安设
假定您依然安设了 Node.js北京铁皮保温施工，创建目次以保存诓骗智力，并将其配置为使命目次。
Express 4.x requires Node.js .1 or higher. Express 5.x requires Node.js 18 or higher.使用 npm init 号召为诓骗智力创建 package.json 文献。 干系 package.json 使命式的多信息，请参阅 Specifics of npm’s package.json handling。 For more information on how package.json works, see Specifics of npm’s package.json handling.
This command prompts you for a number of things北京铁皮保温施工, such as the name and version of your application. For now, you can simply hit RETURN to accept the defaults for most of them, with the following exception:
输入 app.js，铁皮保温大要您但愿使用的任何主文献称呼。若是但愿文献名为 index.js，请按回车键以接收提出的缺省文献名。 If you want it to be index.js, hit RETURN to accept the suggested default file name.
在 myapp 目次中安设 Express，然后将其保存在依赖项列表中。举例： For example:
要暂时安设 Express 而不将其添加到依赖项列表中：北京铁皮保温施工
Next: Express“Hello World”示例