在调用AppComponent.ts之前,Angular 2的起点是什么？

Question

我想在角度2应用程序的起点做一些事情,但我无法得到那一点.如果有人知道这件事,请帮助我.

提前致谢.

Answer 1

Index.html是开始，它是连续的main.ts，然后它随之而来<my-app>，一直持续下去

Index.html 之后，systemjs.config.js被加载。它告诉要运行哪个文件。在 中systemjs.config.js，它告诉加载main.ts以开始。

包告诉系统加载器在没有文件名和/或没有扩展名时如何加载

经过一番研究后，请查看以下systemjs.config.js文件。评论说明了它的作用和时间。

/**
 * 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);