error TS2307: Cannot find module '@angular/core'

Question

So I get the following error when I tried building my application again:

ERROR in ../../../node_modules/@angular/cdk/a11y/typings/aria-describer/aria-describer

Answer 1

This problem apparently was being caused by the CDK and material modules of angular. I don't exactly know how it happend but I fixed it.

I fixed it by following an answer in this github issue: https://github.com/angular/material2/issues/8306

Solution

To fix this issue you have to run the following commands:

npm install --save @angular/material @angular/cdk
rm -rf node_modules
npm install

Answer 2

In order to fix this issue you have to update to Angular CLI version, as @angular cdk 6.0 requires @angular core 6.0 version(updated version). Try to use updated version for both CLI and material/CDK

Follow these steps:-

npm uninstall -g @angular/cli
npm cache verify

if npm version is less than 5 then use npm cache clean

npm install -g @angular/cli@latest

then create new angluar/cli project after that install @angular/material and @angular/cdk.

I hope this will solve your problem.

Answer 3

I see that some solutions are radical, I would not to try that in the first place. My solution was not radical, and it did the job.

I had the problem too, I did a simple npm update This was what came out:

$> npm update
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ rxjs@6.2.2
+ core-js@2.5.7
added 2 packages from 6 contributors and audited 38996 packages in 13.315s
found 0 vulnerabilities

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

+ @types/jasminewd2@2.0.4
updated 1 package and audited 38996 packages in 12.972s
found 0 vulnerabilities

And it solved the problem.

Answer 4

For me problem got resolved when I make sure that @angular/material, @angular/ckd and @angular/animations versions are compatible with @angular/core version. Just edit package.json.

In my case:

"@angular/core": "^7.2.15",
"@angular/animations": "^7.2.15",
"@angular/material": "^7.3.3",
"@angular/cdk": "^7.3.7",