angular - 基于 angular 9 迁移的 angular 生产问题

Question

hello Everyone, i am getting issue on angular after migration, I have migrated the project to angular 9 from angular 8 . the angular with ng server --prod works in version 8 but on version 9 i am getting error . i have checked with ng build --prod and ng serve --prod. As the new angular 9 has IVY compiler for AOT compilation so i have imported angular/compiler in main.ts, also the bootstrap is injecting with platformBrowserDynamic as i can see angular 8/9 uses jit compilation for ng serve on development mode so project is running on jit but as angular is using aot comilation for production my codebase gets errors

pollyfills.ts
`
导入'@angular/编译器';
导入 '@angular/localize/init';
导入 'core-js/es/array';
导入 'zone.js/dist/zone';

`

**main.ts**

`

import '@angular/compiler';
    import { enableProdMode } from '@angular/core';
    import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

    import { AppModule } from './app/app.module';
    import { environment } from './environments/environment';

    if (environment.production) {
      enableProdMode();
    }

    platformBrowserDynamic().bootstrapModule(AppModule);
`

**package.json**
`{
  "name": "project",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^9.0.5",
    "@angular/cdk": "^9.0.0",
    "@angular/common": "^9.0.5",
    "@angular/compiler": "^9.0.5",
    "@angular/core": "^9.0.5",
    "@angular/forms": "^9.0.5",
    "@angular/http": "^7.2.16",
    "@angular/localize": "^9.0.5",
    "@angular/material": "^7.3.2",
    "@angular/platform-browser": "^9.0.5",
    "@angular/platform-browser-dynamic": "^9.0.5",
    "@angular/router": "^9.0.5",
    "@ng-bootstrap/ng-bootstrap": "^6.0.0",
    "@ngx-translate/core": "^12.1.2",
    "@ngx-translate/http-loader": "^4.0.0",
    "@sentry/browser": "^5.13.2",
    "angular-file-uploader": "^5.0.2",
    "angular-ng-autocomplete": "^2.0.1",
    "angular2-signaturepad": "^2.11.0",
    "core-js": "^3.6.4",
    "jquery": "^3.4.1",
    "moment": "^2.24.0",
    "ng2-haversine": "^0.1.1",
    "ng2-uploader": "^2.0.0",
    "ngx-spinner": "^8.1.0",
    "ngx-ui-loader": "^8.0.0",
    "rxjs": "^6.5.4",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.900.5",
    "@angular/cli": "~9.0.5",
    "@angular/compiler-cli": "^9.0.5",
    "@angular/language-service": "^9.0.5",
    "@types/jasmine": "~3.5.7",
    "@types/jasminewd2": "~2.0.8",
    "@types/jquery": "^3.3.33",
    "@types/node": "~13.7.7",
    "codelyzer": "~5.2.1",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^4.4.1",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~2.1.1",
    "karma-jasmine": "~3.1.1",
    "karma-jasmine-html-reporter": "^1.5.2",
    "protractor": "^5.4.3",
    "ts-node": "~8.6.2",
    "tslint": "~6.0.0",
    "typescript": "^3.6.4"
  }
}
`
**angular.json**
`{
    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
    "version": 1,
    "newProjectRoot": "projects",
    "projects": {
      "project": {
        "root": "",
        "sourceRoot": "src",
        "projectType": "application",
        "prefix": "app",
        "schematics": {},
        "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": "src/tsconfig.app.json",
              "assets": [
                "src/favicon.ico",
                "src/assets"
              ],
              "styles": [
                "src/styles.css"
              ],
              "scripts": []
            },
            "configurations": {
              "production": {
                "fileReplacements": [
                  {
                    "replace": "src/environments/environment.ts",
                    "with": "src/environments/environment.prod.ts"
                  }
                ],
                "optimization": true,
                "outputHashing": "all",
                "sourceMap": false,
                "extractCss": true,
                "namedChunks": false,
                "aot": true,
                "extractLicenses": true,
                "vendorChunk": false,
                "buildOptimizer": true
              }
            }
          },
          "serve": {
            "builder": "@angular-devkit/build-angular:dev-server",
            "options": {
              "browserTarget": "project:build"
            },
            "configurations": {
              "production": {
                "browserTarget": "project:build:production"
              }
            }
          },
          "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": "src/tsconfig.spec.json",
              "karmaConfig": "src/karma.conf.js",
              "styles": [
                "src/styles.css"
              ],
              "scripts": [],
              "assets": [
                "src/favicon.ico",
                "src/assets"
              ]
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "src/tsconfig.app.json",
                "src/tsconfig.spec.json"
              ],
              "exclude": [
                "**/node_modules/**"
              ]
            }
          }
        }
      },
      "project-e2e": {
        "root": "e2e/",
        "projectType": "application",
        "architect": {
          "e2e": {
            "builder": "@angular-devkit/build-angular:protractor",
            "options": {
              "protractorConfig": "e2e/protractor.conf.js",
              "devServerTarget": "project:serve"
            },
            "configurations": {
              "production": {
                "devServerTarget": "project:serve:production"
              }
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": "e2e/tsconfig.e2e.json",
              "exclude": [
                "**/node_modules/**"
              ]
            }
          }
        }
      }
    },
    "defaultProject": "project",
    "cli": {
      "analytics": "87b84483-668a-45d2-a5fa-0b6badd7e97e"
    }
  }

`

tsconfig.json
`

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "es2015",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "enableIvy": true
  }
}

`

我在 Chrome 控制台上遇到以下 ng serve --prod 或 ng serve --prod --aot=true 问题。
`

polyfills.9b85908313a7766a001a.js:1.
 Unhandled Promise rejection: Angular JIT compilation failed: '@angular/compiler' not loaded!
  - JIT compilation is discouraged for production use-cases! Consider AOT mode instead.
  - Did you bootstrap using '@angular/platform-browser-dynamic' or '@angular/platform-server'?
  - Alternatively provide the compiler with 'import "@angular/compiler";' before bootstrapping. ; Zone: <root> ; Task: Promise.then ; Value: Error: Angular JIT compilation failed: '@angular/compiler' not loaded!
  - JIT compilation is discouraged for production use-cases! Consider AOT mode instead.
  - Did you bootstrap using '@angular/platform-browser-dynamic' or '@angular/platform-server'?
  - Alternatively provide the compiler with 'import "@angular/compiler";' before bootstrapping.
    at Q (main.a41bfed0d971f96f8f03.js:1)
    at Function.get (main.a41bfed0d971f96f8f03.js:1)
    at $e (main.a41bfed0d971f96f8f03.js:1)
    at Qa (main.a41bfed0d971f96f8f03.js:1)
    at main.a41bfed0d971f96f8f03.js:1
    at e.processProvider (main.a41bfed0d971f96f8f03.js:1)
    at main.a41bfed0d971f96f8f03.js:1
    at main.a41bfed0d971f96f8f03.js:1
    at Array.forEach (<anonymous>)
    at Se (main.a41bfed0d971f96f8f03.js:1) Error: Angular JIT compilation failed: '@angular/compiler' not loaded!
  - JIT compilation is discouraged for production use-cases! Consider AOT mode instead.
  - Did you bootstrap using '@angular/platform-browser-dynamic' or '@angular/platform-server'?
  - Alternatively provide the compiler with 'import "@angular/compiler";' before bootstrapping.
    at Q (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:138535)
    at Function.get (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:198740)
    at $e (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:144912)
    at Qa (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:204231)
    at http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:202451
    at e.processProvider (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:202465)
    at http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:202249
    at http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:141452
    at Array.forEach (<anonymous>)
    at Se (http://localhost:4200/main.a41bfed0d971f96f8f03.js:1:141399)

`

when i use ng serve it serve on my localhost without issue, but when i add the prod keyword or trying to make a build with ng build --prod . the dist folder does not work on my dev server and i am getting the above errors.

Answer 1

通过在 main.ts 文件中导入编译器
导入'@angular/编译器';