angular - 相当于 Angular 2 中的 $compile

Question

我想手动编译一些包含指令的 HTML。 Angular 2 中的 $compile 相当于什么？

例如，在 Angular 1 中，我可以动态编译 HTML 片段并将其附加到 DOM:

var e = angular.element('<div directive></div>');
element.append(e);
$compile(e)($scope);

Answer 1

Angular 2.3.0 (2016-12-07)

要获取所有详细信息，请检查:

• How can I use/create dynamic template to compile dynamic Component with Angular 2.0?

要查看实际效果:

• 观察a working plunker (适用于 2.3.0+)

主要内容:

1) 创建模板
2)创建组件
3)创建模块
4) 编译模块
5)创建(并缓存)ComponentFactory
6)使用Target创建它的实例

快速概述如何创建组件

createNewComponent (tmpl:string) {
  @Component({
      selector: 'dynamic-component',
      template: tmpl,
  })
  class CustomDynamicComponent  implements IHaveDynamicData {
      @Input()  public entity: any;
  };
  // a component for this particular template
  return CustomDynamicComponent;
}

一种将组件注入(inject)NgModule的方法

createComponentModule (componentType: any) {
  @NgModule({
    imports: [
      PartsModule, // there are 'text-editor', 'string-editor'...
    ],
    declarations: [
      componentType
    ],
  })
  class RuntimeComponentModule
  {
  }
  // a module for just this Type
  return RuntimeComponentModule;
}

如何创建 ComponentFactory (并缓存它)的代码片段

public createComponentFactory(template: string)
    : Promise<ComponentFactory<IHaveDynamicData>> {    
    let factory = this._cacheOfFactories[template];

    if (factory) {
        console.log("Module and Type are returned from cache")

        return new Promise((resolve) => {
            resolve(factory);
        });
    }

    // unknown template ... let's create a Type for it
    let type   = this.createNewComponent(template);
    let module = this.createComponentModule(type);

    return new Promise((resolve) => {
        this.compiler
            .compileModuleAndAllComponentsAsync(module)
            .then((moduleWithFactories) =>
            {
                factory = _.find(moduleWithFactories.componentFactories
                                , { componentType: type });

                this._cacheOfFactories[template] = factory;

                resolve(factory);
            });
    });
}

如何使用上述结果的代码片段

  // here we get Factory (just compiled or from cache)
  this.typeBuilder
      .createComponentFactory(template)
      .then((factory: ComponentFactory<IHaveDynamicData>) =>
    {
        // Target will instantiate and inject component (we'll keep reference to it)
        this.componentRef = this
            .dynamicComponentTarget
            .createComponent(factory);

        // let's inject @Inputs to component instance
        let component = this.componentRef.instance;

        component.entity = this.entity;
        //...
    });

包含所有详细信息的完整描述 read here ，或观察working example

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OBSOLETE - Angular 2.0 RC5 related (RC5 only)

to see previous solutions for previous RC versions, please, search through the history of this post