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JavaScript, how to export multiple functions

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How to export multiple functions from a JavaScript file

In JavaScript we can separate a program into separate files. How do we make the functions we define in a file available to other files?

You typically write a few functions, like this:

function sum(a, b) {
  return a + b

function mul(a, b) {
  return a * b

and you can make them available for any other file using this syntax:

export { sum, mul }

The files that need the functionality exported will import all the functions, or just the ones they need:

import { sum, mul } from 'myfile'
import { mul } from 'myfile'
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