我在运行MEAN Stack应用程序时使用collections_extended
命令时遇到问题。我的终端运行良好,未发生任何错误。但是,当我在localhost:4200中打开浏览器时,我的应用程序未显示任何内容。然后控制台给我这个错误:
>>> from collections_extended import setlist
>>> sl = setlist('abracadabra')
>>> sl
setlist(('a', 'b', 'r', 'c', 'd'))
>>> sl[3]
'c'
>>> sl[-1]
'd'
>>> 'r' in sl # testing for inclusion is fast
True
>>> sl.index('d') # so is finding the index of an element
4
>>> sl.insert(1, 'd') # inserting an element already in raises a ValueError
ValueError
>>> sl.index('d')
4
我不知道为什么会这样,因为当我运行它时,使用ng-build --prod
而不使用> Uncaught Error: No NgModule metadata found for 'kc'.
at e.resolve (main.371a82c9fcb51afc1df0.js:1)
at e.getNgModuleMetadata (main.371a82c9fcb51afc1df0.js:1)
at e._loadModules (main.371a82c9fcb51afc1df0.js:1)
at e._compileModuleAndComponents (main.371a82c9fcb51afc1df0.js:1)
at e.compileModuleAsync (main.371a82c9fcb51afc1df0.js:1)
at e.compileModuleAsync (main.371a82c9fcb51afc1df0.js:1)
at e.bootstrapModule (main.371a82c9fcb51afc1df0.js:1)
at Object.zUnb (main.371a82c9fcb51afc1df0.js:1)
at p (runtime.a66f828dca56eeb90e02.js:1)
at Object.3 (main.371a82c9fcb51afc1df0.js:1)
,我的应用程序运行良好。这是我的 main.ts 文件:
ng-build
在我的 app.module.ts 下面:
--prod
更新: 当我使用 ng serve --prod 编译项目时,没有发现vendor.js:
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';
import 'hammerjs';
if (environment.production) {
enableProdMode();
}
const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);
platformBrowserDynamic().bootstrapModule(AppModule)
.catch(err => console.log(err));
document.addEventListener('DOMContentLoaded', () => {
platformBrowserDynamic().bootstrapModule(AppModule).then(() => {
if ('serviceWorker' in navigator && environment.production) {
navigator.serviceWorker.register('/ngsw-worker.js');
}
})
.catch(err => console.log(err));
});
但是当我编译 ng服务 vendor.js时发现:
import { Component } from '@angular/core';
import { AuthService } from '../services/auth.service';
import { Router } from '@angular/router';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'Internship Program Tracer';
constructor(
private authService : AuthService,
private router : Router,
){
}
ngOnInit() {
}
}
答案 0 :(得分:0)
如果问题仅在于产品构建,并且您的应用程序在ng serve上运行良好,请尝试执行此操作:
npm缓存清理--force
npm安装
npm install --save-dev @ angular / cli @ latest