Angular Tour of Heroes错误导入HttpClientModule

Question

我正在尝试开始使用Angular教程。 https://angular.io/tutorial/toh-pt6

当我按照说明导入HttpClientModule时，我收到以下错误。

请帮忙。我在mac上使用npm。

Error: (SystemJS) XHR error (404 Not Found) loading http://localhost:3000/node_modules/@angular/common/bundles/common.umd.js/http
Error: XHR error (404 Not Found) loading http://localhost:3000/node_modules/@angular/common/bundles/common.umd.js/http
    at XMLHttpRequest.wrapFn (http://localhost:3000/node_modules/zone.js/dist/zone.js:1166:39)
    at ZoneDelegate.invokeTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:425:31)
    at Zone.runTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:192:47)
    at ZoneTask.invokeTask [as invoke] (http://localhost:3000/node_modules/zone.js/dist/zone.js:499:34)
    at invokeTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:1540:14)
    at XMLHttpRequest.globalZoneAwareCallback (http://localhost:3000/node_modules/zone.js/dist/zone.js:1566:17)
Error loading http://localhost:3000/node_modules/@angular/common/bundles/common.umd.js/http as "@angular/common/http" from http://localhost:3000/app/app.module.js
    at XMLHttpRequest.wrapFn (http://localhost:3000/node_modules/zone.js/dist/zone.js:1166:39)
    at ZoneDelegate.invokeTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:425:31)
    at Zone.runTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:192:47)
    at ZoneTask.invokeTask [as invoke] (http://localhost:3000/node_modules/zone.js/dist/zone.js:499:34)
    at invokeTask (http://localhost:3000/node_modules/zone.js/dist/zone.js:1540:14)
    at XMLHttpRequest.globalZoneAwareCallback (http://localhost:3000/node_modules/zone.js/dist/zone.js:1566:17)
Error loading http://localhost:3000/node_modules/@angular/common/bundles/common.umd.js/http as "@angular/common/http" from http://localhost:3000/app/app.module.js

Answer 1

您还应该通过添加：

来更改systemjs配置

 map: {
  ...
  '@angular/common/http': 'npm:@angular/common/bundles/common-http.umd.js',
  'tslib': 'npm:tslib/tslib.js'

另见

• (SystemJS) XHR error @angular/commobundles/common.umd.js/http not found