If statement to Object Literal in Javascript

In a class I have a function condition() with an if statement that calls other functions and I'm trying to convert to Object Literal. It would be possible?

LOW_HUMIDITY = 20;
HIGH_TEMP = 40;
LOW_TEMP = 5;

class Country {
  constructor(temperature, humidity) {
    this.temperature = temperature;
    this.humidity = humidity;
  }
  condition() {
    if (this.humidity < LOW_HUMIDITY) {
      return new fooFunction1();
    }
    if (this.temperature > HIGH_TEMP) {
      return new fooFunction2();
    }
    if (
      (this.temperature > LOW_TEMP) &
      (this.temperature < HIGH_TEMP) &
      (this.humidity > LOW_HUMIDITY)
    ) {
      return new fooFunction3();
    }
    if (this.temperature < LOW_TEMP) {
      return new fooFunction4();
    }

    return new fooFunction5();
  }
}

I managed to get the same behavior by switching to switch case, but I couldn't pass Object Literal.

condition() {
switch (true) {
      case this.humidity < LOW_HUMIDITY:
        return new fooFunction1();
      case this.temp > HIGH_TEMP:
        return new new fooFunction2();
      case this.temp < LOW_TEMP:
        return new fooFunction3();
      case (this.temp > LOW_TEMP):
      case (this.temp < HIGH_TEMP):
      case (this.humidity > LOW_HUMIDITY):
        return new fooFunction4();
      default:
        fooFunction5();
    }
  } 

Because the examples I found about this conversion use if else and receive a parameter for comparison. Example:

function getTranslation(rhyme) {
  if (rhyme.toLowerCase() === "apples and pears") {
    return "Stairs";
  } else if (rhyme.toLowerCase() === "hampstead heath") {
    return "Teeth";
  } else if (rhyme.toLowerCase() === "loaf of bread") {
    return "Head";
  } else if (rhyme.toLowerCase() === "pork pies") {
    return "Lies";
  } else if (rhyme.toLowerCase() === "whistle and flute") {
    return "Suit";
  }

  return "Rhyme not found";
}

It's converted to Object Literal which didn't make me clear how I can use it in my condition function:

function getTranslationMap(rhyme) {
  const rhymes = {
    "apples and pears": "Stairs",
    "hampstead heath": "Teeth",
    "loaf of bread": "Head",
    "pork pies": "Lies",
    "whistle and flute": "Suit",
  };
  
  return rhymes[rhyme.toLowerCase()] ?? "Rhyme not found";
}