在组件中导入 Category 类

[sam (Sam Saffron)]

@rogerco

在脚本顶部添加 import Category from "discourse/models/category"; 时，报错提示：
SyntaxError: unknown: 'import' 和 'export' 只能出现在顶层

要使用这些功能，必须采用多 JS 文件组件。请参阅：

Split up theme Javascript into multiple files

Complex theme javascript can be split into multiple files, to keep things nicely organised. To use this functionality, simply add files to the /javascripts folder in your theme directory. These files can not be edited from the Discourse UI, so you must use the Theme CLI or source the theme from git. Javascript files are treated exactly the same as they are in core/plugins, so you should follow the same file/folder structure. Theme files are loaded after core/plugins, so if the filenames match,…