Examples

setTimeout

setTimeout(() => {
  console.log("This will echo after 2 seconds!")
}, 2000)

ES6

Best practices

Prefer arrow functions as callbacks

As callbacks, arrow functions have two advantages over traditional functions:

• this is lexical and therefore safer to use.
• Their syntax is more compact. That matters especially in functional programming, where there are many higher-order functions and methods (functions and methods whose parameters are functions).