[Javascript] How to create a function whose name is from a variable.

variable-named-function.js

function factory (name, fn) {
  const scope = {
    // wrapper
    [name] (...args) {
      return fn(...args)
    }
  }
  return scope[name]
}

const fn = factory('test', (...args) => console.log('This is a test(%s)', args.map(JSON.stringify).join(', ')))

console.log(fn)
// [Function: test]

fn(1, [ 2, 3 ], { test: true, nested: { text: 'yes' } })
// This is a test(1, [2,3], {"test":true,"nested":{"text":"yes"}})

To create a function whose name is from a variable, the trick is to make use of both the shorthand method name and the computed property name defined in ES6.

See Object Initializer (MDN Page) if you are not familiar with it.