使 ng 服务 Angular 4 时出错（缺少模块）

Question

我正在尝试使用 ng serve 在浏览器中打开我的项目，但每次运行该命令时，都会出现以下错误。

ERROR in ./node_modules/@angular/platform-browser/esm5/animations.js
Module not found: Error: Can't resolve '@angular/animations' in 
'/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/esm5'
resolve '@angular/animations' in 
'/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/esm5'
Parsed request is a module
using description file: 
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/package.json (relative path: ./esm5)
Field 'browser' doesn't contain a valid alias configuration
after using description file: 
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/package.json (relative path: ./esm5)
resolve as module
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/esm5/node_modules doesn't exist or is not a directory
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/platform-
browser/node_modules doesn't exist or is not a directory
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/node_modules 
doesn't exist or is not a directory
/home/easy/Desktop/wa7shy2/crm/node_modules/node_modules doesn't exist 
or is not a directory
/home/easy/Desktop/wa7shy2/node_modules doesn't exist or is not a 
directory
/home/easy/Desktop/node_modules doesn't exist or is not a directory
/home/easy/node_modules doesn't exist or is not a directory
/home/node_modules doesn't exist or is not a directory
/node_modules doesn't exist or is not a directory
looking for modules in /home/easy/Desktop/wa7shy2/crm/node_modules
using description file: /home/easy/Desktop/wa7shy2/crm/package.json 
(relative path: ./node_modules)
Field 'browser' doesn't contain a valid alias configuration
after using description file: 
/home/easy/Desktop/wa7shy2/crm/package.json (relative path: 
./node_modules)
using description file: 
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations/
package.json (relative path: .)
no extension
Field 'browser' doesn't contain a valid alias configuration          
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations is not 
a file.ts
Field 'browser' doesn't contain a valid alias configuration          
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations.ts 
doesn't exist.js
Field 'browser' doesn't contain a valid alias configuration          
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations.js 
doesn't exist
as directory
existing directory
using path: 
/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations/index
using description file: 

/home/easy/Desktop/wa7shy2/crm/node_modules/@angular/animations/ package.json（相对路径：./index）无扩展 字段“浏览器”不包含有效的别名配置
/home/easy/Desktop/wa7shy2/crm/src/@angular/animations/browser.ts 不存在.js

我很确定模块已经安装，我自己检查了路径，找到了所有说它没有找到的文件，尝试卸载并再次安装，仍然是同样的问题，有人告诉我这里出了什么问题。

我正在使用命令 npm install @angular/animations@latest --save 进行安装

Answer 1

我解决了我的问题，@angular/animations 文件夹是空的，所以我将备份 @angular 文件夹中丢失的文件复制到其中，现在它运行良好。