显式指定的 Node.js 环境的 SSR 实现。如传统 Node.js 服务（Express/Koa 搭建的服务）。

'use strict';

var l, s;
if (process.env.NODE_ENV === 'production') {
  l = require('./cjs/react-dom-server-legacy.node.production.js');
  s = require('./cjs/react-dom-server.node.production.js');
} else {
  l = require('./cjs/react-dom-server-legacy.node.development.js');
  s = require('./cjs/react-dom-server.node.development.js');
}

exports.version = l.version;
exports.renderToString = l.renderToString;
exports.renderToStaticMarkup = l.renderToStaticMarkup;
exports.renderToPipeableStream = s.renderToPipeableStream;
exports.renderToReadableStream = s.renderToReadableStream;
exports.resumeToPipeableStream = s.resumeToPipeableStream;
exports.resume = s.resume;