chrisblackwell · November 21, 2016 13:31
diff --git a/required-params.js b/required-params.js
 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');
	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');