It feelds good to reinvent the wheel
Install with component:
$ component install bredele/promise
Install with nodejs:
$ npm install component-promise
Register callbacks to receive either a promise’s eventual value or the reason why the promise cannot be fulfilled .
then arguments are optionals
Resolve/Fulfill promise with optional value.
Reject promise with optional reason.
Promise state is
pending by default and may transition to either the
A promise which is
rejected can not transition to another state.
promise is part of a collection of asynchronous patterns based on emitter:
The MIT License (MIT)
Copyright (c) 2014
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.