forked from zhurui/management
48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
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# prr [](http://travis-ci.org/rvagg/prr)
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An sensible alternative to `Object.defineProperty()`. Available in npm and Ender as **prr**.
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## Usage
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Set the property `'foo'` (`obj.foo`) to have the value `'bar'` with default options (`'enumerable'`, `'configurable'` and `'writable'` are all `false`):
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```js
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prr(obj, 'foo', 'bar')
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```
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Adjust the default options:
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```js
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prr(obj, 'foo', 'bar', { enumerable: true, writable: true })
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```
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Do the same operation for multiple properties:
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```js
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prr(obj, { one: 'one', two: 'two' })
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// or with options:
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prr(obj, { one: 'one', two: 'two' }, { enumerable: true, writable: true })
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```
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### Simplify!
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But obviously, having to write out the full options object makes it nearly as bad as the original `Object.defineProperty()` so we can simplify.
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As an alternative method we can use an options string where each character represents a option: `'e'=='enumerable'`, `'c'=='configurable'` and `'w'=='writable'`:
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```js
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prr(obj, 'foo', 'bar', 'ew') // enumerable and writable but not configurable
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// muliple properties:
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prr(obj, { one: 'one', two: 'two' }, 'ewc') // configurable too
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```
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## Where can I use it?
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Anywhere! For pre-ES5 environments *prr* will simply fall-back to an `object[property] = value` so you can get close to what you want.
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*prr* is Ender-compatible so you can include it in your Ender build and `$.prr(...)` or `var prr = require('prr'); prr(...)`.
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## Licence
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prr is Copyright (c) 2013 Rod Vagg [@rvagg](https://twitter.com/rvagg) and licensed under the MIT licence. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE.md file for more details.
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