我们的网站是一个现有的MVC网站,我们正在努力添加和替换角度为2的组件 . 我们没有完整的角度2应用程序可以启动,所以我们只是使用bootstrap在我们想要的页面上启动我们的组件 .
我将package.json依赖项从“2.0.0-rc.1”更新为“~2.2.0”,现在有了最新的angular 2文件 . 我不能再使用'@ angular / platform-browser-dynamic'中的import 并使用以下命令启动我的组件:bootstrap(MyCountComponent,[HTTP_PROVIDERS,MyService]);.
搜索它似乎已更新为从'@ angular / platform-browser-dynamic'导入;现在我应该启动:platformBrowserDynamic() . bootstrapModule(MyCountComponent,[HTTP_PROVIDERS,MyService]);
当我这样做时,我得到浏览器控制台错误:未处理的承诺拒绝:(SystemJS)没有找到'MyCountComponent'的NgModule元数据 . 错误:找不到'MyCountComponent'的NgModule元数据...
我是否需要立即将我的组件转换为模块,或者是否有一种新方法来引导启动没有模块的组件?
这是一个代码示例 .
//mycount.ts
import { MyService } from '../../services/my.service';
import { HTTP_PROVIDERS } from '@angular/http';
import { bootstrap } from '@angular/platform-browser-dynamic'
import { MyCountComponent } from './mycount.component';
bootstrap(MyCountComponent, [HTTP_PROVIDERS, MyService]);
//mycount.component.ts
import { Component } from '@angular/core';
import { NgControl } from '@angular/forms';
import { MyService } from '../../services/my.service';
@Component({
selector: 'mycount',
templateUrl: './app/components/mycount/mycount.component.html'
})
export class MyCountComponent {
constructor(private _myService: MyService) {
}
get mycount() {
return this._myService.mycount;
}
}
//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: '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',
'@angular/upgrade/static': 'npm:@angular/upgrade/bundles/upgrade-static.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: './main.js',
defaultExtension: 'js'
},
rxjs: {
defaultExtension: 'js'
}
}
});
})(this);
EDIT 如果我有:
@NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule
],
bootstrap: [MyCountComponent, MyListComponent, MyDetailsComponent],
declarations: [MyCountComponent, MyListComponent, MyDetailsComponent],
exports: [MyCountComponent, MyListComponent, MyDetailsComponent],
providers: [MyService]
})
我的页面是否可以仅加载1个或2个组件?我尝试用它调用它:
platformBrowserDynamic() . bootstrapModule(MyModule,[HttpModule,MyListComponent]);
但是我收到了页面中缺少的任何组件标签的错误消息 .
1 回答
您需要创建主@NgModule,您可以使用@NgModule导入所有服务,组件,指令等,您可以告诉您的应用程序应该引导哪个组件 .
这里有官方链接了解@ngModule请通过这个:https://angular.io/docs/ts/latest/guide/ngmodule.html
提示:请使用Angular-cli,这将在几分钟内创建应用程序的基本结构 . 使用Angular-cli,您无需创建结构化应用程序或基本设置,它将为您完成 .