小编sur*_*sea的帖子

迁移到NgModule后我收到此错误,错误没有太大帮助,请问有什么建议吗？

Error: Error: Unexpected value 'undefined' imported by the module 'AppModule'
        at new BaseException (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:5116:27)
        at eval (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:13231:35)
        at Array.forEach (native)
        at CompileMetadataResolver.getNgModuleMetadata (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:13215:48)
        at RuntimeCompiler._compileComponents (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:15845:51)
        at RuntimeCompiler._compileModuleAndComponents (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:15769:41)
        at RuntimeCompiler.compileModuleAsync (http://localhost:5555/node_modules/@angular/compiler/bundles/compiler.umd.js:15746:25)
        at PlatformRef_._bootstrapModuleWithZone (http://localhost:5555/node_modules/@angular/core/bundles/core.umd.js:9991:29)
        at PlatformRef_.bootstrapModule (http://localhost:5555/node_modules/@angular/core/bundles/core.umd.js:9984:25)
        at Object.eval (http://localhost:5555/app/main.js:8:53)
    Evaluating http://localhost:5555/app/main.js
    Error loading http://localhost:5555/app/main.js "Report this error at https://github.com/mgechev/angular2-seed/issues"(anonymous function) @ contracts:142ZoneDelegate.invoke @ zone.js?1472711930202:332Zone.run @ zone.js?1472711930202:225(anonymous function) @ zone.js?1472711930202:586ZoneDelegate.invokeTask @ zone.js?1472711930202:365Zone.runTask @ zone.js?1472711930202:265drainMicroTaskQueue @ zone.js?1472711930202:491ZoneTask.invoke @ zone.js?1472711930202:435

app.module.ts:

    import { NgModule } from '@angular/core';
    import { BrowserModule …

如何以编程方式获取APP_BASE_HREF？

我在app.module.ts中有这个(其中APP_BASE ='/'):

{
    provide: APP_BASE_HREF,
    useValue: '<%= APP_BASE %>'
},

我尝试着:

import { APP_BASE_HREF } from '@angular/common'; 
...
console.debug(APP_BASE_HREF.toString());

在控制台我得到:

Token appBaseHref

我需要得到:

http://localhost:5555/

我有一个"bootstrapModal"属性指令,它将bootstrap属性添加到host元素:

data-placement="top" data-toggle="modal" data-target="#DefaultModalWindow"

HostBinding是否可以使用这样的属性？

<htmltag ... bootstrapModal placement="left">

在指令中有类似的东西:

 @HostBinding('attributes.data-placement') // <== this dont work
 @Input() placement:string='top';

所以结果应该是:

<htmltag ... data-placement="left" data-toggle="modal" data-target="#DefaultModalWindow">