d

Property descriptor factory

npm install d
3 downloads in the last day
11 downloads in the last week
38 downloads in the last month

D - Property descriptor factory

Originally derived from es5-ext package.

Defining properties with descriptors is very verbose:

var Account = function () {};
Object.defineProperties(Account.prototype, {
  deposit: { value: function () {
      /* ... */
    }, configurable: true, enumerable: false, writable: true },
  whithdraw: { value: function () {
      /* ... */
    }, configurable: true, enumerable: false, writable: true },
  balance: { get: function () {
      /* ... */
    }, configurable: true, enumerable: false }
});

D cuts that to:

var d = require('d');

var Account = function () {};
Object.defineProperties(Account.prototype, {
  deposit: d(function () {
    /* ... */
  }),
  whithdraw: d(function () {
    /* ... */
  }),
  balance: d.gs(function () {
    /* ... */
  })
});

By default, created descriptor follow characteristics of native ES5 properties, and defines values as:

{ configurable: true, enumerable: false, writable: true }

You can overwrite it by preceding value argument with instruction:

d('c', value); // { configurable: true, enumerable: false, writable: false }
d('ce', value); // { configurable: true, enumerable: true, writable: false }
d('e', value); // { configurable: false, enumerable: true, writable: false }

// Same way for get/set:
d.gs('e', value); // { configurable: false, enumerable: true }

Installation

NPM

In your project path:

$ npm install d

Browser

You can easily bundle D for browser with modules-webmake

Tests Build Status

$ npm test
npm loves you