es6-arrow-functions

Question 1

What is the syntax for defining an arrow function?

Answer 1

let func = () => expression or {statement} with func being the name of the arrow function, expression being anything that returns a value and the statement being for functions that don’t need to return values

Question 2

When an arrow function’s body is left without curly braces, what changes in its functionality?

Answer 2

The expression that is showing is automatically returned, it functions the same as let func = () => {return expression} but it is shorthand: let func = () => expression

Question 3

How is the value of this determined within an arrow function?

Answer 3

The value of this is the value of this of the containing code block

Question 4

When is the value of this determined for arrow functions?

Answer 4

The value of this is determined at definition time since it looks out to the containing code block to get its this value