IO.js 2.2.1 发布，现已提供下载：io.js-2.2.1.zip 值得关注的变化如下： http: reverts the removal of an undocumented client property on client connections, this property is being used in the wild, most notably by request which is used by npm. (Michaël Zasso) #1852. 更多内容请查看发行说明。 IO.js 是为 V8 引擎编写的基于事件 IO 的实现。 构建要求： * `gcc` and `g++` 4.8 or newer, or * `clang` and `clang++` 3.3 or newer * Python 2.6 or 2.7 * GNU Make 3.81 or newer * libexecinfo (FreeBSD and OpenBSD only) IO.js 2.2.1 发布，服务器 JS 引擎下载地址
