7 Shorthand Optimization Tricks every JavaScript Developer Should Know 😎

Every language has its own quirks and JavaScript, the most used programming language, is no exception. This article will cover a plethora of JavaScript Shorthand Optimization tricks that can help you write better code, and also make sure this is NOT your reaction when you encounter them:

1. Multiple string checks

Often you might need to check if a string is equal to one of the multiple values, and can become tiring extremely quickly. Luckily, JavaScript has a built-in method to help you with this.

// Long-hand
const isVowel = (letter) => {
  if (
    letter === "a" ||
    letter === "e" ||
    letter === "i" ||
    letter === "o" ||
    letter === "u"
  ) {
    return true;
  }
  return false;
};
// Short-hand
const isVowel = (letter) =>
  ["a", "e", "i", "o", "u"].includes(letter);

2. For-of and For-in loops

For-of and For-in loops are a great way to iterate over an array or object without having to manually keep track of the index of the keys of the object.