使用通用的 async-tree 库进一步缩小一个小型 JavaScript 博客静态网站生成器
Using the async-tree library substantially cuts down the source code for a minimalist static site generator (SSG) in JavaScript, at a very modest cost in dependencies. The result is still fast and flexible.
使用 async-tree 库大大减少了 JavaScript 中极简静态网站生成器 (SSG) 的源代码，依赖成本非常低。结果仍然快速且灵活。
In the first post in this series, I recreated a simple blog in Astro that felt complicated. I rewrote the blog in plain JavaScript with zero dependencies. This post discusses yet another rewrite, this one predicated on sharing code.
在本系列的第一篇文章中，我重建了一个看起来复杂的 Astro 博客。我用零依赖的 纯 JavaScript 重写了这个博客。这篇文章讨论了另一个重写，这次是基于共享代码的。
You can look at the final async-tree blog source code and the live site.
您可以查看最终的 async-tree 博客 源代码 和 实时网站。
Okay, maybe a few dependencies
好吧，也许有一些依赖
The zero-dependency version felt quite good, although insisting on no dependencies was a little extreme.
零依赖版本感觉相当不错，尽管坚持 无 依赖有点极端。
While half the source code was unique to the project, the features in the other half can be cleanly handled by libraries, like:
虽然一半的源代码是项目独有的，但另一半的功能可以通过库来干净地处理，例如：
- Transforming markdown to HTML. Markdown processing can be expressed as a pure function that accepts markdown and returns HTML. A processor like marked fits the bill.
- 将markdown转换为HTML。Markdown处理可以表示为一个纯函数，该函数接受markdown并返回HTML。像 marked 这样的处理器符合要求。
- Transforming a blog feed from JSON Feed format to RSS.
- 将博客源 从 JSON Feed 格式转换为 RSS。
These are both pure functions, a much easier kind of dependency to take on. You decide when to call the function and what input to give it; it gives you back a result without any side effects. This contract greatly reduces the potential for surprise or frustration.
这些都是纯函数，这是一种更容易承担的依赖关系。你决定何时调用函数以及提供什么输入；它会给你返回一个结果，而没有任何副作用。这个契约大大减少了意外或挫折的可能性。
The async-tree library
async-tree 库
The remaining sharable code in the zero-dependency version comprises generic utility functions:
零依赖版本中剩余的可共享代码包括通用实用函数：
- A higher-order function that maps the keys and values of an object to return a new, transformed object
- 一个高阶函数，将对象的键和值映射以返回一个新的、转换后的对象
- A way to read a...