The describe-property from mjackson

describe-property's Introduction

describe-property is a property descriptor library that runs in both node.js and the browser. You use it to quickly generate property descriptors to use with Object.create, Object.defineProperty, and/or Object.defineProperties.

Example

var d = require('describe-property');

function Person(firstName, surname) {
  this.firstName = firstName;
  this.surname = surname;
}

Object.defineProperties(Person.prototype, {

  // Methods can be passed directly.
  sayHi: d(function () {
    console.log('Hello, my name is', this.fullName);
  }),

  // Getters are defined using d.gs.
  fullName: d.gs(function () {
    return this.firstName + ' ' + this.surname;
  }),

  // Setters are defined as the second argument to d.gs.
  firstName: d.gs(function () {
    return this._firstName;
  }, function (value) {
    this._firstName = value.trim();
  })

});

By default property descriptors use ES5 attributes.

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

But any of these can be overridden using an object literal.

d({
  enumerable: true,
  value: function () {
    // ...
  }
}); // => { configurable: true, enumerable: true, writable: true, value: function () {} }

Installation

Using npm:

$ npm install describe-property

Issues

Please file issues on the issue tracker on GitHub.

Tests

To run the tests in node:

$ npm install
$ npm test

Credits

This library was inspired by @medikoo's excellent d library. It is intended to be a lighter-weight alternative with fewer features, but also only a single dependency.