为什么我在node_modules中有@angular/core，但仍然出现这个错误？
Why do I have @angular/core in node_modules, but still get this error?
我从 angular.io 下载了一个示例项目，从这里
https://angular.io/generated/zips/cli-quickstart/cli-quickstart.zip
和 运行 npm install 在根文件夹中，如本教程中所述
https://www.youtube.com/watch?v=bJKejcQJqHE
不知何故，虽然我在 node_modules 和 package.json 中都有相应的 angular 包，但我还是得到了这个：
Hash: faeff28da7a6ba00851d
Time: 8547ms
chunk {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 171 kB {4} [initial] [rendered]
chunk {1} main.bundle.js, main.bundle.js.map (main) 5.41 kB {3} [initial] [rendered]
chunk {2} styles.bundle.js, styles.bundle.js.map (styles) 11.5 kB {4} [initial] [rendered]
chunk {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 2.18 MB [initial] [rendered]
chunk {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry] [rendered]
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (1,27): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (8,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (1,31): Cannot find module '@angular/platform-browser'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (2,26): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (16,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/main.ts (1,32): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/main.ts (2,40): Cannot find module '@angular/platform-browser-dynamic'.
ERROR in Could not resolve module @angular/core
webpack: Failed to compile.
webpack: Compiling...
Hash: faeff28da7a6ba00851d
Time: 807ms
chunk {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 171 kB {4} [initial]
chunk {1} main.bundle.js, main.bundle.js.map (main) 5.41 kB {3} [initial]
chunk {2} styles.bundle.js, styles.bundle.js.map (styles) 11.5 kB {4} [initial]
chunk {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 2.18 MB [initial]
chunk {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry]
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (1,27): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (8,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (1,31): Cannot find module '@angular/platform-browser'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (2,26): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (16,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/main.ts (1,32): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/main.ts (2,40): Cannot find module '@angular/platform-browser-dynamic'.
webpack: Failed to compile.
这在类似情况下有效：
在您的计算机上卸载 NodeJS。
如果使用可下载的软件包安装程序安装 -（添加删除程序 > Select NodeJS 并单击卸载）
下载并安装 NodeJS 6.10.3 (https://nodejs.org/dist/v6.10.3/node-v6.10.3-x64.msi)
清理node_modules文件夹
rm -rf node_modules/
清理所有临时文件夹
运行这些命令
npm uninstall -g angular-cli
npm cache clean
npm install -g @angular/cli
npm install
我从 angular.io 下载了一个示例项目，从这里 https://angular.io/generated/zips/cli-quickstart/cli-quickstart.zip
和 运行 npm install 在根文件夹中，如本教程中所述
https://www.youtube.com/watch?v=bJKejcQJqHE
不知何故，虽然我在 node_modules 和 package.json 中都有相应的 angular 包，但我还是得到了这个：
Hash: faeff28da7a6ba00851d
Time: 8547ms
chunk {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 171 kB {4} [initial] [rendered]
chunk {1} main.bundle.js, main.bundle.js.map (main) 5.41 kB {3} [initial] [rendered]
chunk {2} styles.bundle.js, styles.bundle.js.map (styles) 11.5 kB {4} [initial] [rendered]
chunk {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 2.18 MB [initial] [rendered]
chunk {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry] [rendered]
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (1,27): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (8,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (1,31): Cannot find module '@angular/platform-browser'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (2,26): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (16,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/main.ts (1,32): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/main.ts (2,40): Cannot find module '@angular/platform-browser-dynamic'.
ERROR in Could not resolve module @angular/core
webpack: Failed to compile.
webpack: Compiling...
Hash: faeff28da7a6ba00851d
Time: 807ms
chunk {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 171 kB {4} [initial]
chunk {1} main.bundle.js, main.bundle.js.map (main) 5.41 kB {3} [initial]
chunk {2} styles.bundle.js, styles.bundle.js.map (styles) 11.5 kB {4} [initial]
chunk {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 2.18 MB [initial]
chunk {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry]
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (1,27): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.component.ts (8,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (1,31): Cannot find module '@angular/platform-browser'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (2,26): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/app/app.module.ts (16,14): Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.
ERROR in /home/ivan/anglr-lrn/src/main.ts (1,32): Cannot find module '@angular/core'.
ERROR in /home/ivan/anglr-lrn/src/main.ts (2,40): Cannot find module '@angular/platform-browser-dynamic'.
webpack: Failed to compile.
这在类似情况下有效：
在您的计算机上卸载 NodeJS。
如果使用可下载的软件包安装程序安装 -（添加删除程序 > Select NodeJS 并单击卸载）
下载并安装 NodeJS 6.10.3 (https://nodejs.org/dist/v6.10.3/node-v6.10.3-x64.msi)
清理node_modules文件夹
rm -rf node_modules/
清理所有临时文件夹
运行这些命令
npm uninstall -g angular-cli
npm cache clean
npm install -g @angular/cli
npm install