Elegant throw error on missing argument

throwOnMissingArgument.js

// From https://davidwalsh.name/javascript-tricks
/**
Those three dots made the task so much easier!

Require Function Parameters
Being able to set default values for function arguments was an awesome addition to JavaScript, but check out this trick for requiring values be passed for a given argument:
*/

const isRequired = () => { throw new Error('param is required'); };

const hello = (name = isRequired()) => { console.log(`hello ${name}`) };

// This will throw an error because no name is provided
hello();

// This will also throw an error
hello(undefined);

// These are good!
hello(null);
hello('David');