hints.js

/**
 * When I click and start typing in either input,
 * update the other's input value with the converted temperature.
 *
 * HINTS: 1. 'keyup' event
 * 2. Use function keyword so that you can use 'this'
 */

temp-lib.js

const converters = {
  toCelsius(fahrenheit) {
    return ((fahrenheit - 32) * 5) / 9
  },

  toFahrenheit(celsius) {
    return (celsius * 9) / 5 + 32
  },
}

export default (temperature, conversion) => {
  const parsedTemp = parseFloat(temperature)
  if (Number.isNaN(parsedTemp)) {
    return "Not something we can convert! 😞"
  }

  return Math.round(converters[conversion](parsedTemp) * 1000) / 1000
}