@ganuz/define-metadata

Define Metadata is package from Ganuz library

Install

$ yarn add @ganuz/define-metadata

Or

$ npm install --save @ganuz/define-metadata

Use

Module

import {
  default as defineMetadata
} from '@ganuz/define-metadata';

Browser

<script src="https://unpkg.com/@ganuz/define-metadata/bundle.umd.min.js"></script>

let {
  defineMetadata
} = G;

Examples

 defineMetadata('key', 'value', null, 'prop'); // throw TypeError
 defineMetadata('foo', 'bar', {}); // => void
 defineMetadata('key', 'value', class {}, 'prop'); // => void

 class A{}
 class B extends A{}

 defineMetadata('color', 'red', B);
 defineMetadata(Number, 45, A);
 getMetadata('color', A); // => undefined
 getMetadata('color', B); // => 'red'
 getMetadata(Number, A); // => 45
 getMetadata(Number, B); // => 45

 defineMetadata('color', 'green', A);
 defineMetadata(Number, 0x69, B);
 getMetadata('color', A); // => 'green'
 getMetadata('color', B); // => 'red'
 getMetadata(Number, A); // => 45
 getMetadata(Number, B); // => 105

Note: It is based on es6 WeakMap and Map no need for polyfill (built-in library support).

License

Copyright © Yisrael Eliev, Licensed under the MIT license.