Arrow Functions

Arrow functions, also called “fat arrows” were introduced with ES6 as a new syntax for writing Javascript functions.

By utilising a token (=>) that looks like a fat arrow, they are a more concise and elegant way of writing function expressions.

Basic Syntax

//ES5 Way
function myFunc() {
//statements here ...
}

//ES6 Way
myFunc = () => {
//statements here ...
}

Parentheses in ES6 functions are optional when only one parameter is passed.

myFunc = val => {
return val += 1;
}
alert(myFunc(2)); //3

But if no parameters are passed to the function, then parentheses are required.