Javascript 如何修复在 Angular 4 中找不到模块“typescript”？
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How to fix Cannot find module 'typescript' in Angular 4?
提问by redshot
I generated Angular 4 app 3 weeks ago using the @angular/cli. After 2 weeks, I tried to run it with the command line "ng serve"but I am prompted an error below:
我在 3 周前使用 @angular/cli 生成了 Angular 4 应用程序。2 周后，我尝试使用命令行运行它，"ng serve"但提示以下错误：
Cannot find module 'typescript'
Error: Cannot find module 'typescript'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (C:\Users\mypc\Documents\Angular Projects\my-angular-app\node_modules\@angular\cli\models\config\config.js:5:12)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
Do you have any idea how to fix this? Thanks.
你知道如何解决这个问题吗？谢谢。
回答by Sajeetharan
This should do the trick,
这应该可以解决问题，
npm install -g typescript
回答by DanAbdn
For me just running the below command is not enough (though a valid first step):
对我来说，仅运行以下命令是不够的（尽管这是有效的第一步）：
npm install -g typescript
npm install -g 打字稿
The following command is what you need (I think deleting node_modules works too but the below command is quicker).
以下命令是您所需要的（我认为删除 node_modules 也有效，但以下命令更快）。
npm link typescript
npm 链接打字稿
回答by redshot
I was able to solve this problem by removing node_modules then running "npm install"
我能够通过删除 node_modules 然后运行“npm install”来解决这个问题
回答by Torsten Barthel
I had a similar problem when I rearranged the folder structure of a project. I tried all the hints given in this thread but none of them worked. After checking further I discovered that I forgot to copy an important hidden file over to the new directory. That was
当我重新排列项目的文件夹结构时，我遇到了类似的问题。我尝试了该线程中给出的所有提示，但都没有奏效。进一步检查后，我发现我忘记将一个重要的隐藏文件复制到新目录中。那是
.angular-cli.json
.angular-cli.json
from the root directory of the @angular/cli project. After I copied that file over all was running as expected.
来自@angular/cli 项目的根目录。在我复制该文件后，一切都按预期运行。
回答by freedev
If you don't have particular needs, I suggest to install Typescript locally.
如果你没有特别的需求，我建议在本地安装 Typescript。
NPM Installation Method
NPM安装方法
npm install --global typescript # Global installation
npm install --save-dev typescript # Local installation
Yarn Installation Method
纱线安装方法
yarn global add typescript # Global installation
yarn add --dev typescript # Local installation
回答by vicatcu
I had a very similar problem after moving a working project to a new subdirectory on my file system. It turned out I had failed to move the file named .angular-cli.jsonto the subfolder along with everything else. After noticing that and moving the file into the subdirectory, all was back to normal.
将工作项目移动到文件系统上的新子目录后，我遇到了非常相似的问题。事实证明，我未能将命名.angular-cli.json的文件与其他所有内容一起移动到子文件夹中。注意到并将文件移动到子目录后，一切都恢复正常。
回答by Agustin Larreinegabe
I had the same problem. If you have installed first nodejs by apt and then you use the tar.gz from nodejs.org, you have to delete the folder located in /usr/lib/node_modules.
我有同样的问题。如果您首先通过 apt 安装了 nodejs，然后使用来自 nodejs.org 的 tar.gz，则必须删除位于/usr/lib/node_modules.
回答by Abdollah
If you use yarninstead of npm, you can install typescriptpackage for that workspace by running:
如果使用yarn代替npm，则可以typescript通过运行为该工作区安装包：
yarn add typescript
or you can install it globally by running:
或者您可以通过运行来全局安装它：
sudo yarn global add typescript
to be available for any project.
可用于任何项目。
回答by SATISH RAJNALE
Run 'npm install' it will install all necessary pkg .
运行 'npm install' 它将安装所有必需的 pkg 。
