angular - 升级到 Angular 6 后，应用程序显示空白屏幕
问题描述
我已按照https://update.angular.io/中给出的步骤 升级到 Angular 6 后，应用程序显示所有路线的空白屏幕。而且浏览器控制台中也没有显示错误。每个路由都重定向到默认路径http://localhost:4200。但是http://localhost:4200/admin工作正常。
谁能帮忙，可能是什么问题？您需要我提供什么信息来重现该问题？
以下是依赖项列表：
"dependencies": {
"@angular/animations": "6.0.3",
"@angular/cdk": "^6.2.0",
"@angular/common": "6.0.3",
"@angular/compiler": "6.0.3",
"@angular/core": "6.0.3",
"@angular/forms": "6.0.3",
"@angular/http": "6.0.3",
"@angular/material": "^6.2.0",
"@angular/material-moment-adapter": "^6.2.0",
"@angular/platform-browser": "6.0.3",
"@angular/platform-browser-dynamic": "6.0.3",
"@angular/router": "6.0.3",
"@ng-bootstrap/ng-bootstrap": "^2.0.0",
"@ngx-translate/core": "^10.0.2",
"@ngx-translate/http-loader": "^3.0.1",
"@swimlane/ngx-charts": "^8.0.2",
"@types/lodash": "^4.14.87",
"bootstrap": "4.0.0",
"chart.js": "^2.7.2",
"classlist.js": "^1.1.20150312",
"codelyzer": "^4.3.0",
"core-js": "^2.5.1",
"font-awesome": "^4.7.0",
"lodash": "^4.17.4",
"moment": "^2.19.3",
"ng2-charts": "^1.6.0",
"ng2-dragula": "^1.3.1",
"ng2-file-upload": "^1.3.0",
"ng4-charts": "^1.0.2",
"rxjs": "^6.2.0",
"web-animations-js": "^2.2.5",
"zone.js": "^0.8.19"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.6.6",
"@angular/cli": "^6.0.7",
"@angular/compiler-cli": "6.0.3",
"@types/jasmine": "2.5.38",
"@types/node": "^6.0.92",
"jasmine-core": "~2.5.2",
"jasmine-spec-reporter": "~3.2.0",
"karma": "~1.4.1",
"karma-chrome-launcher": "~2.0.0",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^0.2.0",
"karma-jasmine": "^1.1.1",
"karma-jasmine-html-reporter": "^0.2.2",
"node-sass": "^4.7.2",
"protractor": "~5.1.0",
"ts-node": "~2.0.0",
"tslint": "~5.10.0",
"typescript": "^2.7.2"
}
角.json
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"bcare": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist",
"index": "src/index.html",
"main": "src/main.ts",
"tsConfig": "src/tsconfig.app.json",
"polyfills": "src/polyfills.ts",
"assets": [
"src/assets"
],
"styles": [
"src/fonts.scss",
"src/styles.scss"
],
"scripts": []
},
"configurations": {
"prod": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
]
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "bcare:build"
},
"configurations": {
"prod": {
"browserTarget": "bcare:build:prod"
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "bcare:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"karmaConfig": "./karma.conf.js",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"scripts": [],
"styles": [
"src/fonts.scss",
"src/styles.scss"
],
"assets": [
"src/assets"
]
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"src/tsconfig.app.json",
"src/tsconfig.spec.json"
],
"exclude": []
}
}
}
},
"bcare-e2e": {
"root": "",
"sourceRoot": "",
"projectType": "application",
"architect": {
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "./protractor.conf.js",
"devServerTarget": "bcare:serve"
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"e2e/tsconfig.e2e.json"
],
"exclude": []
}
}
}
}
},
"defaultProject": "bcare",
"schematics": {
"@schematics/angular:component": {
"prefix": "cc",
"styleext": "scss"
},
"@schematics/angular:directive": {
"prefix": "cc"
}
}
}
应用程序路由.module.ts
import {RouterModule, Routes} from '@angular/router';
import {NotFoundComponent} from './core/main/not-found.component';
import {HomeComponent} from './core/main/home/home.component';
import {LoginComponent} from './core/main/login/login.component';
import {NgModule} from '@angular/core';
import {HomeGuard} from './core/main/home/home.guard';
import {CanLoadAdmin} from './core/services/can-load-admin';
import {RulesPreviewComponent} from './branches/preparation-admin/main/rules/rules-preview/rules-preview.component';
export const APP_ROUTES: Routes = [
{
path: '',
component: HomeComponent,
canActivate: [HomeGuard],
children: [
{
path: '',
redirectTo: 'preparation',
pathMatch: 'full'
},
{
path: 'preparation',
loadChildren: 'app/branches/preparation/preparation.module#PreparationModule'
},
{
path: 'admin',
loadChildren: 'app/admin/admin/admin.module#AdminModule',
canLoad: [CanLoadAdmin]
}
]
},
{path: 'login', component: LoginComponent},
{path: 'email-preview/:id', component: RulesPreviewComponent},
{path: '**', component: NotFoundComponent},
];
@NgModule({
imports: [RouterModule.forRoot(APP_ROUTES)],
exports: [RouterModule]
})
export class AppRoutingModule {
}
解决方案
从 Angular 5 更新到 6 后，我遇到了同样的问题。
我发现 Angular 根本没有在我的应用程序上加载，我什至没有收到消息“ Angular is running in the development mode. Call enableProdMode() to enable the production mode.” 经过一番挖掘后，我注意到使用 Angular 6 生成的文件之一是不同的。在它生成inline.js、polyfills.js、scripts.js和vendor.js之前main.js。从 Angular 6 开始，它现在生成runtime.js而不是inline.js. 我一直在使用 Angular 和 MVC，所以我直接引用了输出文件。我将引用从 更改inline.*为runtime.*（对于 MVC，它在 中BundlesConfig.cs），一切都再次正确。
/dist/除非您更改此设置，否则生成的文件应在其中生成。angular.json您可以在下确认路径projects -> my-project-name -> architect -> build -> options -> outputPath。
我在升级时遇到的另一个问题也可能与您的问题有关，因为 ng build 的 -ec 参数不再适用于 Angular 6，所以我的 css 文件不再生成；你现在必须使用--extract-css。
希望有帮助。
推荐阅读
- c# - 如何检查 Firestore 客户端是否离线并在 Unity 上更改为在线？
- arrays - 邮递员测试 - 验证数组中的值
- matlab - Matlab：获取表格中每个组的前/后 2 个排名观察值
- javascript - 在赛普拉斯测试规范中读取动态文件名
- node.js - 猫鼬在 findById 上给出错误无效类型
- sql-server - C#：如何单独查询 SQL Server？
- r - 在 R 中使用 ggplot 在绘图上绘制形状？
- smarty - 在 CS-Cart 中使用 Smarty 检查页面上是否存在网格类
- clean-architecture - 依赖关系向内显示是什么意思？
- python - 使用 BeautifulSoup 查找特定文本