目标必须是相对 URL

¥Targets must be relative URLs

"exports" 映射中的所有目标路径（与导出键关联的值）必须是以 ./ 开头的相对 URL 字符串。

¥All target paths in the "exports" map (the values associated with export keys) must be relative URL strings starting with ./.

// package.json
{
  "name": "my-package",
  "exports": {
    ".": "./dist/main.js",          // Correct
    "./feature": "./lib/feature.js", // Correct
    // "./origin-relative": "/dist/main.js", // Incorrect: Must start with ./
    // "./absolute": "file:///dev/null", // Incorrect: Must start with ./
    // "./outside": "../common/util.js" // Incorrect: Must start with ./
  }
} 拷贝

此行为的原因包括：

¥Reasons for this behavior include:

• 安全性：防止从包自身目录之外导出任意文件。

  ¥Security: Prevents exporting arbitrary files from outside the package's own directory.

• 封装：确保所有导出的路径都相对于包根目录进行解析，从而使包自包含。

  ¥Encapsulation: Ensures all exported paths are resolved relative to the package root, making the package self-contained.