Angular every console.log comes from mainjs:1 in dev

Question

when starting my application with ng serve (now ng serve -- -c deploy, because of testing, every console.log comes from either main.js:1 or polyfills.js:1, independet from which component I call the console.log().

In an other stackoverflow (Angular console logs only from main.js:1 and polyfills.js:1) someone wrote that this appears because angular doesnt build dev and instead buils production.

Here is my angular.json

{
    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
    "version": 1,
    "newProjectRoot": "projects",
    "projects": {
        "project": {
            "projectType": "application",
            "schematics": {
                "@schematics/angular:component": {
                    "style": "scss"
                }
            },
            "root": "",
            "sourceRoot": "src",
            "prefix": "app",
            "architect": {
                "build": {
                    "builder": "@angular-devkit/build-angular:browser",
                    "options": {
                        "outputPath": "dist/project",
                        "index": "src/index.html",
                        "main": "src/main.ts",
                        "polyfills": "src/polyfills.ts",
                        "tsConfig": "tsconfig.app.json",
                        "aot": true,
                        "assets": [
                            "src/favicon.ico",
                            "src/assets"
                        ],
                        "styles": [
                            "src/styles.scss",
                            "src/custom-theme.scss",
                            "./node_modules/primeicons/primeicons.css",
                            "src/css/md-theme/theme.css",
                            "primeng/resources/themes/md-dark-indigo/theme.css",
                            "./node_modules/primeng/resources/primeng.min.css",
                            "./node_modules/primeflex/primeflex.css"
                        ],
                        "scripts": [
                            "./node_modules/libsignal-protocol/dist/libsignal-protocol.js"
                        ]
                    },
                    "configurations": {
                        "production": {
                            "fileReplacements": [
                                {
                                    "replace": "src/environments/environment.ts",
                                    "with": "src/environments/environment.prod.ts"
                                }
                            ],
                            "optimization": true,
                            "outputHashing": "all",
                            "sourceMap": true,
                            "namedChunks": false,
                            "extractLicenses": true,
                            "vendorChunk": false,
                            "buildOptimizer": true,
                            "budgets": [
                                {
                                    "type": "initial",
                                    "maximumWarning": "2mb",
                                    "maximumError": "5mb"
                                },
                                {
                                    "type": "anyComponentStyle",
                                    "maximumWarning": "6kb",
                                    "maximumError": "10kb"
                                }
                            ]
                        }
                    }
                },
                "serve": {
                    "builder": "@angular-devkit/build-angular:dev-server",
                    "options": {
                        "browserTarget": "project:build"
                    },
                    "configurations": {
                        "production": {
                            "browserTarget": "project:build:production"
                        },
                        "deploy": {
                            "browserTarget": "project:build"
                        }
                    }
                },
                "extract-i18n": {
                    "builder": "@angular-devkit/build-angular:extract-i18n",
                    "options": {
                        "browserTarget": "project:build"
                    }
                },
                "test": {
                    "builder": "@angular-devkit/build-angular:karma",
                    "options": {
                        "main": "src/test.ts",
                        "polyfills": "src/polyfills.ts",
                        "tsConfig": "tsconfig.spec.json",
                        "karmaConfig": "karma.conf.js",
                        "assets": [
                            "src/favicon.ico",
                            "src/assets"
                        ],
                        "styles": [
                            "src/styles.scss"
                        ],
                        "scripts": []
                    }
                },
                "lint": {
                    "builder": "@angular-devkit/build-angular:tslint",
                    "options": {
                        "tsConfig": [
                            "tsconfig.app.json",
                            "tsconfig.spec.json",
                            "e2e/tsconfig.json"
                        ],
                        "exclude": [
                            "**/node_modules/**"
                        ]
                    }
                },
                "e2e": {
                    "builder": "@angular-devkit/build-angular:protractor",
                    "options": {
                        "protractorConfig": "e2e/protractor.conf.js",
                        "devServerTarget": "project:serve"
                    },
                    "configurations": {
                        "production": {
                            "devServerTarget": "project:serve:production"
                        }
                    }
                }
            }
        }
    },
    "defaultProject": "project"
}

Answer 1

angular.json

"configurations": {
  "development": {
    "optimization": false,
    "outputHashing": "all",
    "sourceMap": true, // must
    "namedChunks": true,
    "extractLicenses": false,
    "vendorChunk": true,
    "buildOptimizer": false,
    "budgets": []
  }
},
"serve": {
  "builder": "@angular-devkit/build-angular:dev-server",
  "configurations": {
    "production": {
      "browserTarget": "demoproject:build:production"
    },
    "development": {     // must
      "browserTarget": "demoproject:build:development"
    }
  },
  "defaultConfiguration": "development" // must
}

environment.ts or environment.dev.ts

{
production: false
}

Answer 2

If you tried out everything dev vs prod environment related stuff and still doesn't wok:
as @jna said in this response, enabling JS source maps in chrome devTools could help.

Also: Open devTools, press F1 than check Enable JavaScript source map option.

Answer 3

In the newer versions of Angular, it by default is served in prod mode. You can create a dev setting under configurations after the production setting in your angular.json.

    "dev": {
        "optimization": true,
        "outputHashing": "all",
        "sourceMap": false,
        "extractCss": true,
        "namedChunks": false,
        "aot": false,
        "extractLicenses": true,
        "vendorChunk": false,
        "buildOptimizer": true,
        "fileReplacements": [
          {
            "replace": "src/environments/environment.ts",
            "with": "src/environments/environment.dev.ts"
          }
        ]}

And then try running your serve command as ng serve -c dev