mirror of https://github.com/jkjoy/sunpeiwen.git
107 lines
2.8 KiB
Markdown
107 lines
2.8 KiB
Markdown
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# MZ - Modernize node.js
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[![NPM version][npm-image]][npm-url]
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[![Build status][travis-image]][travis-url]
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[![Test coverage][coveralls-image]][coveralls-url]
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[![Dependency Status][david-image]][david-url]
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[![License][license-image]][license-url]
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[![Downloads][downloads-image]][downloads-url]
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Modernize node.js to current ECMAScript specifications!
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node.js will not update their API to ES6+ [for a while](https://github.com/joyent/node/issues/7549).
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This library is a wrapper for various aspects of node.js' API.
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## Installation and Usage
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Set `mz` as a dependency and install it.
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```bash
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npm i mz
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```
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Then prefix the relevant `require()`s with `mz/`:
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```js
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var fs = require('mz/fs')
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fs.exists(__filename).then(function (exists) {
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if (exists) // do something
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})
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```
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With ES2017, this will allow you to use async functions cleanly with node's core API:
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```js
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const fs = require('mz/fs')
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async function doSomething () {
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if (await fs.exists(__filename)) // do something
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}
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```
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## Promisification
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Many node methods are converted into promises.
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Any properties that are deprecated or aren't asynchronous will simply be proxied.
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The modules wrapped are:
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- `child_process`
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- `crypto`
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- `dns`
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- `fs` (uses `graceful-fs` if available)
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- `readline`
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- `zlib`
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```js
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var exec = require('mz/child_process').exec
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exec('node --version').then(function (stdout) {
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console.log(stdout)
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})
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```
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## Promise Engine
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`mz` uses [`any-promise`](https://github.com/kevinbeaty/any-promise).
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## FAQ
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### Can I use this in production?
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Yes, Node 4.x ships with stable promises support. For older engines,
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you should probably install your own promise implementation and register it with
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`require('any-promise/register')('bluebird')`.
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### Will this make my app faster?
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Nope, probably slower actually.
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### Can I add more features?
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Sure.
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Open an issue.
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Currently, the plans are to eventually support:
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- New APIs in node.js that are not available in older versions of node
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- ECMAScript7 Streams
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[bluebird]: https://github.com/petkaantonov/bluebird
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[npm-image]: https://img.shields.io/npm/v/mz.svg?style=flat-square
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[npm-url]: https://npmjs.org/package/mz
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[github-tag]: http://img.shields.io/github/tag/normalize/mz.svg?style=flat-square
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[github-url]: https://github.com/normalize/mz/tags
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[travis-image]: https://img.shields.io/travis/normalize/mz.svg?style=flat-square
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[travis-url]: https://travis-ci.org/normalize/mz
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[coveralls-image]: https://img.shields.io/coveralls/normalize/mz.svg?style=flat-square
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[coveralls-url]: https://coveralls.io/r/normalize/mz?branch=master
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[david-image]: http://img.shields.io/david/normalize/mz.svg?style=flat-square
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[david-url]: https://david-dm.org/normalize/mz
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[license-image]: http://img.shields.io/npm/l/mz.svg?style=flat-square
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[license-url]: LICENSE
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[downloads-image]: http://img.shields.io/npm/dm/mz.svg?style=flat-square
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[downloads-url]: https://npmjs.org/package/mz
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