I'm encountering an error while attempting to transition my Angular project from a CSS-based structure to SCSS. What could be causing this issue?

I am encountering difficulties while attempting to transition an Angular project from using CSS to SCSS/SASS.

I followed the steps outlined in this tutorial: https://medium.com/@ngubanethabo.ambrose/migrate-from-css-to-scss-stylesheets-for-existing-angular-application-d61f8061f5b7

After executing the command:

ng config schematics.@schematics/angular:component.styleext scss
    

I checked my angular.json file and confirmed that the value was correctly set as:

{"schematics": {"@schematics/angular:component": {"styleext": "scss"}}}

Next, I attempted to use the renamer tool as instructed but encountered an error with the command:

sudo renamer -d --path-element ext --find css -replace scss *
    

The output displayed the following error message:

Singular option already set [path-element=ext]
    

As a workaround, I manually performed the following operations:

However, upon running ng serve, I encountered the following error messages:

(List of errors related to module not found)
    

Why is this happening? What could be the issue? How can I successfully convert the project to SCSS?

EDIT-1: Here is the content of my angular.json file:

{
      "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
      "version": 1,
      (more content inside angular.json...)
    }
    

Answer №1

make an adjustment here:

"styles": [
          "src/styles.css"
        ],

change it to this:

"styles": [
          "src/styles.scss"
        ],

update:

remove the following line: "schematics": {}, and verify your @imports

update 2:

replace this:

           "styles": [
          "node_modules/bootstrap/dist/css/bootstrap.scss",
          "./node_modules/primeicons/primeicons.scss",
          "./node_modules/primeng/resources/themes/nova-light/theme.scss",
          "./node_modules/primeng/resources/primeng.min.scss",
          "node_modules/@fullcalendar/core/main.min.scss",
          "node_modules/@fullcalendar/daygrid/main.min.scss",
          "node_modules/@fullcalendar/timegrid/main.min.scss",
          "./node_modules/font-awesome/css/font-awesome.scss",
          "src/styles.scss"
        ],

with this:

           "styles": [
          "../node_modules/bootstrap/dist/css/bootstrap.scss",
          "../node_modules/primeicons/primeicons.scss",
          "../node_modules/primeng/resources/themes/nova-light/theme.scss",
          "../node_modules/primeng/resources/primeng.min.scss",
          "../node_modules/@fullcalendar/core/main.min.scss",
          "../node_modules/@fullcalendar/daygrid/main.min.scss",
          "../node_modules/@fullcalendar/timegrid/main.min.scss",
          "../node_modules/font-awesome/css/font-awesome.scss",
          "src/styles.scss"
        ],

Answer №2

After encountering a similar issue, I decided to rename the folder and it ended up resolving the problem for me.

Answer №3

To fix the issue, simply switch out -replace with --replace (two hyphens) and everything will work correctly.

Answer №4

The instructions provided in the guide along with the code you shared are all correct. The issue lies within the /.node_modules directory! Angular has built its internal aspects for css, but when modifications are made, the node_modules folder does not get updated.

To resolve this, you need to delete and reinstall the /.node_modules. This can be done using the command npm ci or

rm -rf ./node_modules && npm i
.

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