angular7上传包到npm库 一、创建angular项目和组件 ng new myFirstDemo //angular-cli新建项目 ng g m component //新建模块 ng g c component/drop-down //新建组件 //提示：必须在组件里的drop-down.module.ts声明和导出 NgModule({ imports: [ CommonModule ], declarations: [DropDownComponent],