The main field is a module ID that is the primary entry point to your program. That is, if your package is named foo, and a user installs it, and then does require("foo"), then your main module’s exports object will be returned. This should be a module ID relative to the root of your package folder. For most modules, it makes the most sense to have a main script and often not much else.
- Package.json 里面不要出现中文，不然会出现解析错误