An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically binds the this value (does not bind its own this, arguments, super, or new.target). Arrow functions are always anonymous.

// Basic syntax:
(param1, param2, paramN) =>{ statements }
(param1, param2, paramN) =>expression
// equivalent to:  =>{ return expression; }

// Parentheses are optional when there's only one argument:
(singleParam) =>{ statements }
singleParam => { statements }

// A function with no arguments requires parentheses:
() =>{ statements }

// Advanced:
// Parenthesize the body to return an object literal expression:
params => ({foo: bar})

// Rest parameters are supported
(param1, param2, ...rest) =>{ statements }