问题描述
我想在 React Native 项目中使用 node js 作为后端.
I want to use node js as a backend in react native project .
推荐答案
是的,您可以使用 ReactNativify 为 Node 编写的包作为 Big Rich 正确地声明.一些需要考虑的事情:
Yes you can use packages written for Node by using ReactNativify as Big Rich rightfully states.Some things to consider though:
1) 我按照问题列表中的建议将 transformer.js
分成两部分:
1) I followed the advice I found in the issue list and split up transformer.js
in 2 parts:
transformers.js(在 /config
中并从 rn-cli.config.js
调用):
transformers.js (in /config
and invoked from rn-cli.config.js
):
const babelTransformer = require('./babel-transformer');
module.exports.transform = function(src, filename, options) {
const extension = String(filename.slice(filename.lastIndexOf('.')));
let result;
try {
result = babelTransformer(src, filename);
} catch (e) {
throw new Error(e);
return;
}
return {
ast: result.ast,
code: result.code,
map: result.map,
filename
};
};
babel-transformer.js(也在 /config
中):
'use strict'
const babel = require('babel-core');
/**
* This is your `.babelrc` equivalent.
*/
const babelRC = {
presets: ['react-native'],
plugins: [
// The following plugin will rewrite imports. Reimplementations of node
// libraries such as `assert`, `buffer`, etc. will be picked up
// automatically by the React Native packager. All other built-in node
// libraries get rewritten to their browserify counterpart.
[require('babel-plugin-rewrite-require'), {
aliases: {
constants: 'constants-browserify',
crypto: 'react-native-crypto',
dns: 'mock/dns',
domain: 'domain-browser',
fs: 'mock/empty',
http: 'stream-http',
https: 'https-browserify',
net: 'mock/net',
os: 'os-browserify/browser',
path: 'path-browserify',
pbkdf2: 'react-native-pbkdf2-shim',
process: 'process/browser',
querystring: 'querystring-es3',
stream: 'stream-browserify',
_stream_duplex: 'readable-stream/duplex',
_stream_passthrough: 'readable-stream/passthrough',
_stream_readable: 'readable-stream/readable',
_stream_transform: 'readable-stream/transform',
_stream_writable: 'readable-stream/writable',
sys: 'util',
timers: 'timers-browserify',
tls: 'mock/tls',
tty: 'tty-browserify',
vm: 'vm-browserify',
zlib: 'browserify-zlib'
},
throwForNonStringLiteral: true
}],
// Instead of the above you could also do the rewriting like this:
["module-resolver", {
"alias": {
"mock": "./config/mock",
"sodium-universal": "libsodium"
}
}]
]
};
module.exports = (src, filename) => {
const babelConfig = Object.assign({}, babelRC, {
filename,
sourceFileName: filename
});
const result = babel.transform(src, babelConfig);
return {
ast: result.ast,
code: result.code,
map: result.map,
filename
};
}
2) 正如你在上面的代码中看到的,我还使用 babel-plugin-module-resolver
进行了演示.
2) As you can see in the code above, I also demonstrated using the babel-plugin-module-resolver
.
注意,我将使用这个插件而不是 ReactNative 使用的插件.它允许您引用本地文件,并用适当的引号写入允许不符合 JS 的名称,例如sodium-universal"
Note, I will use this plugin instead of the one ReactNative uses. It allows you to reference local files, and written with proper quotes allows non-JS-compliant names like 'sodium-universal'
Note2 或者按照此评论中的概述使用 .babelrc
解决方案(可能是最干净的):https://github.com/philikon/ReactNativify/issues/4#issuecomment-312136794
Note2 Or go for .babelrc
solution (maybe cleanest) as outlined in this comment: https://github.com/philikon/ReactNativify/issues/4#issuecomment-312136794
3) 我发现我的项目根目录中仍然需要一个 .babelrc
来让我的 Jest 测试工作.有关详细信息,请参阅此问题:https://github.com/philikon/ReactNativify/issues/8
3) I found that I still needed a .babelrc
in the root of my project to make my Jest tests work. See this issue for details: https://github.com/philikon/ReactNativify/issues/8
这篇关于我们可以在 React Native 应用程序中使用 nodejs 代码吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!