How does nodejs interpret key value pairs when no semi color exists and the key itself is a string called with a function?

I was just going throw some of the test code in hexo-cli and came across the below lines of code ( full code and repo can be found here ):

const hexo = proxyquire('../../dist/hexo', {
  './console'(ctx) {
    ctx.extend.console.register('help', spy);
  }
});

I have read articles online stating that the module can be proxied using proxyquiry ( proxyquery ) and then key-values can be passed to imitate the methods in these modules like below for example:

var calculateDiscounts = proxyquire(‘./somemodule’, {
  ‘*/cartridge/scripts/hooks/cart/calculateHelpers’: {
    removeAllPriceAdjustments: removeAllPriceAdjustmentsStub
  },
  ‘dw/campaign/PromotionMgr’: {
    getPromotion: getPromotionStub,
    getDiscounts: getDiscountsStub,
    applyDiscounts: applyDiscountsStub
  }
});

( original article with above snippet )

So how does the below line of code execute? Why no errors are thrown, since it doesn't seem like a valid object at all?

'./console'(ctx) {
   ctx.extend.console.register('help', spy);
}

Solution

This is the same as

'./console': function(ctx) {
   ctx.extend.console.register('help', spy);
}

See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer?retiredLocale=pl#method_definitions or https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Method_definitions

Works fine in the broswer:

const a = {
  './console'(num) {
    return num * 5
  }
}

console.log(a['./console'](2))