No Problem"); 
    } 

    if (message.toLowerCase().indexOf("thank you very much")>=0){ 
     send_message("Welcome Sir!");   
    } 
} 

Answer 1

else?

if (message.toLowerCase().indexOf("how are you")>=0){ 
    send_message("Thanks, Iam good!"); 
    responsiveVoice.speak("Thanks, Iam good!"); 
} else { 
    send_message("sorry I don't understand"); 
    responsiveVoice.speak("sorry I don't understand"); 
} 

Вы также можете использовать switch заявление:

switch (message.toLowerCase()) { 
    case "how are you": 
    send_message("Thanks, Iam good!"); 
    responsiveVoice.speak("Thanks, Iam good!"); 
    break; 
    case "something else": 
    send_message("something else"); 
    responsiveVoice.speak("something else"); 
    break; 
    default: 
    send_message("sorry I don't understand"); 
    responsiveVoice.speak("sorry I don't understand"); 
} 

Answer 2

ответ предоставленный Теему

function ai(message){ 
      if (username.length<3){ 
       username = message; 
       send_message("Nice to meet you " + username + ", how are you today?"); 
       responsiveVoice.speak("Nice to meet you " + username + ", how are you today?"); 
       return; 
      } 

      if (message.toLowerCase().indexOf("how are you")>=0){ 
       send_message("Thanks, Iam good!"); 
       responsiveVoice.speak("Thanks, Iam good!"); 
       return; 
      } 

      if (message.toLowerCase().indexOf("time")>=0){ 
       var date = new Date(); 
       var h = date.getHours(); 
       var m = date.getMinutes(); 
       send_message("Current time is "+h+":"+m); 
       return; 
      } 

      if (message.toLowerCase().indexOf("thanks")>=0){ 
       send_message("You are welcome"); 
       return; 
      } 

      if (message.toLowerCase().indexOf("Thank you")>=0){ 
       send_message("No Problem"); 
       return; 
      } 

      if (message.toLowerCase().indexOf("thank you very much")>=0){ 
       send_message("Welcome Sir!"); 
      } else { 
    send_message("sorry I don't understand"); 
    responsiveVoice.speak("sorry I don't understand"); 
}