React

Question 1

Arrow function

Answer 1

Basic function:
const add = (a, b) => a + b;

With block body:
const multiply = (a, b) => {
return a * b;
};

Anonymous (inline):
[1, 2, 3].map(n => n * 2);

Question 2

Exports

Answer 2

default (unnamed):
export default …;

named:
export const someData = …;

Question 3

Imports

Answer 3

Default (unnamed):
import upToYou from ‘./path/file.js’

Named:
import {someData} from ‘./path/file.js’

All named:
import * as upToYou from ‘./path/file.js’