Sass-loader requires node-sass >=4 even if that exist - node.js

Question

I executed a update to angular 6. And during ng serve -o I receive error that sass-loader expect node-sass.
After run ng serve -o I receive:
ERROR in ./src/sass/styles.scss (./node_modules/raw-loader!./node_modules/postcss-loader/lib??embedded!./node_modules/sass-loader/lib/loader.js??ref--14-3!./src/sass/styles.scss)
Module build failed: Error: `sass-loader` requires `node-sass` >=4. Please install a compatible version.
at Object.sassLoader (node_modules\sass-loader\lib\loader.js:31:19)
ERROR in ./src/app/app.component.scss
Module build failed: Error: `sass-loader` requires `node-sass` >=4. Please install a compatible version.
at Object.sassLoader (node_modules\sass-loader\lib\loader.js:31:19)
ERROR in x.component.scss
Module build failed: Error: `sass-loader` requires `node-sass` >=4. Please install a compatible version.
at Object.sassLoader (\node_modules\sass-loader\lib\loader.js:31:19)
ERROR in x.component.scss
Module build failed: Error: `sass-loader` requires `node-sass` >=4. Please install a compatible version.
at Object.sassLoader (loader.js:31:19)
ERROR in .x.component.scss
Module build failed: Error: `sass-loader` requires `node-sass` >=4. Please install a compatible version.
at Object.sassLoader (node_modules\sass-loader\lib\loader.js:31:19)
Obvisously I check everything (in my opinion) and I don't have idea what's going on.
Package.Json:
"devDependencies": {
"#angular-devkit/build-angular": "~0.6.0",
"#angular/cli": "6.0.0",
"#angular/compiler-cli": "6.0.0",
"#angular/language-service": "6.0.0",
"#types/jasmine": "~2.8.3",
"#types/jasminewd2": "~2.0.2",
"#types/node": "~6.0.106",
"codelyzer": "^4.0.1",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~2.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-html-detailed-reporter": "^1.1.21",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-phantomjs-launcher": "^1.0.4",
"karma-teamcity-reporter": "^1.1.0",
"phantomjs-prebuilt": "^2.1.16",
"protractor": "~5.1.2",
"node-sass": "^4.9.0",
"sass-loader": "^7.0.1",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "2.7.2"
}
dir -l node_modules says:
...
05/07/2018 08:53 AM <DIR> node-sass
...
05/07/2018 08:53 AM <DIR> sass-loader
...
I executed:
npm rebuild node-sass
and secod approach:
I removed local node-module together with %User%\AppData\Roaming\npm-cache. then I removed lock file and execuded npm
npm cache clear --force
npm install
But still no success.
What do I miss ?

Answer 1

npm rebuild --force
aslo helps

Answer 2

I fixed it with
npm install node-sass
inside the project folder, and for the project, because installing it globally (with the -g option) didn't solve the issue.

Answer 3

I had same issue which I fixed using following steps:
Delete package-lock.json file.
Go to node_module folder and run rm -rf node_modules.
Run npm install
The package-lock.json file will auto-update with the new dependencies version.
hope it helps.

Answer 4

I fixed this issue using below steps:
Open package.json
Add which version you want to install of node-sass, for example "node-sass": "^4.12.0"
Run the installation command in command line interface (CLI): npm install node-sass
The issue will get resolved.

Answer 5

Simply run this code...
npm install --save node-sass

Answer 6

To solve your issue run this command
npm install --unsafe-perm

Answer 7

Following steps solved this issue
Delete node-saas folder in \Users\<user_id>\AppData\Roaming\npm-cache
Delete node-saas folder in <application_folder>/node_modules
Run npm install from <application_folder>

Answer 8

It could probably be a version mismatch. To install the working node-sass version, you can use
npm uninstall node-sass
npm install node-sass#4.14.0
And you can choose your version number based on the following table, and the node version you have installed, which you can check by node --version
You can find full info here
This has solved my issue

Answer 9

You can follow these steps:
First of all Delete package-lock.json file and node_modules.
and then Run npm install
The package-lock.json file will auto-update with the new dependencies version.