20+ Handy JavaScript Functions to Simplify Your Code | JavaScript Tutorial

JavaScript is a functional programming language, and functions play a crucial role. They allow you to encapsulate reusable code and perform specific tasks. Here are some quick examples of functions that can make your life easier:

Regular function

function sum(a, b) {
  return a + b;
}

Function expression

const sum = function (a, b) {
  return a + b;
};

Arrow function

const sum = (a, b) => {
  return a + b;
};
// OR
const sum = (a, b) => a + b;

Generator function

function* indexGenerator() {
  let index = 0;
  while (true) {
    yield index++;
  }
}
const g = indexGenerator();
console.log(g.next().value); // => 0
console.log(g.next().value); // => 1

Create an array of numbers from 1 to n

const range = (n) => Array.from({ length: n }, (_, i) => i + 1)…