本指南以 Boa 仓库中的 examples/README.md为纲，系统讲解如何把 Boa 这个用 Rust 编写的可嵌入 JavaScript 引擎集成进自己的 Rust 程序。你将学会从加载一段 JS 字符串、执行一个 .js 文件开始，逐步掌握在 Rust 侧操作数组、Map、Set、TypedArray 等内置对象、注册原生函数与自 ...

1. JavaScript声明提升的本质解析 在JavaScript开发中，声明提升（Hoisting）是个让新手开发者既困惑又着迷的概念。想象一下你正在调试一段代码，明明变量声明写在后面，却在前面就能访问到——这就是声明提升在"作怪"。这种现象源于JavaScript引擎在解释执行代码前的预处理阶段。

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