angular - 在调用 AppComponent.ts 之前 Angular 2 的起点是什么？

Question

我想在 Angular 2 应用程序的起点做一些事情，但我无法做到这一点。如果有人知道这一点，请帮助我。

提前致谢。

Answer 1

Index.html是开始，它是连续的main.ts然后它与 <my-app> 一起使用继续下去

在 Index.html 之后，systemjs.config.js已加载。这告诉运行哪个文件。而在 systemjs.config.js , 它告诉加载 main.ts开始。

packages tells the System loader how to load when no filename and/or no extension

经过一些研究，看下面systemjs.config.js文件。注释说明它做什么以及什么时候做。

/**
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
(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: 'app',
      // 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',
      '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.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',
      //For android Internet
      'moment': 'npm:moment',
      'jquery':'npm:jquery/dist/jquery.js',
      'fullcalendar':'npm:fullcalendar/dist/fullcalendar.js'
    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.js',
        defaultExtension: 'js'
      },
      rxjs: {
        defaultExtension: 'js'
      },
      moment: { main: './moment.js', defaultExtension: 'js' } 
    }
  });
})(this);