Async sleep function with unit parameters for JavaScript.

asyncSleep.js

const sleep = async (time, unit) => {
  switch(unit){
    case 'ms':
      return new Promise(resolve => setTimeout(resolve, time));
      break;

    case 's':
      return new Promise(resolve => setTimeout(resolve, time*1000));
      break;

    case 'm':
      return new Promise(resolve => setTimeout(resolve, time*60000));
      break;
      
    case 'h':
      return new Promise(resolve => setTimeout(resolve, time*3600000));
      break;

    default:
      throw new Error(`Sleep unit measure not recognized.\nSupported: ms, s, m, h.\nGiven: ${unit}`);
      break;
  }
}