disallow-new

This is a simple utility for disallowing the use of "new" with certain functions. It's especially useful for when you have a capitalized factory function that you don't want people to use as a constructor (which would cause an unnecessary object allocation but otherwise succeed without warning).

Installation

npm install disallow-new

Usage

import disallowNew from 'disallow-new';
 
function MyFactory() {
  // [SNIP]
}
 
export default disallowNew(MyFactory);

Elsewhere:

let a = new MyFactory(); // Errors!

let a = MyFactory(); // All good.