Question

我现在正在尝试学习Angular 2并且正在尝试我的第一个Hello World应用程序，但它只是停留在＆＃34;正在加载......＆＃34;在我点击npm start

之后

我在Windows 10上运行了所有浏览器（Chrome，Edge和IE），但遇到了同样的错误。

我还没有找到答案，这对我有帮助，所以请帮助!!

index.html

<html>

  <head>
    <title>My First Angular App</title>
    <meta charset = "UTF-8">
    <meta name="viewport" content ="width = device-width, initial-scale = 1">
    <link rel="stylesheet" href="styles.css">
    <!-- 1. Load libraries -->
    <script src="node_modules/core-js/client/shim.min.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <script src="node_modules/zone.js/dist/zone.js"></script>
    <script src="node_modules/reflect-metadata/Reflect.js"></script>
    <!-- 2. Configure SystemJS -->
    <script src="systemjs.config.js"></script>
    <script>
      System.import('app').catch(function(err){console.error(err);});
    </script>

  </head>

  <!-- 3. Display the application -->
  <body>
    <my-app>Loading...
    </my-app>
  </body>

</html>

main.ts

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

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

const platform = platformBrowserDynamic();

platform.bootstrapModule(AppModule);

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { AppComponent } from './app.component';

@NgModule({
  imports: [ BrowserModule],
  declarations: [ AppComponent ],
  bootstrap: [ AppComponent ]
})

export class AppModule {}

app.component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  template: '<h1>Hello World</h1>',
})

export class AppComponent {}

systemjs.config.js

(function (global) {
    System.config({
        paths: {
            // paths serve as alias
            'npm:': 'node_modules/'
        },
        // map tells the System loader where to look for things
        map: {
            // our app is within the app folder
            app : 'ScriptsApp', // 'dist',
            // angular bundles
            '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
            '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
            '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
            '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
            '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
            '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
            '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
            '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
            // other libraries
            'rxjs': 'npm:rxjs',
            'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
        },
        // packages tells the System loader how to load when no filename and/or no extension
        packages: {
            app: { main: './boot.js', defaultExtension: 'js' },
            rxjs: { defaultExtension: 'js' }
        }
    });
})(this);

的package.json

{
  "name": "angular-app",
  "version": "1.0.0",
  "description": "QuickStart package.json from the documentation, supplemented with testing support",
  "scripts": {
    "start" : "concurrently \"npm run tsc:w\" \"npm run lite\" ",
    "lite": "lite-server",
    "tsc": "tsc",
    "tsc:w": "tsc -w"
  },
  "license": "MIT",
  "dependencies": {
    "@angular/common": "~2.4.0",
    "@angular/compiler": "~2.4.0",
    "@angular/core": "~2.4.0",
    "@angular/forms": "~2.4.0",
    "@angular/http": "~2.4.0",
    "@angular/platform-browser": "~2.4.0",
    "@angular/platform-browser-dynamic": "~2.4.0",
    "@angular/router": "~3.4.0",
    "@angular/upgrade": "~2.4.0",

    "angular-in-memory-web-api": "~0.2.4",
    "systemjs": "0.19.40",
    "core-js": "^2.4.1",
    "rxjs": "5.0.1",
    "zone.js": "^0.7.4"
  },
  "devDependencies": {
    "concurrently": "^3.2.0",
    "lite-server": "^2.2.2",
    "typescript": "~2.0.10",
    "@types/node": "^6.0.46",
    "@types/core-js": "^0.9.34"
  }
}

所有这些都已编译成js文件。我没有收到任何错误消息，页面只是停留在＆＃34;正在加载......＆＃34;

Angular 2新应用程序停留在＆＃34;正在加载......＆＃34;

0 个答案: