Use Arrows functions

Use arrow functions instead of function for cleaner and concise code:

// Function expression

const multiply = (a, b) => a * b;

// Implicit return

const square = x => x * x;

Arrow functions, also known as “fat arrow” functions, are a shorthand way to declare anonymous functions in JavaScript. They were introduced in ECMAScript 6 (ES6) and are a more concise and less verbose alternative to regular function expressions.

Here’s an example of a regular function expression:

const sum = function(a, b) {

  return a + b;

};

console.log(sum(1, 2)); // 3

And here’s the equivalent arrow function:

const sum = (a, b) => {

  return a + b;

};

console.log(sum(1, 2)); // 3

Arrow functions have several advantages over regular function expressions:

Shorter syntax: Arrow functions are shorter and more concise, making your code easier to read and write.

Implicit return: If an arrow function only has one expression, the value of that expression is returned automatically. You can omit the return keyword and the curly braces.

const sum = (a, b) => a + b;

console.log(sum(1, 2)); // 3

Lexical this: Arrow functions have a lexical this binding, meaning that this refers to the surrounding scope and is not affected by the context in which the function is executed.

const person = {

  name: ‘John Doe’,

  greet: function() {

    setTimeout(function() {

      console.log(`Hello, my name is ${this.name}`);

    }, 1000);

  }

};

person.greet(); // Hello, my name is undefined

With arrow functions, this refers to the outer person object and the code works as expected:

const person = {

  name: ‘John Doe’,

  greet: function() {

    setTimeout(() => {

      console.log(`Hello, my name is ${this.name}`);

    }, 1000);

  }

};

person.greet(); // Hello, my name is John Doe

In conclusion, arrow functions are a powerful and convenient feature in JavaScript that allow you to write more concise, expressive, and predictable code.