Most likely you need to enable vendorSourceMap in angular.json under the build options or as a command argument vendor-source-map

enabling vendorSourceMap doesn't change anything on this issue

I have tried this out and adding vendorSourceMap did solve this issue;

Here's an extract from my angular.json

"build": {
  "builder": "@angular-devkit/build-angular:browser",
  "options": {
    "vendorSourceMap": true,
    "outputPath": "dist/some-app-name",
    "index": "src/index.html",
    "main": "src/main.ts",
    "polyfills": "src/polyfills.ts",
    "tsConfig": "src/tsconfig.app.json",
    "assets": [
      "src/favicon.ico",
      "src/assets"
    ],
    "styles": [
      "src/styles.css"
    ],
    "scripts": []
  },

the property in angular.json works, but is not compatible with the schema.json
the cli argument: ng serve --source-map --vendor-source-map doesn't work

there is a solution for this ?

I created a lib following this https://angular.io/guide/creating-libraries
Yet, any css related to the library provide a source map. All style are in a <style> tag.

I try to add "vendorSourceMap": true in my angular.json, but not working and found nothing elsewhere... Someone know a solution ?

Thank's

Mike

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