@kingjs/property-descriptor.create-from-context v1.0.2

@kingjs/property-descriptor.create-from-context

Package a target, a name, and a descriptor created by a callback using name and target.

Usage

var assert = require('assert');
var createFromContext = require('@kingjs/property-descriptor.create-from-context');

function Type() { };
Type.info = x => x.toUpperCase();;

function init(name, target) {
  var ctor = target.constructor;
  return { value: () => ctor.info(name) };
}

var { target, name, descriptor } = createFromContext(Type.prototype, 'foo', init);
Object.defineProperty(target, name, descriptor);
var instance = new Type();
assert(instance.foo() == 'FOO');

API

createFromContext(target, name, callback(name, target))

Parameters

• target: The target on which the property is defined.
• name: The name of property being described.
• callback: Returns a a descriptor given name and target.
  • name: The name of property being described.
  • target: The target on which the property is defined.

Returns

An object with target, name, and descriptor properties where the descriptor is created by the callback using name and target.

Remarks

The implementation is trivial but the concept of a property being completely defined by a name plus metadata attached to the target is quite powerful. It allows a mini declarative DSL to be created and expressed as attributes attached to functions.

Install

With npm installed, run

$ npm install @kingjs/property-descriptor.create-from-context

Source

https://repository.kingjs.net/property-descriptor/create-from-context

License

MIT