weak-key

weak-key
===

Get a unique key for an object ( mainly for react's key={} )

[![NPM version][npm-image]][npm-url]
[![Build status][travis-image]][travis-url]
[![Test coverage][coveralls-image]][coveralls-url]
[![Downloads][downloads-image]][downloads-url]

$3

``bash
npm install --save weak-key
`

$3

`js
var key = require('weak-key');
const todos = [{ text: 'write module' }, { text: 'writes tests' }, { text: 'publish' }];
todos.map(key); // ['weak-key-0', 'weak-key-1', 'weak-key-2'];
todos.reverse().map(key); // ['weak-key-2', 'weak-key-1', 'weak-key-0'];
[{}, {}].map(key); // ['weak-key-3', 'weak-key-4'];
`

This only works on things that typeof thing === 'object' so you can't use it on primitive types (numbers, strings, ...)
which makes it great to use for React's key={}

$3

`js
import key from 'weak-key';
export default function Todo(items) {
return (


{
items.map(item =>

• {item.text}

)
}


);
}
``

[npm-image]: https://img.shields.io/npm/v/weak-key.svg?style=flat-square
[npm-url]: https://npmjs.org/package/weak-key
[travis-image]: https://img.shields.io/travis/kolodny/weak-key.svg?style=flat-square
[travis-url]: https://travis-ci.org/kolodny/weak-key
[coveralls-image]: https://img.shields.io/coveralls/kolodny/weak-key.svg?style=flat-square
[coveralls-url]: https://coveralls.io/r/kolodny/weak-key
[downloads-image]: http://img.shields.io/npm/dm/weak-key.svg?style=flat-square
[downloads-url]: https://npmjs.org/package/weak-key