我正在尝试使用升级适配器在angular 1 app中开始使用angular 2组件。我按照这里的说明进行了操作:https://angular.io/docs/ts/latest/guide/upgrade.html,但是当我将组件添加到AppModule中的声明时,它给了我这个错误:
(index):47 Error: (SystemJS) Cannot read property 'downgradeNg2Component' of undefined(…)
(anonymous function) @ (index):47ZoneDelegate.invoke @ zone.js:203
Zone.run @ zone.js:96(anonymous function) @ zone.js:462
ZoneDelegate.invokeTask @ zone.js:236Zone.runTask @ zone.js:136
drainMicroTaskQueue @ zone.js:368ZoneTask.invoke @ zone.js:308
nrWrapper @ (index):37
我无法找到任何有类似问题的人,一切正常,直到我将组件添加到AppModule装饰器中的声明中。
这是我的app.component.ts文件:
import { Location } from '@angular/common';
import { adapter } from '../adapter';
console.log('COMPONENT');
@Component({
selector: 'hello',
template: `
<h1>Hello World</h1>
`
})
export class HelloComponent {
}
angular.module('nova.directives', [])
.directive('hello', [adapter.downgradeNg2Component(HelloComponent)])
这是main.ts文件:
import { AppModule } from './ng2app.module';
import { adapter } from './adapter';
console.log('MAIN');
adapter.bootstrap(document.querySelector('html'), ['nova']);
adapter.ts:
import { AppModule } from './ng2app.module';
console.log('ADAPTER');
export const adapter = new UpgradeAdapter(AppModule);
ng2app.module.ts:
import { BrowserModule } from '@angular/platform-browser';
import { HelloComponent } from './ng2Components/app.component';
console.log('MODULE');
@NgModule({
imports: [ BrowserModule ],
declarations: [ HelloComponent ]
})
export class AppModule {}
似乎app.component.ts由于某种原因正在加载其他所有内容。
这是我的systemjs.config文件(来自快速入门):
/**
* System configuration for Angular samples
* Adjust as necessary for your application needs.
*/
(function (global) {
System.config({
baseUrl: 'app',
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',
},
// 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'
},
'angular-in-memory-web-api': {
main: './index.js',
defaultExtension: 'js'
}
}
});
})(this);
该应用程序使用gulp来转换打字稿文件。
任何帮助追踪正在发生的事情都会很棒!
答案 0 :(得分:0)
我仍然不完全确定为什么导入先前破坏了,但我能够通过将调用downgradeNg2Component移动到ng2app.module.ts文件并从那里导出适配器来使其工作。我将只需要在该文件中添加所有指令声明,将它们绑定到angular 1 app。