处理用户条件

运行 Node.js 时，可以使用 --conditions 标志添加自定义用户条件：

node --conditions=development main.js

可以使用重复标志设置任意数量的自定义条件。

When running Node.js, custom user conditions can be added with the --conditions flag:

node --conditions=development main.js

which would then resolve the "development" condition in package imports and exports, while resolving the existing "node", "default", "import", and "require" conditions as appropriate.

Any number of custom conditions can be set with repeat flags.