functions

Question 1

what type of statement is this

var awesomeFunction = function(coolThings) { // .. return amazingStuff; };

Answer 1

anonymous function expression

no identifier betwen function and (). gets an inferred name from assignment.

This function is an expression that is assigned to the variable awesomeFunction. Different from the function declaration form, a function expression is not associated with its identifier until that statement during runtime.

Question 2

what type of statement is this

function awesomeFunction(coolThings) {
 // .. return amazingStuff;
}

Answer 2

function declaration

This is called a function declaration because it appears as a statement by itself, not as an expression in another statement. The association between the identifier awesomeFunction and the function value happens during the compile phase of the code, before that code is executed.

Question 3

what type of statement is this

var awesomeFunction = function someName(coolThings) {
// .. return amazingStuff; };

awesomeFunction.name;

Answer 3

named function expression

// “someName”

someName is directly associated with the function expression at compile time

Question 4

what type of statement is this

*two() { .. }

Answer 4

generator function declaration function

Question 5

what type of statement is this

async function three() { .. }

Answer 5

async function declaration

Question 6

what type of statement is this

async function *four() { .. }

Answer 6

async generator function declaration

Question 7

what type of statement is this

export function five() { .. }

Answer 7

named function export declaration (ES6 modules)

Question 8

what type of statement is this

(function(){ .. })();

Answer 8

immediately invoked function expresion

Question 9

what type of statement is this

(async function(){ .. })();

Answer 9

async immediately invoked function expresion

Question 10

what type of statement is this

(async function myname(){ .. })();

Answer 10

named async immediately invoked function expresion

Question 11

what type of statement is this

(function myname(){ .. })();

Answer 11

named immediately invoked function expresion

Question 12

what type of statement is this

const f = () => 42;

Answer 12

arrow function

Question 13

what type of statement is this

const f = async () => 42;

Answer 13

async arrow function

Question 14

what type of statement is this

const obj = {
 oldSchool: function() { .. }
}

Answer 14

(anonymous) function expression property

Question 15

what type of statement is this

const obj = {
 boringMethod() { .. },
}

Answer 15

object method