Object literals as an alternative to if else and switch: https://betterprogramming.pub/dont-use-if-else-and-switch-in-javascript-use-object-literals-c54578566ba0

script.js

//https://gist.github.com/jogilvyt/22f1628d4c2853df1113f8e28096fde0

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";
}


//https://gist.github.com/jogilvyt/6490ace2eb90c096b1f90992c3ac2623#file-rhyming-slang-two-js

function getTranslation(rhyme) {
  switch (rhyme.toLowerCase()) {
    case "apples and pears":
      return "Stairs";
    case "hampstead heath":
      return "Teeth";
    case "loaf of bread":
      return "Head";
    case "pork pies":
      return "Lies";
    case "whistle and flute":
      return "Suit";
    default:
      return "Rhyme not found";
  }
}



//https://gist.github.com/jogilvyt/eb1daabea713bd04d5d5d7b893608182#file-rhyming-slang-one-js

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";
}

//pass a function as the value to your object keys and execute the response

function calculate(num1, num2, action) {
  const actions = {
    add: (a, b) => a + b,
    subtract: (a, b) => a - b,
    multiply: (a, b) => a * b,
    divide: (a, b) => a / b,
  };

  return actions[action]?.(num1, num2) ?? "Calculation is not recognised";
}

//use optional chaining (the ?. in the last line of code) to only execute the response if it is defined. Otherwise, fall through to the default return string.