在Angular 4 / 5-中编译动态HTML,类似于Angular JS中的$compile

我希望通过服务调用服务器接收HTML数据(这是肯定的.我不能在本地保存模板)并在内部操作它们如何显示它(作为模态或整页).带有Angular标记的HTML应该循环到一个组件并一起工作.在Angular JS中大多数是$compile.

我正在开发Angular 5中的解决方案,并且应该与AOT编译器兼容.我已经提到了几个解决方案,并且对已弃用和更新的解决方案感到困惑.请帮帮我.我相信你的最新答案也可以帮助很多其他人..非常感谢你提前！

要动态呈现HTML,您需要DomSanitizer.例如.像这样的东西：

<!-- template -->
<div [innerHTML]="htmlData"></div>

// component
import { Component } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';

@Component({
  selector: 'my-app',templateUrl: './app.component.html',styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  htmlData: any;
  constructor(private sanitizer: DomSanitizer) {}

  ngOnInit() {
    this.htmlData= this.sanitizer.bypassSecurityTrustHtml('<div style="border: 1px solid red;"><h2>Safe Html</h2><span class="user-content">Server prepared this html block.</span></div>');
  }
}

现在,这就是它的要点.你显然还需要一个加载机制.您可能还希望在此块中包含一些数据 – 如果它是简单数据,则可以在运行中：

this.htmlData = this.sanitizer.bypassSecurityTrustHtml(`<div>${this.someValue}</div>`);

对于更复杂的方案,您可能需要创建动态组件.

编辑：动态解析的组件示例.有了这个,您可以从服务器发送的html中即时创建一个组件.

@Component({
  selector: 'my-component',template: `<h2>Stuff bellow will get dynamically created and injected<h2>
          <div #vc></div>`
})
export class TaggedDescComponent {
  @ViewChild('vc',{read: ViewContainerRef}) vc: ViewContainerRef;

  private cmpRef: ComponentRef<any>;

  constructor(private compiler: Compiler,private injector: Injector,private moduleRef: NgModuleRef<any>,private backendService: backendService,) {}

  ngAfterViewInit() {
    // Here,get your HTML from backend.
    this.backendService.getHTMLFromServer()
        .subscribe(rawHTML => this.createComponentFromRaw(rawHTML));
  }

  // Here we create the component.
  private createComponentFromRaw(template: string) {
    // Let's say your template looks like `<h2><some-component [data]="data"></some-component>`
    // As you see,it has an (existing) angular component `some-component` and it injects it [data]

    // Now we create a new component. It has that template,and we can even give it data.
    const tmpCmp = Component({ template,styles })(class {
      // the class is anonymous. But it's a quite regular angular class. You could add @Inputs,// @Outputs,inject stuff etc.
      data: { some: 'data'};
      ngOnInit() { /* do stuff here in the dynamic component */}
    });

    // Now,also create a dynamic module.
    const tmpModule = NgModule({
      imports: [RouterModule],declarations: [tmpCmp],// providers: [] - e.g. if your dynamic component needs any service,provide it here.
    })(class {});

    // Now compile this module and component,and inject it into that #vc in your current component template.
    this.compiler.compileModuleAndAllComponentsAsync(tmpModule)
      .then((factories) => {
        const f = factories.componentFactories[0];
        this.cmpRef = f.create(this.injector,[],null,this.moduleRef);
        this.cmpRef.instance.name = 'my-dynamic-component';
        this.vc.insert(this.cmpRef.hostView);
      });
  }

  // Cleanup properly. You can add more cleanup-related stuff here.
  ngOnDestroy() {
    if(this.cmpRef) {
      this.cmpRef.destroy();
    }
  }
}

在Angular 4 / 5-中编译动态HTML,类似于Angular JS中的$compile

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