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:
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.
For me just running the below command is not enough (though a valid first step):
npm install -g typescript
The following command is what you need (I think deleting node_modules works too, but the below command is quicker)
npm link typescript
这应该可以解决问题,
npm install -g typescript
我能够通过删除node_modules
然后运行npm install
来解决这个问题
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
.angular-cli.json
from the root directory of the @angular/cli project. After I copied that file over all was running as expected.
If you don't have particular needs, I suggest to install Typescript locally.
npm install --global typescript # Global installation
npm install --save-dev typescript # Local installation
yarn global add typescript # Global installation
yarn add --dev typescript # Local installation
Run: npm link typescript
if you installed globally
But if you have not installed typescript try this command: npm install typescript
If you use yarn
instead of npm
, you can install typescript
package for that workspace by running:
yarn add typescript
or you can install it globally by running:
sudo yarn global add typescript
to be available for any project.
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
.
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.json
to the subfolder along with everything else. After noticing that and moving the file into the subdirectory, all was back to normal.
运行 'npm install' 它将安装所有必要的 pkg 。
如果你已经从 git 或其他地方克隆了你的项目,那么首先你应该输入npm install
。
The best way is to do: npm install
or npm i
this way all dependencies will be added.
I had this same problem using npm run start-dev
as configured my package.json ( "start-dev": "nodemon src/index.ts"
). When i used nodemon src/index.ts
in cmd work just fine, but to use npm run start-dev
i had to use npm link typescript
, it solve the problem.
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